Free App Store optimization tools for indie devs
A free ASO toolkit that runs in your browser. App Store SEO, keyword research, screenshot tools, listing preview and metadata checks. No signup, no paywall, the full ScreenMagic suite is paid, these surfaces stay free forever.
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App Icon Generator
Drop a 1024x1024 icon, download every App Store and iOS device size in one zip
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Screenshot Resizer
Drop in any screenshot and download every App-Store-Connect-accepted size
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Character Counter
Count characters against Apple's title, subtitle and keyword field limits live as you type
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Review Response Generator
AI-drafted replies to App Store reviews, keep tone, address the issue, no fluff
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Privacy Nutrition Label
Walk through Apple's privacy questionnaire and export the nutrition label JSON
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Listing Preview
See how your icon, name, subtitle and screenshots render on App Store and Play before you submit
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Rejection Checker
Run your metadata against Apple and Google guidelines, catch beta language, missing privacy URLs and pricing slip-ups
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Release Notes Generator
Pick a release type, paste your changes, choose a tone, get polished What's New copy in seconds
What App Store optimization tools actually move the needle
App store optimization, ASO for short, is the loop of picking the right keywords, writing tight metadata and shipping screenshots that convert. App Store SEO is the same idea, slightly different vocabulary, mostly used by people who came from web search marketing. Whatever you call it, the work is identical, rank for the queries your users type and turn that traffic into installs.
Most ASO tools fall into four categories. Icon tools generate every required size from a single 1024x1024 master. Screenshot tools resize, restyle and preview your store gallery for both Apple App Store and Google Play. Text tools handle keyword research, character counting against Apple's strict subtitle and keyword field limits and copy generation for release notes and review replies. Listing tools give you a believable preview of your final store page before you push to App Store Connect or the Play Console.
The reason free tools beat paid ones at the experimentation phase is simple, you iterate faster when there is no friction. A paid ASO service or app store optimization tool with a 14-day trial pushes you to commit before you have figured out your positioning. A free App Store keyword tool, a free screenshot resizer and a free listing preview let you try ten variations on a Saturday afternoon, then ship the winner Monday morning.
The eight utilities on this page are built around that fast loop. They cover the dull, repetitive parts of an App Store optimization keyword tool workflow, character counting, icon resizing, screenshot prep, plus the higher-leverage pieces, listing preview, rejection checker, review responses. Together they replace a stack of paid App Store SEO tools that usually charge $50 to $200 a month for the same surface area.
Google Play optimization runs on the same playbook with one twist, Google indexes your full long description, so keyword density inside readable copy matters more on Android than on iOS. Most of the tools below treat both stores as first-class. The listing preview shows side by side what your gallery looks like on Apple App Store and Google Play, which is the fastest way to catch text that reads great on iOS and falls flat in an Android app store optimization context.
None of this replaces taste. An ASO toolkit gives you leverage, it does not pick your audience or your hook. Use these free App Store optimization tools to remove the busywork, then spend the time you saved on the parts that actually decide whether someone taps install.
Free ASO tools for App Store and Google Play
Quick recap of every tool in the toolkit, what it does and where it fits in your App Store SEO workflow. All eight cover both Apple App Store and Google Play unless noted.
- App Icon Generator, upload a 1024x1024 master, download every App Store, iOS, watchOS and Google Play icon size in one zip.
- Screenshot Resizer, drop in any screenshot and export every App Store Connect and Google Play accepted size, ready to upload.
- Character Counter, count characters live against Apple's title, subtitle and 100-character keyword field, the unofficial App Store keyword tool every ASO writer needs.
- Review Response Generator, AI-drafted replies to App Store and Google Play reviews, keep tone, address the issue, no copy-paste fluff.
- Privacy Nutrition Label, walk through Apple's privacy questionnaire and export the nutrition label JSON for App Store Connect.
- Listing Preview, see how your icon, name, subtitle and screenshots render on App Store and Google Play before you submit, useful for both iOS and Android app store optimization.
- Rejection Checker, run your metadata against Apple and Google policies, catch beta language, missing privacy URLs and pricing slip-ups before review rejects you.
- Release Notes Generator, pick a release type, paste your changes, choose a tone, get polished What's New copy in seconds.
Frequently asked questions about ASO tools
What are the best free App Store optimization tools?
The best free ASO tools cover the four things that actually move installs: a clean app icon, properly sized screenshots, tight metadata copy and a believable listing preview before you submit. The eight tools on this page were built around that workflow. They run in your browser, output store-ready files and stay free forever. There is no trial timer, no credit card and no upsell hidden behind a feature flag.
What is App Store SEO?
App Store SEO is the practice of ranking your app for the keywords your users actually type into Apple App Store and Google Play. It overlaps heavily with ASO. Title, subtitle, keyword field on iOS, short and long description on Android, screenshots, ratings and conversion rate all feed the algorithm. Strong App Store SEO usually means picking a small set of relevant keywords, fitting them naturally into your metadata and iterating on your screenshots until your tap-through rate climbs.
Are these free ASO tools really free?
Yes. The eight tools listed here have no paywall, no signup wall and no usage cap. The paid ScreenMagic suite is a separate product that handles AI-restyled screenshots, localization in 30 languages and store-ready exports. We keep these utilities free because they are commodity work, character counting, icon resizing, listing previews. You should not pay a subscription to count characters.
Can I use these tools for Google Play optimization too?
Most of them, yes. The screenshot resizer covers Google Play feature graphic and phone sizes. The listing preview renders both App Store and Play layouts side by side. The rejection checker reads your metadata against both Apple and Google policies. The character counter is iOS-specific because Apple is the strict one on field limits, but Android app store optimization workflows still benefit from the icon generator, listing preview and review response tools.
What is an App Store keyword research tool?
An App Store keyword research tool helps you find the search terms that real users type into Apple App Store and Google Play, then estimates how hard it is to rank for each one. A good app keyword optimization tool surfaces volume, difficulty and relevance, so you can pick a small set of keywords that fit your niche and your subtitle. The character counter on this hub plus the listing preview together cover the writing and validation half of that workflow.
How much does App Store optimization cost?
App store optimization cost ranges wildly. A managed ASO service runs from a few hundred dollars a month to several thousand, depending on whether keyword research, creative work and ongoing experiments are included. Doing it yourself with free tools and a paid screenshot generator usually lands under $50 a month. For a solo dev or small team, the DIY path with a free ASO toolkit plus a focused screenshot suite is almost always the better starting point.
Do I need a paid ASO service to rank?
Not at the start. Paid app store optimization services make sense once you have product-market fit and a budget that justifies a retainer. Before then, free ASO tools and a sharp instinct for your users will get you further than an expensive consultant. Pick three to five target keywords, write a tight subtitle, ship strong screenshots, watch your conversion rate, iterate. That loop is what actually moves rankings, not the size of the invoice.
What's the difference between ASO and App Store SEO?
They are almost the same thing, used interchangeably in most blogs and tools. ASO, app store optimization, is the term Apple and Google ecosystem people tend to use. App Store SEO leans toward the search marketing crowd who came from Google web SEO. Both describe the same goal, ranking your app for relevant queries on Apple App Store and Google Play, and improving the conversion rate from search to install.
Get the full screenshot suite
These eight stay free forever. When you need AI-restyled screenshots, localization in 30 languages and store-ready exports, the paid suite picks up where the free tools stop.