# Test your title, subtitle and keyword field before you publish

Source: https://asorocket.app/features/metadata-lab

Type a draft and watch the score change with every keystroke. The pressure test catches what App Review rejects and what quietly costs you rankings, including keywords you rank for today that the draft would stop covering.

## What it does

### A score that updates as you type

How much of your tracked keywords’ search demand the title, subtitle and keyword field cover, weighted by popularity and by how reachable each keyword is for your app.

### Compared with your live listing

Every draft is scored against what is live now, so you know whether a change helps before you submit it.

### Fill keyword field

Packs the most valuable missing words into the 100 characters, without repeating words already in your title and subtitle.

### Pressure test

Limits, wasted characters, repeated and filler words, plural duplicates, prices, claims like “best” or “#1”, emoji and competitors’ brand names.

### Ranking-loss warnings

Flags keywords you rank for in the top 50 today whose words a draft would drop, before you lose them.

### Google Play listings too

For a Google Play app the lab drafts the title (30 characters), short description (80) and description (4,000), scores all three, and checks them by Google Play’s rules: claims, prices, emoji and capitals, competitors’ brands, a thin description, and a word repeated until it reads as stuffing.

### Publish when it’s ready

Load your live and in-preparation listing from App Store Connect, then [publish](https://asorocket.app/features/publish-to-app-store-connect) a checked draft into the version you’re preparing, and [plan the other localizations](https://asorocket.app/features/localization-planner) your storefronts index. Google Play drafts go to [Google Play Console](https://asorocket.app/features/google-play-console).

## Good to know

### Not a rank prediction

Neither store’s ranking algorithm is public. The score measures coverage of your target keywords, which is the part of ASO you control in the indexed fields.

### Different fields, different rules

Google Play has no hidden keyword field and reads the description for search, so its words count where the keyword field does on the App Store, at a lower weight. Fill keyword field and the localization planner are for App Store apps. The checks’ thresholds for Google Play are asorocket’s judgement, not figures Google publishes.

### The apps you can edit

With App Store Connect or Google Play Console connected, the lab lists the apps in that store your account can edit. For a store without a connection it lists every app you follow there.

## Related guides

- [How to use the App Store keyword field](https://asorocket.app/guides/app-store-keyword-field)
- [App Store title and subtitle: limits and how to write them](https://asorocket.app/guides/app-name-and-subtitle)
- [Google Play title, short description and description: limits and how to write them](https://asorocket.app/guides/google-play-title-and-descriptions)
- [ASO checklist: what to check before you submit an App Store update](https://asorocket.app/guides/aso-checklist)