Free ASO keyword tool

How to use it

1. 1

   Find your app

   Search for your app by name, or paste its App Store or Google Play URL. The tool pulls the live listing directly from the store.

2. 2

   Review keyword coverage

   See which terms your current metadata targets, and how much of each field's character budget is actually being used.

3. 3

   Check the gaps

   The report flags relevant terms your listing does not cover and fields that are under-filled or duplicating terms already used elsewhere.

4. 4

   Apply the changes

   Rewrite your title, subtitle and description against the gaps, then re-run the check after the store re-indexes to confirm the coverage improved.

What the tool checks

Because the two stores index different fields, the same listing scores differently on each. The tool applies each store's rules separately rather than reporting a single blended number that would be wrong for both.

A worked example

A mid-market habit tracker came in with the title "Habitly" (7 of 30 characters used) and the subtitle "Build better habits" (19 of 30). Between the two indexed fields it was using 26 of a possible 60 characters — 57% of its highest-weighted keyword real estate was empty. The keyword field repeated "habit" and "habits", which Apple already had from the title, wasting a further 12 characters on terms it was guaranteed to index anyway.

The rewrite kept the brand first and filled the rest with terms the category actually searches: "Habitly: Habit & Goal Tracker" (29/30) and "Daily Routine, Streaks & Focus" (30/30). The keyword field dropped every duplicate and picked up distinct adjacent terms. Coverage of the target keyword set went from 4 of 18 terms to 13 of 18, with no new words invented — the terms were already relevant, the listing simply had not said them anywhere Apple indexes.

The pattern repeats across almost every listing this tool sees: the problem is rarely the wrong keywords, it is unused character budget and the same term repeated across three fields that each index independently.

Indexed field reference

The character budgets below are the ones the tool measures against. They are the App Store and Google Play limits as of 2026 and are worth knowing by heart, because every coverage question reduces to whether a term appears somewhere in this table.

Apple gives an iOS listing 160 indexed characters across title, subtitle and keyword field. Google gives an Android listing 4,110 across title, short description and long description, but weights the title far above the rest. That asymmetry is why the same metadata cannot be reused across both stores unchanged.

What it does not do

Being straight about the boundaries: this is a coverage and structure check, not a rank tracker. It tells you what your listing targets today and where the obvious waste is. It does not track your position over time, estimate competitor downloads, or forecast the install impact of a change.

• No historical rank tracking — use a paid platform if you need trend data.
• Search volume estimates are directional; no vendor has real store search volume.
• Limited to one free check per day per device so the tool stays available.