The subtitle (iOS) / short description (Play) is the second-most-weighted ASO field after the title. Common mistakes: repeating title keywords (waste), generic tagline (no keyword value), too long (truncation). The fix is secondary keywords with a clear benefit statement that doesn't duplicate the title. See the App Audit hub for full ASO context.
App Store subtitle: 30 characters
shown below app name on listing
indexed for search
Google Play short desc: 80 characters
shown in expandable section
indexed for search
Title: "Acme: CRM & Lead Tracker" Subtitle: "Sales pipeline manager" ← different keywords than title NOT: Subtitle: "CRM and lead tracker" ← duplicates title (wasted) The subtitle should add secondary keywords, not repeat title ones. Together title + subtitle should cover 3-4 primary search terms.
Subtitle also affects conversion. Users see it before tapping. Bad subtitles look spammy; good ones promise concrete value:
Bad: "Best app ever, top-rated, #1 sales tool" Good: "Track leads, close deals faster" Best: "Track leads. Close deals faster." (period adds emphasis)
Productivity: "[function] for [audience]" "Notes for teams" Utility: "[verb] [object]" "Convert any PDF" Entertainment: "[mood/genre] + verb" "Calm puzzle games" Health/Fitness: "[goal] in [time]" "Lose weight in 30 days" Finance: "[outcome] [audience]" "Invest smarter, easier"
Subtitle A/B testing same as title — App Store Connect and Play Console both support. Run minimum 7 days. Watch conversion rate (installs ÷ impressions) and search ranking changes simultaneously.
Almost every mistake in this field comes from optimising for one of its jobs while forgetting the other.
Job 1: indexing - The words are searchable - Repeating title words wastes the field - Pressure: cram in more terms Job 2: conversion - A person reads it before tapping - It sits directly under your app name - Pressure: say something human
Optimise only for indexing and you get "CRM lead tracker sales pipeline deal manager" — every word earning its keep, and a listing that reads like spam to the human being it is trying to persuade. Optimise only for conversion and you get "Work smarter, not harder", which is charming and searchable by nobody.
The resolution is not a compromise between the two. It is finding the sentence a person would actually say about your app, using the words a person would actually search for — because those are usually the same words. "Track leads. Close deals faster." is a real sentence and a keyword set at once. That coincidence is the target, and it is achievable far more often than teams expect.
You will see the subtitle described as the second-most-weighted field, the title as the first, and the keyword field as third. These orderings are inferred from observation by practitioners; neither Apple nor Google has published a weighting for any metadata field, and the exact figures shift silently.
That is not a reason to ignore the guidance — it is a reason to hold it loosely, and to prefer mechanisms you can see over rankings you cannot verify. Three things are solid:
Those three facts generate every piece of good advice on this page without needing to know a weighting. And where a question genuinely turns on relative weight, both stores let you settle it with a split test instead of an argument.
Teams arriving from web SEO tend to assume that over-optimised metadata is merely ineffective. On the app stores that assumption is wrong, and the difference matters.
Apple's App Review Guidelines prohibit metadata that is irrelevant, repetitive, or misleading, and Google Play has an equivalent policy for store listings. Both are enforced by review — which means the outcome of a stuffed subtitle is not a gradual ranking decay you can shrug at, but a rejected submission or a listing pulled from the store.
The practical line: if you would be embarrassed to read the subtitle aloud to a customer, do not ship it. That test catches almost everything a reviewer would.
Section 5 says to A/B test, and two disciplines make the difference between a test that answers a question and a test that wastes a fortnight.
Give it time to settle. A metadata change alters which searches you surface in, and that redistribution takes days before the conversion data means anything. Judging a subtitle after 48 hours is measuring noise, and teams that do it repeatedly end up reverting good changes.
Change one variable. A subtitle rewritten in the same release as new screenshots tells you that something improved and nothing about what — and the natural next move is to keep both, which means you now own an asset you have never actually validated. Test the subtitle alone, then the screenshots alone, and you learn twice as much from the same traffic.
And test against what you have, not against your favourite alternative. The current subtitle is the incumbent, and it is winning until something beats it — a discipline that saves a surprising number of listings from being redesigned into something worse by a team that had simply grown bored of looking at it.
Teams treat the 30-character limit as a compression problem: take what we want to say and squeeze it. That is the wrong framing, and it produces the abbreviated, comma-spliced subtitles that litter the store.
Thirty characters is roughly four words. It is not enough room to describe an app. It is exactly enough room to say what the app is for — and if you cannot, the problem is not the limit. It is that the team has not agreed on the answer.
Symptom of an unresolved product story: "CRM, tasks, notes & email" (a list, not a claim) "The all-in-one work platform" (a claim about nothing) "Smarter tools for modern teams" (words with no content) What a resolved story sounds like: "See which lead to call next" "Track leads. Close deals faster." "Expenses, sorted in seconds"
Each of the good ones commits to something. Committing is the hard part, because it means the four other features somebody built do not appear — and the instinct to protect them is what produces the bad ones.
The useful reframing: the subtitle is not where you describe the app. The description is. The subtitle has one job, which is to make a stranger understand in a second what problem this solves for them. Everything else is competing with that job.
Each App Store locale carries its own subtitle, and the same trap applies here as everywhere else in ASO: teams translate the English subtitle and ship it.
A translated subtitle is a claim built for a market you have not looked at. The benefit that persuades in one country routinely is not the one that persuades in another — price sensitivity, privacy expectations, whether the category is mature or novel, and even whether people use an app for this at all differ by market. No translator surfaces that, because it is not a language question.
There is also a mechanical dimension worth knowing: character limits bite differently across languages. Thirty characters of German is substantially less information than thirty characters of English, and languages with longer compound words will force a genuinely different claim rather than a shorter one. That is not a translation failure; it is the constraint doing its job.
So do the two or three markets that carry real revenue properly — research what people there care about, write a native subtitle around it, and test it — then use a clean translation everywhere else. Three markets done properly beats twelve done in a way that fools nobody, and it costs less.
Worth ending on the limit. A subtitle decides which searches you surface in and whether a person understands you in the second before they tap. It does not decide whether they install, and it certainly does not decide whether they stay.
The install decision is made mostly by the first two screenshots and the rating. The retention decision is made by the app. A perfect subtitle in front of a listing whose screenshots show a raw settings screen, or an app with a two-star average, is a well-worded invitation to something people have already decided against.
So sequence the work accordingly: get the title and subtitle saying plainly what the app is for, get the first screenshots showing the outcome, and then iterate on the wording — because a metadata change that lifts conversion on a listing people want is compounding, and the same change on a listing people do not want is arithmetic on a small number.
Avoid it — both fields are indexed, repetition is wasted. Each word should expand coverage. Apple's algorithm explicitly downweights repetition.
Feature with brevity. 'Track expenses easily' beats 'An app to help you track your daily expenses with ease'. Subtitle space is precious; every word should work.
Yes — Apple Search Ads pull from app metadata including subtitle. Strong subtitle improves both organic and paid relevance scores.
Every 4-8 weeks during optimization phase, then quarterly once stable. Don't change more often — gives no time for ranking changes to manifest.
It is widely treated that way, and it is worth knowing that neither Apple nor Google publishes a weighting for any metadata field. The ordering that circulates in ASO guidance is inferred from observation, not documented — so treat it as a reasonable working assumption rather than a fact. What is solid is the mechanism: the subtitle is indexed, it appears under your app name where a person sees it before tapping, and it is therefore doing keyword work and conversion work at the same time. That dual role is the real reason it matters.
A sentence made of the right keywords, which is a harder brief than either extreme. A subtitle stuffed with terms reads as spam to the person who is about to decide whether to install, and Apple's metadata policies prohibit repetitive or irrelevant keywords — it is a review risk, not merely an ineffective one. A pure tagline with no searchable words wastes an indexed field. The subtitle that works says something a person would say, using the words a person would search for, because those are usually the same words.
Long enough for the store to redistribute your impressions, which takes longer than most teams' patience. A metadata change can move which searches you appear in, and that shift takes days to settle before the conversion data means anything. Judging after 48 hours mostly measures noise. Run a proper test through App Store Connect or Play Console, give it at least a week, and change one thing at a time — a subtitle rewritten alongside new screenshots tells you that something moved and nothing about what.
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