AppTweak is the best all-round ASO tool for teams on both stores, Astro is the pick for solo iOS developers, and the listing tests built into the App Store and Google Play cost nothing. The list is grouped by job. The full field is in the ASO tools directory.
| Tool | Best for | Job | Stores | Price |
|---|
 AppTweak | Keyword research for teams | Keywords | App Store, Google Play | From $79/mo |
 MobileAction | Keywords next to Apple Ads data | Keywords | App Store, Google Play | From $15/mo |
 Astro | Solo iOS developers | Keywords | App Store | $9/mo, billed yearly |
 Sensor Tower | Studying competitor apps | Competitor data | App Store, Google Play | Free plan |
 AppFollow | Replying to reviews | Reviews | App Store, Google Play | Free plan |
 Product Page Optimization | Testing icons and screenshots | Listing tests | App Store | Free |
 Google Play store listing experiments | Testing graphics and text | Listing tests | Google Play | Free |
 AppScreens | Localized screenshot sets | Screenshots | App Store, Google Play | Free plan, paid from $8.25/mo |
 Itsyconnect | Editing listing text in every locale | Localization | App Store | Free |
 Apple Ads keyword popularity | Apple's own popularity scores | Keywords | App Store | Free |
 ActivationPal keyword checker | Quick free keyword checks | Keywords | App Store | Free, ActivationPal plans from $9/mo |
 Appfigures | Your own downloads and revenue | Store analytics | App Store, Google Play | Free plan, paid from $7.99/mo |
1. AppTweak
Best for: teams that research keywords on both stores.
AppTweak keeps keyword volume history for the App Store and Google Play, draws on a database of more than 30 million keywords in 100+ countries, and shows competitor metadata and creatives in one view. Plans start at $79/mo for 5 apps and 500 keywords, with a 7-day free trial.
2. MobileAction
Best for: teams that run Apple Ads and ASO together.
MobileAction pairs keyword research and rank tracking with Apple Ads data. The Lite plan costs $15/mo for 100 keywords, 5 apps and 3 competitors per app, with a 7-day free trial. Its Apple Ads campaign manager has a free plan for advertisers spending up to $10,000 a month.
3. Astro
Best for: solo iOS developers who want keyword data without a team-sized bill.
Astro is a Mac app that shows popularity and difficulty for keywords, using popularity data from Apple Search Ads. It tracks rankings daily, suggests keywords, including ones your competitors rank for, and covers 60+ stores. It costs $9/mo billed yearly, with unlimited keywords. It does not cover Google Play.
4. Sensor Tower
Best for: studying how competitor apps perform.
Sensor Tower reports downloads, revenue, keyword rankings, ratings and reviews for apps on both stores, and extends to advertising and web insights. Sign-up is free. It suits market research more than day-to-day keyword edits on your own listing.
5. AppFollow
Best for: teams that answer reviews and watch ratings.
AppFollow brings review replies, tagging and rating tracking together with ASO in one place, for both stores. It has a free plan, which makes it an easy first step before you add a dedicated keyword tool.
6. Product Page Optimization
Best for: testing App Store icons, screenshots and previews at no cost.
Product Page Optimization runs alternate versions of your icon, screenshots and preview videos on the live App Store, so you see which version converts. Apple provides it free in App Store Connect. It works on iOS only.
7. Google Play store listing experiments
Best for: testing Google Play graphics and text on real traffic.
Store listing experiments in Play Console compare changes to your listing graphics and text against the current version. Google provides them free. They work on Android only, so pair them with Product Page Optimization if you ship on both stores.
8. AppScreens
Best for: teams shipping localized screenshots in many languages.
AppScreens builds screenshot sets for both stores, localizes them and uploads them straight to App Store Connect and Google Play Console. It has a free plan, and paid plans start at $8.25/mo.
9. Itsyconnect
Best for: iOS teams that edit and translate listing text across many locales.
Itsyconnect edits App Store metadata across all locales in one place and uses your own AI key for translation. It is free and covers the App Store only.
10. Apple Ads keyword popularity
Best for: checking real App Store search demand from the source.
Apple Ads gives you Apple's own search popularity scores and keyword suggestions for the App Store, at no cost. Astro and AppTweak both pull their App Store popularity from Apple, so the free source is worth a look before you pay for a wrapper.
11. ActivationPal keyword checker
Best for: a quick free check of an App Store keyword before you commit to a paid tool.
This site makes ActivationPal, and the keyword checker is a small tool, not a full ASO suite.
- Popularity and difficulty for any keyword in 175 countries, with no sign-in.
- The top ranking apps and related keywords to check next.
Popularity is a 0 to 10 score for comparing keywords, not a search count, and it covers the App Store only. For tracking positions over time, see App Store rank trackers.
12. Appfigures
Best for: tracking your own apps' downloads, revenue, rankings and reviews in one place.
Appfigures covers both stores and reports on the apps you own rather than on the whole market. It has a free plan, and paid plans start at $7.99/mo.
How to choose an ASO tool
- Pick by job. Keyword tools find the terms to target. Listing tests show whether a new icon or screenshot converts. Screenshot and localization tools produce the creatives. Review tools handle replies.
- Pick by store. Astro, Product Page Optimization, Itsyconnect and Apple Ads keyword popularity are iOS only. Store listing experiments are Android only. See the lists for App Store ASO tools and Google Play ASO tools.
- Pick by team size. A solo developer can run on Astro plus the free store tests. A funded team that needs history, many competitors and several seats should look at AppTweak or MobileAction.
What to measure after the install
ASO tools stop at the store page. ActivationPal tracks what installs do next: onboarding steps, paywall views and purchases, from SDKs for iOS, Android, Flutter and React Native.