How to Write an App Store Description That Converts
Apple’s description is 4,000 characters of conversion copy, not a keyword essay. Structure, first-sentence rules, and why a “description generator” still needs you.
Quick answer
How do you write an App Store description that converts?
Write a short opening paragraph that states the outcome, then a short feature list. Apple’s description field is 4,000 characters of plain text. The first sentence is what people can read without tapping “more.” Do not stuff keywords. Do not put prices in the body. Changing the description requires a new app version. An App Store description generator can draft; you still have to edit for honesty, policy, and the first line.
- App Store description character limit: 4,000, plain text, no HTML
- Lead with one outcome sentence, then a short feature list
- Apple search ranking uses name, subtitle, and keywords — not this field
- The App Store web page can still be indexed by web search engines
- You need a new version to change the description; use promotional text for news
On this page
People search “App Store description generator” because the 4,000-character box looks empty and dangerous. The field is not a ranking essay. Apple tells you to write a concise, informative paragraph and a short list of main features, and to treat the first sentence as the only line many people will read. A model can draft that. It cannot see whether screenshot one still matches the claim.
Apple’s structure is on Creating your product page . Connect’s reference lists the description as 4,000 characters of plain text, required, localizable, and shown on the product page and at install. It also notes the text can appear in web-engine search results for the App Store web listing. That is not the same as App Store search ranking, which Apple ties to name, subtitle, and keywords.
What the 4,000 characters are for
| Field | Limit | Ranks in App Store search? | When it changes |
|---|---|---|---|
| Name | 30 | Yes | With a version |
| Subtitle | 30 | Yes | With a version |
| Keywords | 100 | Yes (hidden) | With a version |
| Promotional text | 170 | No | Anytime, no new binary |
| Description | 4,000 | Not a primary ranking field | With a version |
Use name, subtitle, and keywords to get found. Use the description to convert someone who already opened the page. Use promotional text for news you cannot wait to ship in a binary.
A structure that still sounds like a person
- Sentence 1: the outcome, in words a stranger would say.
- Two or three sentences: who it is for and what a first week looks like.
- A short feature list: one line each, verbs first, no “powerful AI engine.”
- Optional close: who should skip the app, or what you need (an account, a device).
- Optional last line: one accolade, not a trophy wall.
| First sentence | Why it works |
|---|---|
| Split shared expenses without a spreadsheet or a group-chat argument. | Outcome + the thing it replaces |
| Plan hikes offline, then follow the track when the cell signal drops. | When the job happens |
| Keep a habit streak your kids can see on the fridge, not only in a chart. | Audience is in the sentence |
The first sentence has to stand alone under “more.” If it only works after three paragraphs, it is not the first sentence.
What an App Store description generator can and cannot do
ChatGPT, Grok, or any writing model can produce a paragraph-plus-bullets draft in the tone you ask for. That is useful. It is not a store listing. Models invent features, repeat the subtitle, paste keyword lists, and write prices Apple told you not to put in the body. AppGrowthKit generates screenshot headlines and captions on real app screens. It is not a 4,000-character description generator — and you should not want a one-click dump into Connect anyway.
- Paste your real feature list and who it is for. Do not ask for “an ASO description.”
- Ban “#1,” “best,” “all-in-one,” and competitor names in the prompt.
- Force a 40-word opening paragraph before any bullets.
- Delete any line that is not true in the current build.
- Count the result in the ASO Character Counter. You will not hit 4,000. You will hit honesty first.
Make the first sentence and screenshot one agree
If the description opens on split bills, screenshot one should show a split, not a pastel logo. Apple search can show the first one to three frames before anyone opens the page. The description is for the people who did open it. Those two jobs should still say the same thing.
Write and ship an App Store description
Do this after the name and subtitle are locked so the body does not repeat them for 200 characters.
Write the first sentence on paper
Outcome only. Read it out loud. If you need a second clause to make it true, it is not ready.
Add a short paragraph and a feature list
Apple’s recommended shape: one concise paragraph, then main features. Keep the list shorter than your ego.
Strip policy problems
No prices, no keyword piles, no ranking claims. Move a time-limited offer to promotional text.
Check the first three screenshots
The body should not introduce a job the search frames never show.
Submit with a version
Description edits ride a binary through App Review. Use promotional text if the news cannot wait.
App Store description questions
What is the App Store description character limit?
4,000 characters. Plain text only. HTML is not supported. Line breaks are fine. You do not need to fill the box.
Is there an App Store description generator?
Writing models can draft a paragraph and a feature list. They do not know your current UI, and they will invent claims. AppGrowthKit generates screenshot copy on real captures. It does not auto-write the 4,000-character Connect field. Edit any draft before you submit.
Does the App Store description help you rank?
Apple’s product-page guidance treats name, subtitle, and keywords as the search-oriented metadata and tells you not to stuff the description for search. Connect’s reference says the description can be used for web-engine search results on the App Store web listing. Write it to convert, not to game Apple search.
Can I change the description without a new app version?
No. Apple says you update the description when you submit a new version. For news you need live this week, use promotional text (170 characters, editable without a new binary, not a ranking field).
Sources, verified 2026-09-19:
Free tools that help here
Top App Store Apps
Track Apple App Store top charts across 30 countries. View top free and paid rankings for ASO research - updated from Apple's public RSS feed.
ASO Character Counter
Count characters for every App Store and Google Play metadata field against exact store limits. Live counts and over-limit warnings - nothing gets truncated at submission.
Screenshot Beautifier
Add polished backgrounds, padding, shadows, and rounded corners to any screenshot in seconds. Perfect for social posts, docs, and portfolios.
The description explains. Screenshots prove it.
If the first sentence promises a split bill, frame one should show a split. AppGrowthKit builds editable, store-ready screenshot sets from the UI you already have.
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