App Store Listing Copy Builder

Write an App Store or Google Play listing with title, subtitle, and description

Creates iOS and Android store listing copy with a keyword-optimized title, subtitle, short and long description, and up to five keyword fields — and live character counters that respect App Store and Google Play limits. It runs free in your browser on Gera Tools, with nothing uploaded.

Last updated Source: Gera Tools

What is app store optimization (ASO)?

ASO is the practice of improving an app's store listing so it ranks higher in search and converts more visitors into installs. The biggest levers are the title, subtitle, keyword field, and the first lines of the description — exactly what this builder structures.

A listing built for ranking and installs

Your app store listing is both an ad and a search result. The title, subtitle, and keyword field decide whether you rank for the searches users type, while the description and first visible lines decide whether they tap install. This builder assembles a complete, platform-correct listing — title, subtitle, short and long descriptions, and a keyword field — with live character counters so every field stays within Apple or Google’s limits.

How it works

You enter your app name, its one-line value, key features, and target keywords. The tool then:

  • Builds a title and subtitle that lead with your value and weave in a keyword.
  • Generates a short description (the promotional line) and a benefit-led long description with a feature list and call to action.
  • Packs your keywords into a comma-separated keyword field for iOS, trimmed to 100 characters.
  • Switches character limits and field structure when you toggle between App Store and Google Play.

Every field shows a live counter that turns to a warning state if you exceed the store’s limit. All of this runs in your browser.

Character limits at a glance

FieldApple App StoreGoogle Play
Title30 characters30 characters
Subtitle / short description30 characters80 characters
Keyword field100 charactersNone (indexed from descriptions)
Full description4,000 characters4,000 characters

The builder switches the field layout and counters when you pick your target platform.

Keyword strategy by platform

Apple App Store has a dedicated keyword field separate from the description. Indexing weight is roughly: title > subtitle > keyword field > developer name. Best practices:

  • Never repeat words from the title or subtitle in the keyword field — they are already indexed.
  • Use singular forms; the store handles plurals automatically.
  • Omit spaces after commas to fit more terms in the 100-character limit.
  • Include competitor app names only if they are genuinely relevant; Apple can reject listings for abusive keyword targeting.

Google Play has no keyword field. Instead it indexes the short description and full description. Best practices:

  • Include your 3–5 target keywords naturally in the short description (it carries more weight relative to its length).
  • Repeat important keywords a few times in the full description without stuffing — Google’s algorithm understands context.
  • Use the full 4,000-character description; longer descriptions give more signal and more space to convert users.

Tips for a stronger listing

  • Put your single most-searched keyword in the title, since it carries the most ranking weight on both stores.
  • Use the subtitle (iOS) or short description (Android) to add a second benefit and a second keyword rather than repeating the title.
  • Front-load the description with the benefit and a call to action — most users never tap “more.”
  • A/B test screenshots and icons alongside copy changes; conversion rate often moves more with visuals than with text rewrites.