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A free ASO keyword tool
What the free plan includes, what Pro adds, and how both compare with the free options elsewhere.
ASOTool is free to use. A free account researches keywords the same way the paid plan does — the same popularity, the same difficulty, the same top ten — with a daily allowance instead of a bill. Two parts need no account at all: the audit, which reads your live listing and marks the keywords you could reach, and the keyword pages, which publish what the store looked like for a term on the day it was read.
What the free plan includes
| Free | |
|---|---|
| Searches | 10 a day — each one a seed keyword expanded into everything the store suggests around it, every term scored |
| Apps | 1, with its live listing read and the keywords it already ranks for marked |
| Saved keywords | 10, with their rank read daily, the history kept, and an email the day one moves |
| Competitors | 2, with the keywords their names target and where they rank against you |
| Stores | App Store and Google Play, every storefront |
| No account | The audit, the keyword pages and the guides |
No card, and no expiry: the free plan is not a trial that runs out. The searches reset at midnight UTC.
What Pro adds
$12.99 a month, including VAT, with the first seven days free: unlimited searches, apps, keywords and competitors, Optimize as often as you like, and team workspaces. Cancelling inside the seven days costs nothing, and dropping back to free keeps everything you measured.
The line between the two is deliberate. Free is enough to research one app properly and find out whether the numbers are any good; Pro is for watching a whole list move every day, or several apps at once.
Where the numbers come from
A tool is only worth using if its numbers are. Each figure in ASOTool says what it is:
- Popularity is Apple's own figure wherever Apple publishes one — the search popularity score it exposes through Apple Search Ads. Where Apple publishes nothing, the number is estimated from the store's autocomplete and marked with a ~. Google Play publishes no search volume at all, so every Play figure is an estimate, and says so. How App Store search volume works goes into what Apple's number is and is not.
- Difficulty is read off the apps ranking in the top ten today — how many ratings they carry, and whether their names carry the keyword at all — not assigned from a table. It measures taking any place in the ten, not beating whoever is first.
- Rank is read from the live result page, in the storefront you pick, on the days a reading was taken. Days without a reading are left blank rather than drawn in.
How the three combine into a keyword worth using is in choosing keywords you can rank for.
How it compares with the free options elsewhere
Most ASO tools are sold as subscriptions, and what they offer for free is a trial or a single lookup:
- AppTweak offers a free keyword suggestion tool. Its plans start at €79 a month after a 7-day trial. Compared in detail.
- Appfigures has a free plan. Daily keyword rank tracking starts with its Monitor plan at $44.99 a month ($35.99 billed yearly), for 100 keywords. Compared in detail.
- Astro is $9 a month with no free tier — it offers a 14-day refund instead — and runs as a Mac app covering the App Store only. Compared in detail.
- A number of sites offer free one-off lookups — type a keyword, see a score. Useful for a quick check; none of them remember the keyword or tell you when your rank moves. The audit is our version of that, and it reads your whole listing rather than one term.
Prices and plans as listed on each company's own pricing page in September 2026. They change; check theirs before deciding.
The most searched keywords we track
VPN - Super Unlimited Proxy
Bible
Weather
Chess.com - Play and Learn
Imposter Game - Party Edition
Picsart AI Photo Editor, Video
Every one of them is on the keyword index.