App Store Optimization (ASO): Title and Description Character Guide
ASO (App Store Optimization) is the process of improving your app's visibility in app store search results to increase downloads. Like SEO for websites, keyword optimization in titles and descriptions plays a crucial role. App Store and Google Play have different character limits, so understanding each platform's specifications is essential.
App Store Character Limits
| Element | App Store (iOS) | Google Play |
|---|---|---|
| App Name | 30 characters | 30 characters |
| Subtitle | 30 characters | N/A |
| Short Description | N/A | 80 characters |
| Description | 4,000 characters | 4,000 characters |
| Keyword Field | 100 characters | N/A (auto-extracted from description) |
| Promotional Text | 170 characters | N/A |
| Release Notes | 4,000 characters | 500 characters |
Title Optimization
The app name is the most important ASO element. Within the 30-character limit, aim to include both your brand name and primary keywords. Place the brand name first, followed by a separator and keywords. On the App Store, the subtitle is also indexed for search, so use it for keywords that don't fit in the title.
Description Writing Tips
While descriptions can be up to 4,000 characters, users typically read only the first few lines. On the App Store, the first 3 lines (about 170 characters) are visible before "Read More." Front-load your app's core value proposition in this space. On Google Play, description keywords influence search indexing, so naturally incorporate important keywords throughout.
Common Mistakes
- Mixing spaces and commas in the iOS keyword field — Apple requires comma-separated keywords only
- Writing only feature lists in the first 170 characters — lead with user benefits instead
Conclusion
ASO success depends on effective keyword placement within the 30-character app name and 4,000-character description limits. Optimize separately for each platform. Use Character Counter to verify your title and subtitle lengths before publishing.