Can I Repeat Keywords in the App Store Keyword Field? A 100-Character Case Study

No. Repeating a word already used in your app name, subtitle, category, or keyword field spends characters without adding search coverage. This case study shows exactly where that space goes—and how to audit it without pretending a metadata edit guarantees rank.

“Can I repeat keywords in the App Store keyword field?” is one of those questions that sounds small until you look at the character budget. Apple gives an iOS listing 100 characters in its hidden keyword field. Every duplicate consumes part of that budget, and the field is one of the few places where a developer can add search concepts without making the public product page harder to read. The answer is not a secret ASO trick: Apple explicitly says not to repeat words already used in the app name, subtitle, or category. The useful question is why that advice matters in a real listing and what to put in the recovered space instead.

The short answer

Do not repeat keywords in the field. Do not repeat a word already present in the app name, subtitle, primary category, or another keyword-field phrase. Apple’s public App Store search guidance says keywords are limited to 100 characters, should be comma-separated, and should not repeat words included in your app name, subtitle, or category. Apple also advises against duplicate plurals, overly broad generic terms, and filler words. That is the official rule.

There is an important distinction here. Avoiding repetition does not mean your listing should become a pile of unrelated fragments. The name, subtitle, and keyword field work together to describe one product. A budgeting app might use “budget” visibly because customers need to understand the category, then use its hidden field for supporting ideas such as bills, expenses, savings, shared, freelance, and receipt. The goal is additional relevant coverage, not maximal semantic variety for its own sake.

The case study: a 100-character field that looks busy but says little

Consider an illustrative iOS listing for an app called “FocusFlow: ADHD Planner.” Its subtitle is “Daily routines and reminders.” The team has written this keyword field: “adhd,planner,focus,focus planner,daily planner,reminders,routine,routines,organizer,productivity app.” At first glance, it seems complete. It mentions the audience, the category, several features, and an outcome. It is also doing a surprising amount of work twice.

This is not a ranking study with a fabricated “before position 42, after position 9” result. Apple does not publish enough data for anyone to make that claim responsibly from one listing edit. It is a field-efficiency case study. The observable fact is that the listing spends scarce characters on words Apple tells developers not to repeat. The practical hypothesis is that replacing duplicates with truthful, related concepts gives the listing more ways to match relevant searches. That hypothesis can be measured after release; it should never be reported as an automatic outcome before release.

Step one: map every indexed field before editing anything

The simplest audit starts outside the keyword box. Copy the app name, subtitle, keyword field, and primary category into one sheet. Lowercase everything. Split the text into individual words, while retaining a copy of the original phrases so you can judge meaning. Then label each word by its source. You are trying to answer a mechanical question first: which concepts already have a home? This prevents a common mistake where someone optimises the keyword field in isolation and accidentally pays twice for a word that is already doing visible work.

For the FocusFlow example, “ADHD” and “planner” are already in the name. “Daily,” “routines,” and “reminders” are already in the subtitle. The keyword field repeats them in exact form or slight variation. Apple’s guidance specifically calls out plurals as duplicates—for example, using both “climb” and “climbs”—so treating routine and routines as two separate opportunities would be a poor use of the audit. A word does not become a new concept just because it gains an “s.”

This is also the moment to remove empty language. “App” adds little when the person is already searching in the App Store. “Best,” “top,” “free,” and other promotional claims can be misleading, policy-sensitive, or simply non-descriptive. The field should name what the product does and the problem it helps solve. If a word does not make the app more accurately understood, it is not a good candidate merely because a keyword tool says people search it.

Step two: recover the characters

When the duplicates are removed, the field becomes much shorter. That is good news, not an incomplete draft. In this example, a cleaner version might begin with “timer,task,checklist,habits,calendar,widgets,procrastination,executive function,study.” It is not presented as a universal ideal. Every term must be validated against the actual product. But it demonstrates the change in approach: the visible fields establish ADHD planning, daily routines, and reminders; the hidden field supplies adjacent features, behaviours, and contexts that a relevant user may search.

Notice that the replacement list does not just chase synonyms. “Timer” and “checklist” describe concrete tools. “Widgets” points to an interface surface. “Procrastination” and “executive function” describe a user problem only if the app genuinely addresses it. “Study” is a context that may be appropriate if the product has a student workflow. Good keyword choices expand the product’s truthful semantic boundary. Bad choices jump to a neighbouring market where the listing cannot satisfy the user.

Step three: check whether the new words describe real jobs

A keyword audit must be followed by a product audit. For every candidate, ask four questions. Can a person complete the task in the current app? Can you show the capability in a screenshot or app preview? Would a first-time user feel the listing kept its promise? Would you be comfortable using the word in support documentation or an App Review response? If any answer is no, remove the term. An unused duplicate is inefficient; an irrelevant replacement is worse.

This is especially important for health, finance, and identity-adjacent language. “ADHD” may be relevant to an app designed for users with ADHD, but the listing should not make treatment claims it cannot support. “Therapy,” “diagnosis,” “medical,” “banking,” or “investment” are not interchangeable search expansions. A keyword field is hidden from customers, but it remains metadata submitted to Apple. The standard should be the same as for public copy: accurate, specific, and supportable.

What repetition costs in practice

Repetition costs coverage first. If half the field is occupied by variations of planner, routine, and reminder, the listing has no room to express other relevant features such as calendar, checklist, widget, shared task, timer, or offline mode. That means the product can be a credible answer to a query without giving Apple enough textual context to recognise the match. The exact search matching behaviour is not public, but Apple’s own instruction not to repeat terms tells developers that duplication is not an additional relevance signal worth paying for.

It also costs decision quality. When a team sees a long keyword field, it can feel as though every important idea is represented. A field audit reveals whether the apparent breadth is real. In many early-stage listings, the same two or three category words occur across name, subtitle, description, screenshots, and hidden keywords while distinctive features have no representation at all. The audit creates a sharper product question: what is genuinely different about this app, and can a searcher reasonably use words for that difference?

Phrases, combinations, and the myth of comma magic

Developers often repeat a word because they are trying to target a phrase. They write “focus planner” even though focus is already in the field and planner is in the name, hoping that the exact pair earns a separate benefit. Apple’s guidance makes the safer approach clear: do not duplicate terms across the visible metadata and keyword field. Use the available characters for distinct, meaningful words and phrases. The store may combine relevant terms, but the implementation details are not a public contract and should not be reverse-engineered from a handful of rankings.

Comma separation is formatting, not strategy. Use commas to separate entries, omit unnecessary spaces so the character budget is not wasted, and use spaces within a genuine multi-word phrase where the phrase carries a distinct meaning. The more valuable decision is still semantic: does the phrase reveal a capability or intent that no existing field covers? “Executive function” can be a meaningful phrase for an appropriate app. “Daily planner” is usually just a duplicate when daily is in the subtitle and planner is in the name.

How to test the field without fooling yourself

Take a baseline before submitting changes. Record the exact old metadata, the storefront, the date, the target queries, current positions where available, search impressions, product-page views, conversion rate, downloads, ratings, and any acquisition campaigns. Then make one coherent change. Do not alter title, subtitle, screenshots, price, onboarding, and keyword field in the same release if the goal is to learn about keyword coverage. You can redesign later; first create a clean observation window.

After the change is live, check the same queries over multiple dates and keep the result pages, not only your own rank. A competitor may launch, Apple may change the page, a query may be seasonal, or the result can move temporarily after metadata propagation. Look for a pattern across the terms you intentionally added and compare it with untouched terms. Apple recommends monitoring App Analytics for search impressions, conversion, and downloads; that is more useful than celebrating a single rank screenshot.

A reusable 100-character audit

The answer worth remembering

You can technically type repeated keywords into the App Store keyword field. You should not. Apple’s own guidance says not to repeat terms from the app name, subtitle, or category, and the reason is practical: a 100-character budget is too small to spend twice on the same idea. Treat each character as an opportunity to make the app more accurately understood. Remove duplicates, replace them with real supporting concepts, and measure the result with enough patience to separate evidence from hope.

Check your subtitle

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