# App Store Optimization (ASO): a practical guide

> App Store Optimization (ASO) is the practice of improving your app's store listing so more people find it and install it. It combines keyword research, a clear title and subtitle, strong screenshots, good ratings, and ongoing testing on both Apple and Google.

Source: https://keepwarning.com/blog/app-store-optimization-guide/  
Publisher: KeepWarning (Columbia, MD)  
Topic: App marketing and growth  
Updated: October 12, 2026

## Key takeaways

- ASO has two goals: be found (keywords) and convert views into installs (visuals and messaging).
- Apple and Google index different fields, so optimize each store separately.
- Ratings, reviews, and update frequency influence both ranking and trust.
- Test listing changes and measure installs, not opinions.

Most app discovery starts with a search in the store. ASO is how you show up and persuade people to tap "Get".

## How ASO works

Think of two jobs: **visibility** (appearing for the right searches) and **conversion** (turning views into installs). Both matter. Ranking first with a weak listing wastes traffic.

## Apple App Store vs Google Play

| Element | Apple App Store | Google Play |
| --- | --- | --- |
| Title | Up to 30 characters, heavily weighted | Up to 30 characters, heavily weighted |
| Subtitle / short description | Subtitle, 30 characters | Short description, 80 characters |
| Keywords | Hidden keyword field, 100 characters | No keyword field. Keywords come from your text |
| Long description | Not indexed for search, but affects conversion | Indexed for search, up to 4,000 characters |
| Visuals | Icon, screenshots, preview video | Icon, feature graphic, screenshots, video |

Limits can change, so verify them in each store's documentation.

## An ASO checklist

1. **Research keywords** people actually search. Look at competitors, related terms, and store suggestions.
2. **Write a clear title** with your brand and your main keyword.
3. **Use the subtitle or short description** to state the benefit in plain words.
4. **Fill the keyword field (Apple)** with relevant, non-repeated words, separated by commas.
5. **Write a useful description (Google).** Use keywords naturally and explain the benefits.
6. **Design a strong icon.** It should be simple, recognizable, and distinct. Test variations.
7. **Make screenshots tell a story.** Lead with the main benefit, use short captions, and show real screens.
8. **Show localized listings** if you serve other languages or regions.
9. **Earn ratings.** Ask at a good moment, such as after a success, and reply to reviews.
10. **Update regularly.** Fresh releases signal an active app.

## Test and measure

Use **Product Page Optimization** on Apple and **Store Listing Experiments** on Google Play to test icons, screenshots, and text. Track impressions, product page views, and install conversion in your store dashboards, and connect them to your [analytics](/blog/mobile-app-analytics-for-beginners/).

## Keyword research, step by step

1. **List seed terms.** Write the words a customer would type to find your kind of app, including the problem ("split bills"), the category ("expense tracker"), and competitors' names.
2. **Collect suggestions.** Type your seeds into the store search bars and note the autocomplete suggestions, which reflect real searches.
3. **Study competitors.** Read the titles, subtitles, and descriptions of the top apps for each term. Which words do they use repeatedly?
4. **Score each keyword** on three things: relevance to your app, search popularity, and competition. ASO tools estimate popularity and difficulty.
5. **Choose a primary keyword** for the title and a set of supporting keywords for the subtitle or short description and, on Apple, the hidden keyword field.
6. **Avoid repeats.** On Apple, words in your title and subtitle do not need to be repeated in the keyword field. Use the space for new terms.
7. **Re-check every quarter.** Search behavior and competitors change.

## Writing a title and subtitle that work

| Weak | Better | Why |
| --- | --- | --- |
| "SplitPay" | "SplitPay: Split Bills & Expenses" | Adds the benefit and searchable words |
| "Best app for everything" | "Fitly: Home Workouts & Plans" | Specific, believable, keyword-rich |
| All caps and symbols | Clean, readable text | Stores penalize spammy titles and users distrust them |

Do not stuff keywords or use competitor names you do not own. Stores can reject or demote listings that do.

## Screenshots that convert

- **Lead with the main benefit,** not a login screen.
- Use **short captions** that a skimmer can read in two seconds.
- Show **real interface** with believable data.
- Put the **strongest three screenshots first,** because many people do not scroll.
- Test a **video preview** for apps that benefit from motion.
- Localize screenshots for important markets.

## Ratings and reviews

Both stores weigh ratings and recent reviews. Ask for a rating **after a success moment** (not at launch or after an error), use the platform's native rating prompt, and reply politely to reviews, especially negative ones, once you have fixed the problem. A higher rating improves conversion as well as ranking.

## What to measure

| Metric | Meaning | If it is low |
| --- | --- | --- |
| Impressions | How often your app appears in search and browse | Improve keywords and ranking |
| Product page views | People who tapped through | Improve icon, title, and subtitle |
| Conversion rate | Views that became installs | Improve screenshots, description, rating |
| Keyword rankings | Position for target terms | Adjust metadata, earn more ratings |
| Retention | Users who stay | Not ASO: fix the product. See [retention](/blog/reduce-app-uninstalls-and-boost-retention/) |

Change **one thing at a time** where you can, so you know what caused the result.

## ASO is not the whole plan

ASO captures people already searching. To reach everyone else, combine it with [app promotion](/blog/how-to-promote-a-mobile-app/), content, and paid campaigns. If you have not launched yet, see [how to publish your app](/blog/how-to-publish-an-app-on-the-app-store-and-google-play/).

## Frequently asked questions

### What is ASO?

App Store Optimization is the process of improving an app's visibility and conversion rate in the App Store and Google Play, similar to SEO for websites.

### How is Apple ASO different from Google Play ASO?

Apple uses the title, subtitle, and a hidden keyword field. Google Play indexes the title, short description, and full description. Each store needs its own keyword strategy.

### How long does ASO take to work?

Small changes can shift rankings within days or weeks, but steady growth takes months of testing, review management, and updates.

### Do ratings affect ASO?

Yes. Ratings and reviews influence both ranking and the likelihood that people install, so ask happy users to rate and respond to feedback.