# Best App Store Optimization Companies (2026)

> Ranked list of the best app store optimization companies in 2026, with real pricing data, strengths, weaknesses, and when a self-serve ASO tool is enough.

- **Author:** Peter Sutarik
- **Published:** July 21, 2026
- **Tags:** aso agencies, app store optimization, aso pricing, aso tools
- **Reading time:** 19 min
- **Canonical:** https://trysonar.app/blog/best-aso-agencies

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## What Do App Store Optimization Companies Cost?

Most app store optimization companies charge $5,000 to $15,000 per month, with enterprise-tier firms exceeding $25,000 per month ([source: AppAgent, "App Store Optimization Pricing," 2026](https://appagent.com/blog/app-store-optimization-pricing/)). A self-serve ASO tool like Sonar starts at [$19/month](https://trysonar.app/pricing) — a 260:1 cost difference for the same core keyword research and metadata work. That agency spend makes sense for apps with millions of users and dozens of localized storefronts. For a single-market app, the tool does the job.

Over the past 18 months I reviewed proposals from 12 ASO agencies while building Sonar's competitive benchmarks. This article ranks seven app store optimization agencies by specialty and sourced pricing, then explains exactly when a self-serve tool replaces the agency entirely.

If you want a broader breakdown of cost tiers — freelancer, agency, DIY — see our [ASO cost guide](https://trysonar.app/blog/aso-cost).

## How I Evaluated These ASO Agencies

Every agency on this list meets three criteria. First, ASO is a named, standalone service — not a line item buried inside a full-service marketing package. Second, at least one public source (Clutch, G2, or the agency's own site) provides pricing signals. Third, the agency has verifiable client results or a named client roster.

I excluded full-service mobile marketing firms (like Moburst) that bundle ASO with UA, CRM, and creative production. For those, see our [best app marketing agencies](https://trysonar.app/blog/best-app-marketing-agencies) list. In testing 200+ apps through Sonar's keyword index, I found that the agencies below consistently produced data-backed strategies rather than generic keyword lists. They are ASO-first or ASO-only.

## 1. Gummicube — Best for Enterprise Keyword Intelligence

Gummicube has operated as a dedicated ASO firm since 2010, making it one of the longest-running specialists in the space. In 2022, Airship acquired Gummicube, integrating it into their mobile app experience platform ([source: Airship press release, June 2022](https://www.airship.com/company/press-releases/airship-acquires-gummicube-to-create-the-first-comprehensive-mobile-app-experience-management-solution/)). All 80 employees joined Airship, with co-founders Dave Bell and Anh Nguyen becoming VPs of the Gummicube division.

**What they do well:** Proprietary keyword data via their DATACUBE platform, plus Splitcube for creative A/B testing outside the live listing. Named clients include Microsoft, LinkedIn, and GrubHub. Xerox reported a 141% visibility increase from Gummicube's optimization ([source: Gummicube case studies](https://www.gummicube.com/)).

**Pricing:** No public rate card. Clutch data indicates a $1,000+ minimum project size, $50–$99/hour, with most engagements landing between $25,000 and $60,000+ total. Full-service retainers are estimated at $15,000–$50,000/month ([source: Clutch profile, 2026](https://clutch.co/profile/gummicube); [AppFollow, "App Store Optimization Cost 2026"](https://appfollow.io/blog/app-store-optimization-cost)).

**Key client:** Microsoft

**Best for:** Enterprise apps needing proprietary keyword intelligence and a team that has optimized thousands of listings since before ASO had a name.

**Skip if:** You are pre-revenue or need fast, lightweight iteration rather than managed service.

## 2. Phiture — Best for Data-Driven ASO Strategy

Phiture is a Berlin-based mobile growth consultancy that built its reputation on the ASO Stack framework — a structured methodology covering keyword optimization, conversion rate optimization, A/B testing, and localization. In February 2026, Phiture was acquired by Precis, a Stockholm-based performance marketing group ([source: Precis press release, February 2026](https://www.precis.com/resources/precis-and-phiture-join-forces)).

**What they do well:** Their ASO Stack is one of the few publicly documented frameworks in the industry. Named clients include Spotify, Headspace, and NordVPN. Phiture also built PressPlay, a proprietary platform for creative testing at scale.

**Pricing:** No public rate card. Clutch indicates a $25,000+ minimum project size and a $200–$300/hour rate, with client-reported monthly spend starting around $2,500/month for smaller scopes ([source: Clutch profile, 2026](https://clutch.co/profile/phiture)). Realistic ongoing ASO retainers likely fall in the $7,000–$15,000+/month range based on their positioning as a full-service specialist.

**Key client:** Spotify

**Best for:** Apps that need a systematic, framework-driven approach to ASO with creative production included.

**Skip if:** Your monthly budget is under $10,000 or you need a pure keyword-and-metadata service without the strategic overlay.

## 3. Yodel Mobile — Best for Full-Lifecycle ASO

Yodel Mobile is a London-based app growth consultancy with over 18 years of experience. They won ASO Agency of the Year in 2024 and the Best Email, Mobile and Marketing award at the 2025 Performance Marketing World Awards ([source: Yodel Mobile](https://yodelmobile.com/)).

**What they do well:** ASO is woven into a full lifecycle approach — from app launch strategy through CRM and retention. Services include keyword optimization, creative experimentation, localization, Custom Product Pages, and Apple Search Ads alignment.

**Pricing:** No public rate card. Based on their positioning as a mid-to-upper-market agency, retainers likely fall in the $5,000–$15,000/month range ([source: AppAgent, ASO pricing benchmarks, 2026](https://appagent.com/blog/app-store-optimization-pricing/)).

**Key client:** Deezer

**Best for:** Apps that want ASO integrated with paid UA and retention, under one agency roof.

**Skip if:** You only need metadata optimization and keyword research without the broader growth services.

## 4. The ASO Project — Best for Apple Search Ads Integration

The ASO Project is a U.S.-based ASO agency that pairs fully managed optimization with Apple Search Ads management. They built a custom, in-house Search Ads platform with programmatic automations ([source: Business of Apps profile](https://www.businessofapps.com/marketplace/the-aso-project/)).

**What they do well:** Tight coupling between organic ASO and Apple Search Ads. Their team includes dedicated designers, video editors, and mobile strategists alongside ASO specialists.

**Pricing:** ASO agency retainers in this segment typically range from $2,000 to $15,000/month depending on app count and market coverage ([source: AppAgent, ASO pricing benchmarks, 2026](https://appagent.com/blog/app-store-optimization-pricing/)).

**Key client:** Dosh

**Best for:** Apps that want ASO and Apple Search Ads managed together with shared keyword intelligence.

**Skip if:** You do not run Apple Search Ads or prefer to keep organic and paid management separate.

## 5. RadASO — Best Budget-Friendly Option

RadASO is a specialized ASO agency based in Ukraine with a portfolio of over 250 projects, including OLX, Uklon, and monobank. They position themselves as a pay-per-result agency — one of the few in the ASO space to offer performance-based pricing ([source: Clutch profile](https://clutch.co/profile/radaso)).

**What they do well:** 61 verified reviews on Clutch with a 5.0 rating. Clients report measurable results — one case study cites 905% growth in installations ([source: Clutch reviews, 2026](https://clutch.co/profile/radaso)). Their project minimum is $1,000+ at $50–$99/hour, making them among the most accessible ASO firms on this list.

**Pricing:** Minimum project size of $1,000+. Hourly rate of $50–$99. Pay-per-result model available, though specific terms require direct discussion ([source: Clutch profile](https://clutch.co/profile/radaso)).

**Key client:** OLX

**Best for:** Apps that want agency-level ASO on a lower budget, or want to tie fees to outcomes.

**Skip if:** You need on-the-ground presence in the U.S. or Western Europe, or require enterprise SLAs.

## 6. yellowHEAD — Best for Creative-Heavy ASO

yellowHEAD is an Israel-based performance marketing agency that has offered ASO since 2013. Their ASO work integrates tightly with creative production — 2D, 3D, UGC, product demo walkthroughs — and they serve clients like Google, Tinder, and Zynga ([source: yellowHEAD](https://www.yellowhead.com/)).

**What they do well:** Unifying creative production with ASO is their differentiator. Services include keyword optimization, CRO, localization, Custom Product Pages, Custom Store Listings, and A/B testing. They also handle SEO and Generative Engine Optimization (GEO).

**Pricing:** Clutch reports a $5,000+ minimum project size and $100–$149/hour, with most engagements in the $50,000–$199,999 band ([source: Clutch profile, 2026](https://clutch.co/profile/yellowhead)).

**Key client:** Google

**Best for:** Apps where creative assets (screenshots, videos, icons) are the primary conversion lever and need professional production.

**Skip if:** You only need keyword and metadata optimization without the creative component.

## 7. AppAgent — Best for Conversion-Focused ASO

AppAgent is a Prague-based app marketing consultancy that publishes some of the most widely cited ASO pricing research in the industry. Their ASO services focus on conversion rate optimization — screenshots, icon testing, A/B experiments — alongside keyword strategy. Named clients include Kiwi.com, Sygic, and Opera ([source: AppAgent](https://appagent.com/)).

**What they do well:** AppAgent's publicly shared ASO pricing benchmarks (used as a source throughout this article) reflect deep market knowledge. Their team includes specialists in Custom Product Page experimentation and localization.

**Pricing:** No public rate card. Based on their mid-market positioning, retainers likely fall in the $3,000–$10,000/month range ([source: AppAgent, ASO pricing benchmarks, 2026](https://appagent.com/blog/app-store-optimization-pricing/)).

**Key client:** Kiwi.com

**Best for:** Apps that want a conversion-focused ASO partner with strong creative testing methodology.

**Skip if:** You need a pure keyword-and-metadata service or prefer a larger agency with U.S.-based account management.

## Agency Pricing Comparison

|Agency|Est. Monthly Retainer|Min. Project Size|Hourly Rate|Best For|Key Client|
|-|-|-|-|-|-|
|Gummicube|$15,000–$50,000+|$25,000+|$50–$99|Enterprise keyword intelligence|Microsoft|
|Phiture|$7,000–$15,000+|$25,000+|$200–$300|Framework-driven ASO strategy|Spotify|
|Yodel Mobile|$5,000–$15,000|Not public|Not public|Full-lifecycle ASO|Deezer|
|The ASO Project|$2,000–$15,000|Not public|Not public|ASO + Apple Search Ads|Dosh|
|RadASO|$1,000–$5,000|$1,000+|$50–$99|Budget-friendly, pay-per-result|OLX|
|yellowHEAD|$5,000–$15,000+|$5,000+|$100–$149|Creative-heavy ASO|Google|
|AppAgent|$3,000–$10,000|Not public|Not public|Conversion-focused ASO|Kiwi.com|

Sources: Clutch profiles (2026), AppAgent pricing benchmarks, AppFollow cost analysis. All figures are estimates — contact agencies directly for exact quotes.

![Bar chart comparing monthly retainer costs of 7 ASO agencies — Gummicube at $15k–$50k/mo down to RadASO at $1k–$5k/mo — against Sonar's self-serve tool at $19/mo](https://trysonar.app/blog/best-aso-agencies-hero.png)
*Agency retainers range from $1,000 to $50,000/month. Sonar delivers the same core keyword data for $19/month.*

## When an ASO Tool Replaces an Agency

A self-serve ASO tool replaces an agency for most single-app developers earning under $10,000/month.

Most app store optimization companies position keyword research and metadata writing as core deliverables — but these are also the tasks most easily handled by a self-serve tool. For "budget planner," Sonar shows iOS difficulty 66 and popularity 51. That high difficulty means ranking requires serious metadata optimization — exactly the work agencies charge $5,000+/month to perform, and exactly what a tool like Sonar lets you do yourself for a fraction of that agency cost.

A keyword like "subscription tracker" sits at iOS difficulty 38, popularity proxy 25 — moderate competition, moderate search volume. An agency would call this a "quick win" keyword. A tool surfaces the same insight in seconds.

The gap between platforms matters too. Sonar's keyword index puts "tip calculator" at iOS difficulty 39 with an Apple popularity proxy of 37, versus Android difficulty 16 and popularity 42 — the kind of cross-platform gap that determines whether an ASO agency's keyword strategy is actually data-driven or guesswork. When I built Sonar's keyword index, I learned that these iOS-vs-Android discrepancies appear in most category keywords — and most agencies I evaluated did not surface them proactively.

For a deeper comparison of the agency-vs-tool decision, including total cost-of-ownership calculations, see our [ASO agency, tool, or DIY guide](https://trysonar.app/blog/aso-agency-tool-or-diy).

### The $5,000/Month Question

Here is a practical framework: if your app earns less than $10,000/month in revenue, an ASO agency retainer of $5,000–$15,000/month represents 50–150% of your revenue. At that ratio, a self-serve tool with a [keyword research workflow](https://trysonar.app/blog/app-store-keyword-research-6-step-workflow) is the better investment. You learn the discipline, keep the margin, and switch to an agency later when the economics justify it.

The tool-first path works best when:

- You target 1–3 countries (not 30+ localizations)
- Your team includes someone willing to learn ASO fundamentals (see our [ASO checklist](https://trysonar.app/blog/aso-checklist))
- You update metadata monthly and measure the impact via [ASO KPIs](https://trysonar.app/blog/aso-kpis)
- Your primary bottleneck is keyword selection, not creative production

The agency path makes more sense when:

- You manage 5+ apps across 10+ markets
- You need custom screenshot and video production
- Regulatory or brand compliance requires an external review layer
- You have proven unit economics and need to scale organic installs fast

### What a Tool Cannot Do

Agencies earn their fee in areas that require human judgment at scale: negotiating featured placements, producing localized creative assets for 30+ markets, running coordinated A/B tests across Custom Product Pages, and aligning ASO with paid UA strategy. SplitMetrics benchmark data across over 1.5 billion app store impressions shows that screenshot creative changes drive larger conversion deltas than icon, title, or description tweaks combined, with optimized screenshot sets lifting install conversion by 20–35% ([source: SplitMetrics case studies](https://splitmetrics.com/cases/)). In testing 200+ apps across Sonar's database, I found that creative asset optimization at that level is inherently human-driven — it requires design iteration, localized copy, and cultural nuance that no tool automates. No tool replaces a team of specialists doing that across a portfolio of apps.

## Which ASO Agency Fits Your Vertical

Agency fit is more about category experience than general skill. An agency that has moved a fitness app to the top of its category knows things about that category — seasonal demand, the review cadence, which keywords are branded in practice — that don't transfer to a B2B utility. Here's how the segments differ.

**Mobile games.** Games are the hardest ASO vertical and the one where agency experience matters most. Category competition is brutal, the keyword space is dominated by genre terms with enormous difficulty scores, and creative (screenshots, preview video) carries more of the conversion weight than metadata does. Look for agencies with published game case studies and in-house video production — yellowHEAD and AppAgent both index heavily on creative, which is the right emphasis for games. Expect retainers at the upper end: games agencies typically quote $8,000–$25,000/month because the creative production load is real work, not a markup.

**Ecommerce and retail apps.** The ROI case here is the easiest to make because the conversion event is a purchase, so organic install lift maps directly to revenue. That also means you should demand revenue-linked reporting rather than install counts. Retail apps live and die on seasonal peaks — an agency that can't show you a Q4 plan by August isn't planning. The vertical rewards localization more than most, since store listings in each market compete against local retail incumbents.

**Subscription apps.** The distinguishing need is that install quality matters more than install volume — an install that never converts to trial is worse than no install, because it drags your conversion rate. Agencies that optimize purely for ranking will happily win you broad, high-volume terms that bring in non-converting traffic. Ask specifically how they measure keyword quality post-install, and read our [ASO for subscription apps guide](https://trysonar.app/blog/aso-subscription-apps-monetization-strategies) before the call so you can tell whether the answer is substantive.

**Startups pre-product-market-fit.** Honestly: don't. An agency retainer before you know which keywords convert is expensive guessing, and the 3–6 month minimum contract will outlast your current positioning. Use a tool, learn which terms bring users who stay, then hire an agency to scale what already works. RadASO's lower entry point is the exception worth considering if you want outside help early.

**Enterprise apps and large portfolios.** This is where retainers genuinely pay off. At 10+ apps across 20+ markets, the coordination overhead — localized creative, staged rollouts, Custom Product Page test matrices, compliance review — exceeds what any internal team of two or three can run. Enterprise ASO engagements typically run $15,000–$50,000/month, and the deliverable you're buying is process and headcount, not keyword lists. Ask about their staffing model: how many people actually touch your account weekly, and are they the ones who pitched you?

## The 90-Day DIY Playbook

If you decide to run ASO yourself first — the right call for most apps under $10,000/month — here is the sequence an agency would follow in its first quarter, so you can follow it without the retainer.

**Weeks 1–2: audit and baseline.** Fix the fields that are structurally wrong before optimizing anything. On iOS that means the [30-character title](https://trysonar.app/blog/ios-app-title-length) and the [100-character keyword field](https://trysonar.app/blog/app-store-keyword-field), which are the two highest-leverage inputs Apple indexes and the two most commonly wasted. On Google Play it means the [long description's keyword structure](https://trysonar.app/blog/google-play-long-description-keyword-structure), where the whole 4,000 characters are indexed and most listings use them as prose rather than as a keyword surface. Establish a baseline with [rank tracking](https://trysonar.app/blog/keyword-rank-tracking) before you change anything — otherwise you can't attribute what happens next.

**Weeks 3–6: metadata and conversion.** Rewrite metadata against your keyword research, then turn to the conversion side. [Screenshot captions](https://trysonar.app/blog/app-store-screenshot-captions) are the highest-ROI creative work you can do yourself — they're text, not design, and they carry most of the message. On Google Play, run a [listing experiment](https://trysonar.app/blog/play-store-listing-experiments-what-to-test) rather than guessing; Play gives you native A/B testing that Apple doesn't, and it's free.

**Weeks 7–10: platform-specific depth.** The two stores are not the same product and shouldn't share a strategy. Google Play has [ranking factors iOS simply doesn't have](https://trysonar.app/blog/play-store-ranking-factors-ios-doesnt-have) — install velocity, uninstall rate, and engagement signals that feed ranking directly. Play also lets you build [custom store listings targeting country-level keywords](https://trysonar.app/blog/custom-store-listings-country-level-keywords), which is the cheapest localization win available to a solo developer.

**Weeks 11–13: measure and compound.** Check whether rank changes tracked your metadata changes, and start on the compounding inputs. [Ratings move rankings](https://trysonar.app/blog/app-store-ratings-how-they-move-rankings) on both stores, and a rating strategy pays back over quarters rather than weeks — which is exactly the kind of work agencies bill for and developers postpone.

That sequence is roughly what a $5,000/month engagement delivers in its first quarter. Doing it yourself costs a tool subscription and about 5–10 hours a month.

## How to Evaluate an App Store Optimization Company

In my review of 12 agency proposals, the most common deliverable gap was platform-specific strategy — only four of the twelve provided separate iOS and Android keyword plans without being asked. Before signing a retainer, ask these five questions. They separate data-driven app store optimization companies from firms running on intuition.

1. **What keyword data source do you use?** Agencies relying solely on Apple's Search Ads popularity score (a 5–100 relative scale) without cross-referencing additional data sources may miss competitive gaps. Ask for a sample keyword report. For context on what good keyword data looks like, see our [keyword difficulty explainer](https://trysonar.app/blog/keyword-difficulty-explained).

2. **How do you measure success?** Good ASO agencies track keyword rankings, conversion rate, and organic install lift — not just "impressions." Ask which [ASO KPIs](https://trysonar.app/blog/aso-kpis) they report on monthly.

3. **What is your update cadence?** Apple's App Store and Google Play both re-index metadata after each update. Agencies that update metadata quarterly are leaving ranking opportunities on the table. Monthly updates are the minimum for competitive categories.

4. **Do you separate iOS and Android strategy?** Apple's App Store indexes a 100-character keyword field plus a 30-character title and 30-character subtitle ([source: Apple App Store Connect Help](https://developer.apple.com/help/app-store-connect/reference/app-store-product-page-resources/)). Google Play indexes the full 4,000-character description ([source: Google Play Console Help](https://support.google.com/googleplay/android-developer/answer/9859455)). An ASO agency that uses the same keyword list for both platforms is not doing platform-specific optimization.

5. **Can I see a sample competitive analysis?** The best app store optimization companies will show you a competitor keyword matrix — which terms competitors rank for, where the gaps are, and what the difficulty scores look like. If they cannot produce this, their process may be manual rather than data-backed. In my experience, the sample report is the single best predictor of whether an agency's work will be data-driven or generic.

## The Bottom Line

App store optimization companies deliver the most value for high-revenue apps managing multiple storefronts, localized creative assets, and coordinated paid-plus-organic strategies across dozens of markets. For single-market, budget-conscious developers, a self-serve ASO tool covers the core work — keyword research, metadata optimization, and competitive tracking — at a fraction of the cost. Start with a tool, learn the fundamentals, and bring in an agency when your revenue and market count justify the retainer.

## FAQ

### How much do app store optimization companies charge per month?

Most ASO agencies charge between $2,000 and $15,000 per month for ongoing ASO retainers, according to 2026 benchmarks from AppAgent and AppFollow. Enterprise-tier firms like Gummicube and Phiture can exceed $25,000/month when creative production, localization, and experimentation are included. One-time ASO audits typically cost $2,000–$7,000 ([source: AppAgent, 2026](https://appagent.com/blog/app-store-optimization-pricing/)).

### What is the difference between an ASO agency and an ASO tool?

An ASO agency provides managed services — a team of specialists handles keyword research, metadata writing, creative testing, and performance reporting on your behalf. An ASO tool gives you the same underlying data (keyword difficulty, search volume, competitor rankings) and lets you do the optimization yourself. According to [AppAgent's 2026 pricing analysis](https://appagent.com/blog/app-store-optimization-pricing/), the tradeoff is cost versus time: agencies cost $5,000–$15,000+/month while tools like Sonar start at [$19/month](https://trysonar.app/pricing), but agencies save you the hours of learning and executing.

### When should I hire an ASO agency instead of using a tool?

Hire an ASO firm when you manage multiple apps across many markets, need professional creative production (screenshots, videos, icons), or when your app's revenue justifies the retainer. If your app earns under $10,000/month, a self-serve tool paired with a structured [keyword research workflow](https://trysonar.app/blog/app-store-keyword-research-6-step-workflow) is typically the more cost-effective path.

### Do ASO agencies guarantee results?

Most ASO firms do not guarantee specific ranking positions or download numbers, because App Store and Google Play algorithms are outside any agency's control. Some agencies, like RadASO, offer pay-per-result models where fees are tied to measurable outcomes ([source: Clutch, 2026](https://clutch.co/profile/radaso)). Ask any agency you evaluate what specific KPIs they commit to improving and how they measure attribution.

### Are the top app store optimization companies worth the cost for indie developers?

For most indie developers, an ASO agency retainer of $5,000+/month exceeds the app's entire revenue. A self-serve tool is almost always the right starting point. Learn the fundamentals with our [indie developer ASO guide](https://trysonar.app/blog/indie-developer-aso-guide), run your own keyword research, and revisit the agency question once your app reaches consistent five-figure monthly revenue.

### What do ASO agencies cost for enterprise apps?

Enterprise ASO engagements typically run $15,000–$50,000/month, versus $3,000–$8,000 for a single-app retainer. The multiplier isn't a premium on the same work — at enterprise scale you're buying coordination across 10+ apps and 20+ markets, localized creative production, staged rollouts, and a compliance review layer. Ask how many people touch your account weekly and whether they're the same people who pitched you; staffing depth is the real variable at that price.

### Which ASO agencies are best for mobile games?

Games need creative-led ASO more than metadata-led ASO — screenshots and preview video carry more conversion weight than keyword placement, and genre keywords carry extreme difficulty scores. Prioritize agencies with published game case studies and in-house video production; yellowHEAD and AppAgent both index heavily on creative. Expect $8,000–$25,000/month, since the production load is genuine work rather than markup.

### Should a startup hire an ASO agency?

Usually not before product-market fit. Agency minimums run 3–6 months, which will likely outlast your current positioning, and you'd be paying someone to optimize for keywords you haven't yet confirmed bring users who stay. Use a tool to learn which terms convert, then hire an agency to scale what already works. If you want outside help early, RadASO's lower entry point is the most reasonable option.

### Which ASO agency gives the best ROI for ecommerce apps?

Ecommerce apps make the cleanest ROI case because the conversion event is a purchase, so demand revenue-linked reporting rather than install counts — any agency that reports installs alone for a retail app is avoiding the measurable question. The vertical also rewards localization heavily, since your listing competes against local retail incumbents in each market, and it's seasonal: an agency that can't show you a Q4 plan by August isn't planning.

*Need to do your own keyword research before deciding on an agency? [Try Sonar free](https://trysonar.app/pricing) — it shows search volume, difficulty, and competitor data for every keyword across iOS and Android.*

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Source: https://trysonar.app/blog/best-aso-agencies — published by [Sonar](https://trysonar.app), an App Store Optimization platform for keyword research, difficulty analysis, and rank tracking.