Every ASO Tool's Free Trial, Compared
Most ASO tools offer some way to try before paying, but "free" means four different things across this market: a timed trial, a permanent free tier, a free download, or a demo call. Here's what each vendor actually gives you, from their public pages in July 2026:
| Tool | Trial | Free tier | Card required | Entry price after |
|---|---|---|---|---|
| Sonar | 7 days, full access | Free tools, no account | Yes | $19/mo |
| AppTweak | 7 days | No | Check at signup | $79/mo |
| App Radar | 7 days | Yes | Check at signup | €69/mo |
| MobileAction | 7 days (Basic/Pro only) | Free Apple Ads tool | Yes, to start trial | $15/mo |
| ASOMobile | 3 days | Yes — 20 keywords, 2 apps | No, for free tier | $59/mo |
| Astro | Free download | No | No | $9/mo annual |
| FoxData | 7 days | No | Check at signup | $9.90/mo |
| Sensor Tower | No trial | No | — | Not published |
Two takeaways. Seven days is the category standard — ASOMobile's three days is the outlier on the short end. And the most expensive tool on the list has no trial at all: Sensor Tower requires a sales call and an annual contract, with no self-serve path to trying it.
Free Trial vs Free Tier — They Solve Different Problems
This distinction matters more than trial length, and most comparison articles blur it.
A timed trial gives you the full product for a fixed window. Good for evaluating depth: can this tool do the specific thing I need? Bad for evaluating data quality over time, because seven days isn't long enough to watch a ranking move in response to a metadata change.
A permanent free tier gives you a slice of the product forever. Bad for evaluating depth — you're seeing a fenced version. Good for the thing trials can't do: leaving it running for a month and checking whether the ranks it reports match what you see in the store.
If you're serious about evaluating, use both. Start on a free tier (App Radar, ASOMobile, or Sonar's free tools), let it collect for a few weeks, then burn a 7-day trial on the tool that survived that check — with a specific question you want answered.
What a 3-day trial can honestly tell you: whether the UI makes sense and whether the keyword data looks plausible. Not much else. ASOMobile's permanent free tier is the better evaluation route for that tool.
The Credit Card Question
Some trials require a card upfront, some don't. It's worth knowing which before you start, because a card-required trial converts to a paid subscription automatically at the end of the window.
Sonar requires a card for its 7-day trial. I'll defend that choice honestly: it's a Stripe-managed trial, cancelling takes one click in settings, and requiring a card means the trial population is people actually evaluating the tool rather than harvesting free lookups. But if you specifically want to avoid entering a card, Sonar's free tools — the ASO score checker and keyword generator — work with no account at all, and the free API tier gives you six stateless endpoints with no key required.
ASOMobile's free plan requires no card. Same for Astro's free download.
For everything else, check at signup — vendors change this more often than they change prices.
What to Actually Test During a Trial
Seven days goes quickly. From having watched a lot of people evaluate ASO tools, the ones who choose well test these four things and ignore the feature list:
1. Does the keyword data match reality? Pick five keywords you already rank for and check the tool's reported rank against what you see searching the store manually on a clean device. Every ASO tool estimates; the question is how far off, and in which direction.
2. Is the popularity metric real or inferred? iOS search popularity comes from Apple, and tools differ enormously in whether they have it, approximate it, or quietly interpolate it. Ask where the number comes from. Our Apple search popularity explainer covers what the scale actually means.
3. Does it cover your countries? Most tools advertise 60–100+ countries, but data density in smaller markets varies wildly. Test the markets you actually sell in, not the US.
4. Can you get the data out? Export, API, or CLI. This is the one people skip and regret. If the tool can't hand you a CSV or answer an API call, every future workflow runs through its dashboard.
Also worth doing: count your keywords honestly before the trial ends. Most entry tiers cap at 500, and one app across three countries plus two competitors will exceed that. Discovering the cap after you've subscribed is the most common upgrade trigger in this market — see the tier tables in our AppTweak, App Radar, and MobileAction pricing breakdowns.
Free Tools That Need No Trial At All
If you just have a question — not a workflow — several things are free and permanent:
- Sonar's ASO score checker — audit any app's listing, no account.
- Sonar's keyword generator — keyword ideas from an app's metadata, no account.
- Sonar's free API tier — six stateless endpoints (app search, lookup, ASO score, keyword extraction, suggestions, and metrics) with no API key, rate-limited per IP.
- MobileAction's Apple Ads CMP — free up to $10,000/month in managed ad spend.
- ASOMobile's free plan — 20 keywords, 2 apps, permanent.
- App Radar's free tier — documented on its pricing page.
For a one-off question like "how hard is this keyword," a free tool answers it faster than any trial signup.
About Sonar's Trial
Since you'll want to know: Sonar is 7 days, full access, credit card required, cancel anytime from settings. Everything is unlocked during the trial — unlimited apps, unlimited keywords, all countries, full history, plus the API, CLI, and MCP server. There is no crippled trial tier, because the whole product is one tier.
After the trial it's $19/month or $149/year. Those are intro prices through August 31, 2026; they're going up afterward, and anyone who subscribes before then keeps the price they signed up at.
If you'd rather not start a trial at all, the free tools above and the keyless API tier will answer most first questions.
Frequently Asked Questions
Q: Which ASO tools have a free trial?
A: AppTweak, App Radar, MobileAction, and Sonar all offer 7-day trials. ASOMobile offers 3 days. Astro offers a free download rather than a timed trial. Sensor Tower has no trial — it requires a sales call and an annual contract.
Q: Which ASO tools have a permanent free tier?
A: App Radar and ASOMobile (20 keywords, 2 apps) both have permanent free tiers. MobileAction's Apple Ads campaign tool is free up to $10,000/month in ad spend. Sonar's free tools — ASO score checker and keyword generator — and its keyless API tier work without an account, though the full product is trial-then-paid.
Q: Is there an ASO tool with a free trial and no credit card?
A: ASOMobile's free plan requires no card, and Astro's trial is a plain download. For the rest, check at signup — most card-required trials are Stripe-managed and cancel in one click, but the requirement varies by vendor and changes over time.
Q: How long is Sonar's free trial?
A: Seven days with full access to everything — unlimited apps and keywords, all countries, full history, API, CLI, and MCP. A credit card is required (it's a Stripe-managed trial) and you can cancel from settings at any point. After the trial it's $19/month or $149/year.
Q: Does Sensor Tower have a free trial?
A: No. Sensor Tower has no self-serve signup, no free tier, and no free trial — every engagement starts with a sales conversation and an annual contract. See our Sensor Tower pricing breakdown for what that typically costs.
Q: What should I test during an ASO tool trial?
A: Four things: whether reported ranks match what you see searching the store manually, where the popularity metric comes from, whether the countries you sell in have dense data, and whether you can export or API your way out. Feature lists all look the same; data accuracy and data portability are what differ.
Q: Can I try an ASO tool without signing up at all?
A: Yes. Sonar's ASO score checker and keyword generator run without an account, and the free API tier answers six stateless endpoints with no key. That's enough to audit a listing or check a keyword's difficulty without giving anyone an email address.