ASO character counter for the App Store and Google Play

App StoreGoogle Play

App name

The field that matters most in search: your main keyword goes here.

0 / 30 characters

Subtitle

Don't repeat words from the name.

0 / 30 characters

Keyword field

Comma-separated, no spaces. Apple measures it in bytes, not characters.

0 / 100 bytes0 characters

Promotional text

You can change it without submitting a new version.

0 / 170 characters

Description

Plain text, no HTML.

0 / 4000 characters

Your app nameYour subtitle

A neutral approximation of a search result: each store and each device truncates differently.

Green: within the limit. Amber: an indexed field with lots of unused space. Red: over the limit.

Copy allClear

Everything runs in your browser: nothing you type is stored or sent anywhere.

How to use the ASO character counter

Pick a store tab, App Store or Google Play, and paste your listing copy. Each field has its own counter and progress bar: green when you're within the limit, amber when a field that counts for search has a lot of unused space, and red when you go over.

In the App Store keyword field I count bytes and characters side by side, and flag four things: spaces after commas, words repeated inside the field, words already in your app name or subtitle, and simple plurals of a keyword you already have. On Google Play you get the 10 most repeated words in your full description, with their percentage.

When you're done, "Copy all" copies every field as labeled plain text, ready to paste into App Store Connect or Play Console. It all runs in your browser: nothing you type is stored or sent anywhere.

What each field means and its limit

These are the limits in Apple's and Google's official documentation, checked on 17 October 2026:

Sources: for the app name and subtitle, App Store Connect Help on app information; for keywords, promotional text, description and What's New, the page on platform version information; for Google Play, Play Console Help.

Why the keyword field is measured in bytes

App Store character limits don't work the same way in every field: the keyword field is measured in bytes. That's what App Store Connect says, even though Apple's App Store search guide mentions 100 characters. I go with the App Store Connect figure, since that's where the field is validated, and I count bytes as UTF-8, which is how it behaves in practice.

What difference does it make? In English, a plain letter takes 1 byte and an accented one, like é, takes 2. But every Chinese, Japanese or Korean character takes 3 bytes, so only about 33 fit. When I launched my app Ferro with metadata in 30 languages, that gap meant choosing different keywords for each market: translating the list isn't enough.

Google Play: title and descriptions

The Google Play character limit for the title is 30, the same as on iOS, and Google counts full-width and half-width characters the same way. The big difference is the full description: on Google Play it carries far more weight for long-tail keywords, and 4,000 characters gives you a lot to work with.

My rules for filling in metadata

1. The main keyword always goes in the title. Your category term, or the one you absolutely have to rank for.
2. On iOS, I never repeat keywords across the title, subtitle and keyword field. Repeating a word in two fields doesn't buy you more visibility; it just takes room from another keyword. Apple itself advises against repeating words from your app name, subtitle or category, and treats singular and plural as duplicates.
3. On Google Play, I put real work into the full description. That's where long-tail keywords go. But write naturally: Google warns that repetitive or irrelevant keyword use in your app name or description can get your app suspended. That's what the density table is for: if one word spikes, rewrite the sentence.
4. No competitor brands in your metadata or keyword field. Apple doesn't allow the names of other apps or companies.

If you'd rather I handle it, here's how I work on App Store ASO and Google Play ASO.

Common mistakes I see on store listings

• Leaving characters on the table. An 18-character subtitle or a keyword field at 70 bytes is visibility you're giving away. That's why the counter marks unused space in amber.
• Missing keywords. The main keyword left out of the title, or a keyword field filled in on launch day and never touched again.
• Spaces after commas. Each one costs a byte and adds nothing.
• Duplicates. The same word in the app name and the keyword field, or "game" and "games" together.
• Expecting results within a week. After changing your metadata, allow at least a month and a half to see results on the App Store, and at least 3 months on Google Play.