App Store Optimization (ASO): A Practical Guide for 2026

App store optimization (ASO) is the work of making your app easy to find and easy to choose in the App Store and Google Play. Most installs for most apps still start with a search inside the store, so your listing works like a landing page that ranks. This guide covers the fields that matter, how to choose keywords, and how to improve the number of people who install after seeing your page.

Two jobs: being found and being chosen

ASO has two halves, and it helps to measure them separately:

• Visibility: does your app show up when someone searches for a term that describes what it does? This depends on your title, keywords and how well your app performs.
• Conversion: when someone sees your listing, do they install? This depends on your icon, screenshots, preview video, ratings and the first lines of your description.

A listing that ranks well but converts poorly wastes its position. A beautiful listing nobody finds is just as wasteful.

The fields each store reads

The two stores index different fields, so one copy-paste listing rarely works for both.

Field	App Store	Google Play
App name / title	30 characters, indexed	30 characters, indexed
Subtitle / short description	Subtitle, 30 characters, indexed	Short description, 80 characters, indexed
Keyword field	100 characters, hidden, indexed	None
Long description	Not used for search ranking	Up to 4,000 characters, indexed

On the App Store, the title, subtitle and keyword field do the ranking work, and the description is for people. On Google Play, there is no keyword field: the title, short description and full description are all read, so terms need to appear naturally in your text.

Choosing keywords

Good ASO keywords sit where three things meet: people search for them, they describe your app honestly, and you can realistically rank for them.

1. List the jobs your app does, in the words a user would type: "budget planner", "split bills", "track expenses". Not your internal feature names.
2. Look at how competitors describe themselves. The terms in their titles and subtitles tell you what the category searches for.
3. Use the store's search suggestions. Typing the start of a term shows what people commonly search.
4. Prefer specific over broad. A new app won't rank for "finance", but it can rank for "shared budget for couples".
5. Don't repeat words across fields on the App Store. A word in the title already counts; using it again in the keyword field wastes characters. Separate keywords with commas and no spaces.

Localise, don't just translate. The search terms people use in Turkish, Spanish or French are often not the literal translation of your English terms, and each store locale has its own fields to fill.

Writing the title and subtitle

Put your brand and your most important term in the title, for example "Splitly: Split Bills with Friends". Keep it readable; a title stuffed with keywords looks like spam and converts worse. Use the subtitle (App Store) or short description (Google Play) for the main benefit in plain words.

Screenshots do most of the selling

Most people decide from the first two or three screenshots without opening the description. Treat them as a short story:

• First screenshot: the main promise in a few words, with the screen that proves it.
• Next screenshots: one benefit each, in the order a user would care about them.
• Captions: large, short and readable on a phone. Many people never zoom in.
• Social proof: a rating, a press mention or a user count can go on a later screenshot if it's true.

Both stores let you test this. Google Play offers store listing experiments, and the App Store offers product page optimization, so you can compare icons and screenshots on real traffic instead of guessing.

Ratings, reviews and updates

Ratings affect both ranking and conversion. Ask for a rating at a good moment, after a user has completed something meaningful, using the stores' own in-app review prompts. Reply to negative reviews, especially when a fix shipped. Regular updates also signal that the app is maintained.

Measure and repeat

Check every few weeks:

• Impressions and page views from search, in App Store Connect and the Google Play Console.
• Conversion rate from page view to install.
• Rankings for your target terms.

Change one thing at a time where possible, so you know what moved the numbers. ASO is not a one-off task; competitors, search behaviour and your own app all change.

How GrowColony helps

GrowColony's ASO agent writes titles, subtitles, keyword fields and descriptions for both stores based on search intent, suggests the story your screenshots should tell, and prepares localised versions. When you connect App Store Connect or the Google Play Console, the weekly review shows how your listing performs, and every change waits for your approval first.