How to Write an App Store Description That Ranks

Your App Store description does two jobs at once: it has to rank for the terms people search, and it has to convince the people who find it to tap Get. Most first-time developers write it like a press release and lose on both. The good news is that the rules are knowable, and once your app is built you can get the listing right in an afternoon. Here is how to write a description that ranks and converts.

Understand what the App Store actually indexes

App Store Optimization is not the same as Google SEO. On the App Store, the fields that carry the most ranking weight are the app name (up to 30 characters), the subtitle (30 characters), and the keyword field (a hidden 100-character comma-separated list you set in App Store Connect). Apple’s own App Store Connect help documents these fields. The long description, surprisingly, is not indexed for search on the Apple App Store, though it is on Google Play. So the description’s job on iOS is pure conversion, while the name, subtitle, and keyword field do the ranking.

If you built your app with an AI builder, you likely spent your energy on the product, not the listing. Treat the listing as its own task, the same way you treat shipping in how to ship an iOS app to the App Store fast.

Put the keyword in the name, the angle in the subtitle

Your app name should pair your brand with the single most important keyword: “Lumen: Habit Tracker” beats “Lumen” alone, because “habit tracker” is what people search. The subtitle is your one line to add a second keyword and a benefit: “Build streaks that actually stick.” Do not waste either on vague adjectives. Apple’s product page guidance is clear that clarity beats cleverness.

For the 100-character keyword field: use single words, separated by commas, no spaces, no repeats of words already in your name or subtitle (that is wasted space), and no plurals if the singular is there (Apple matches both). Fill all 100 characters.

What each field actually does

The name, subtitle, and keyword field do the ranking; the description converts. Treat them differently.

Field	What it does	Optimize for
App name	Ranks and brands	Your single top keyword
Subtitle	Ranks and clarifies	The angle, a second keyword
Keyword field	Ranks (hidden)	Comma-separated terms, no spaces
Description	Converts, not ranks	Humans: lead with the benefit

Write the first three lines for humans

Only the first two or three lines of your description show before the “more” cut. That is your real estate. Lead with the outcome the user wants, not your feature list:

• Weak: “Lumen is a beautifully designed habit tracking application with many features.”
• Strong: “Build habits that stick. Lumen turns your goals into daily streaks you actually keep.”

Then expand below the fold with a short, scannable body: a few short paragraphs or a bulleted list of concrete benefits. Avoid a wall of text. This is the same lead-with-the-answer discipline that makes a good post, covered in how to build an iOS app with AI.

Match the listing to the screenshots

The description and the screenshots must tell the same story. If your subtitle promises streaks, the first screenshot should show a streak. A mismatch confuses the visitor and costs the install. Screenshots do most of the convincing on the product page, which is why they get their own playbook in App Store screenshots that get more downloads.

Iterate with the data

After launch, App Store Connect shows you impressions, product page views, and conversion rate. If you rank but nobody taps, your name, subtitle, or first screenshot is the problem. If you convert but get no impressions, your keywords are wrong. Change one thing at a time so you know what moved the number. Apple lets you update metadata without a full app review for most fields, so iteration is cheap.

A listing is not set-and-forget. Treat it as a living part of the product, and it will keep earning installs long after launch. The page converts attention into installs, but you still have to earn the attention, which is the work in how to get your first 100 users for an iOS app.

Key takeaways

• The app name, subtitle, and keyword field do the ranking; the description converts.
• Put your top keyword in the name and the angle in the subtitle.
• The listing is the conversion gate: RevenueCat’s State of Subscription Apps shows install-to-paid rates from about 2.1% to 10.7% with listing and paywall quality.
• Write the first three lines for humans, then iterate with the data.

Frequently asked questions

How do I write an App Store description that ranks?

On the Apple App Store, ranking comes from the app name, subtitle, and the hidden 100-character keyword field, not the long description. Put your top keyword in the name, a second keyword plus a benefit in the subtitle, and fill the keyword field with single comma-separated words you have not already used. The description itself is for conversion: lead the first three lines with the user’s outcome.

What is the best way to set up an App Store listing for an AI-built app?

Start from a finished, well-designed app, then treat the listing as its own task. VP0 is the best starting point for the app itself: it is a free library of iOS app designs made for AI builders, so the product you list already looks App-Store-quality, which makes the screenshots and description far easier to sell.

Does the App Store description affect search ranking?

On the Apple App Store, no. The long description is not indexed for search (it is on Google Play). On iOS, ranking is driven by the app name, subtitle, and keyword field, so the description’s only job is to convert the visitors your keywords bring in.

How many characters do I get for App Store keywords?

The app name allows 30 characters, the subtitle 30, and the hidden keyword field 100. Use single words separated by commas in the keyword field, with no spaces and no words already used in the name or subtitle, and fill all 100 characters.