Free ASO and App Store tools.
14 tools for iOS developers: check your listing before you submit, find keywords, and work out what your app can earn. They run in your browser and need no account.
- No signup
- Nothing uploaded
- Every result explained
Write and check your App Store listing
Limits, sizes and wording, checked before you submit.
- App Store Character CounterName, subtitle, keywords (counted in bytes, like Apple does), promotional text, description and in-app purchase names, each against its limit as you type.Live countsKeyword bytesGoogle Play fieldsCopy each fieldOpen the tool
- ASO Metadata CheckerAudit an Apple App Store or Google Play title, subtitle, short description, full description and keyword field against current limits and practical quality checks.Field-length checksKeyword coverageRepetition warningsAction listOpen the tool
- App Store Screenshot Size CheckerEvery screenshot and app preview size App Store Connect accepts, and which you must upload. Drop your images to check them against the list, in your browser.iPhone and iPad sizesRequired sizesAlpha checkPreview video specsOpen the tool
- App Icon CheckerCheck your App Store icon (1024 × 1024, no transparency, square corners) and see it on a home screen and next to the top apps in your category.Size and formatTransparency checkHome screen previewBeside the top appsOpen the tool
- App Review Theme AnalyzerPaste reviews to surface recurring complaints, praise, feature requests, sentiment and repeated customer phrases with local rule-based analysis.Theme clustersSentiment splitEvidence snippetsRepeated phrasesOpen the tool
Find keywords
Which words to target, and how to fit them in.
- Keyword Difficulty CheckerDifficulty, popularity and opportunity for an App Store search, from the real US results we record every day, with the reasons behind the score and the top 3 apps.Difficulty bandPopularity and opportunityWhy it's hard or easyTop 3 appsOpen the tool
- App Keyword Opportunity CheckerPressure-test a seed keyword using specificity, search intent, breadth and likely competitive pressure. Every score explains its inputs and limitations.Opportunity scoreDemand proxyCompetition proxyExpansion ideasOpen the tool
- iOS Keyword Field OptimizerPack priority phrases into Apple's 100-character field while removing exact duplicates, generic filler and terms already covered by visible metadata.100-character fieldVisible-word exclusionsSkipped-term reasonsOne-click copyOpen the tool
Run the numbers
Apple's fee, revenue, lifetime value and what ads can cost.
- App Store Fee CalculatorSee Apple's 30% or 15% commission, the VAT in your price and what you keep per sale, per month and per year.Apple's feeVAT / GSTProceeds per sale30% vs 15%Open the tool
- App Revenue CalculatorTurn downloads, conversion, price and churn into monthly recurring revenue and a first-year total after Apple's fee.Monthly revenueFirst-year totalSubscribersAfter Apple's feeOpen the tool
- Downloads Needed CalculatorStart from the revenue you want and work back to the downloads a month it takes, for subscriptions or one-time purchases, in year one and once renewals build up.Downloads a monthPaying users neededYear one vs steadyWhat you keepOpen the tool
- Subscription LTV CalculatorLifetime value of a monthly or yearly subscriber after churn and Apple's fee, what each download is worth, and the month it pays back what you spent on it.LTV per subscriberValue per downloadPayback monthMonth-by-monthOpen the tool
- CPI and Break-even CalculatorWork out your cost per install and per paying user, the most you can pay per install without losing money, and the return on your ad spend.Cost per installBreak-even CPIROASProfit or lossOpen the tool
- App Store Conversion CalculatorTranslate a conversion-rate target into monthly, quarterly and annual install scenarios using your own visitor and value assumptions.Install liftRelative changeTime horizonsOptional value caseOpen the tool
Free, with real App Store data
The tools above work with your numbers. These pages use ours: estimates and chart history for the apps you compete with.
- Free ASO keyword toolDifficulty, popularity and the top apps for any tracked US App Store keyword, with the reasons why.
- App revenue estimatorLook up any iOS app's estimated monthly revenue and downloads.
- How much do apps make?Revenue and downloads at each rank, for every App Store category.
- Downloads by App Store rankEstimated daily downloads and spend for every chart position, in 8 countries.
- Most downloaded apps by monthThe free apps and games downloaded most each month, in 8 countries.
- Weekly App Store reportThe iPhone apps that climbed the charts fastest this week.
- App market researchDating apps, puzzle games, AI assistants, calorie trackers and more compared on downloads, spend, pricing and complaints.
What these tools can and can't tell you.
Useful right now
Field limits, sizes, repetition, keyword packing, review language and the arithmetic of fees, lifetime value and ad costs all work with your own inputs.
Needs market evidence
Keyword demand, rank history, competitor downloads and revenue, and realistic conversion rates need outside data. Each result points to where AppTrendKit's data replaces a rule of thumb.
ASO is more than keywords
App Store optimization sits between discovery and conversion. A relevant phrase helps a listing meet the right search, but it still needs a clear promise, strong screenshots, good ratings and a product people keep.
From a free check to a decision
When a direction looks promising, AppTrendKit adds the missing context: which apps already own the market, how they are moving and what they earn.
The apps rising this week, every Monday
One email a week with the iPhone apps that climbed the US App Store fastest, and new Top Grossing entries. Free, no account needed.