Free ASO Tools for App Growth

App Name Character Counter

Check your App Store app name against the 30-character limit as you type.

Keyword Density Checker

Analyze keyword frequency in any app description and spot over-optimization.

Subtitle Character Counter

Validate your App Store subtitle against the 30-character limit in real time.

Keywords Field Counter (100 chars)

Fit the maximum keywords into Apple’s hidden 100-character field.

Promotional Text Counter

Keep your App Store promotional text within the 170-character limit.

App Description Counter

Track your App Store description length against the 4,000-character limit.

Google Play Title Counter

Check your Android app title against Google Play’s 30-character limit and naming policy.

Google Play Short Description Counter

Make every one of Google Play’s 80 short-description characters count.

Google Play Description Counter

Balance length and keyword density in your 4,000-character Play description.

All-in-One Metadata Length Checker

Validate every App Store and Google Play text field against its limit in one screen.

Keyword Field Optimizer

Automatically strip duplicates, wasted spaces, and title overlaps from your 100-character keyword field.

ASO Stop Word Remover

Strip the stop words Apple ignores and reclaim keyword field characters.

Keyword Combiner

Generate every combination of two keyword lists for ASO and Apple Ads research.

Keyword List Deduplicator

Merge keyword lists from every source and strip the duplicates in one pass.

Title Case Converter

Convert app names and metadata between Title Case, Sentence case, UPPER, and lower.

Description Formatter

Preview how your description’s line breaks, bullets, and emoji actually render on the stores.

Special Character Checker

Detect emoji, symbols, and invisible characters that put your metadata at rejection risk.

Metadata Diff Tool

Compare two versions of any metadata text with a word-level diff.

Release Notes Generator

Turn a bug fix or feature into polished ‘What’s New’ text in seconds.

App Description Template Generator

Start from a proven store description skeleton instead of a blank page.

Keyword Popularity Checker

Look up any keyword’s real App Store popularity score on Apple’s 5–100 scale.

Keyword Difficulty Checker

Estimate how hard it is to rank for any App Store keyword before you spend metadata space on it.

App Store Autocomplete Explorer

See the live search suggestions the App Store shows for any seed term — the queries users actually type.

Related Keywords Finder

Expand any seed keyword into the related terms App Store users search around it.

Keyword Rank Checker

Search any keyword like a user would and see exactly where your app ranks in the results.

Competitor Keyword Extractor

Pull the keywords any competitor is targeting straight out of their visible App Store metadata.

Long-Tail Keyword Generator

Combine your seed keywords with proven modifiers and question patterns to generate long-tail candidates instantly.

Keyword Volume Comparison

Put two or more keywords head-to-head on Apple’s popularity scale and pick the one with real demand.

Trending Searches Explorer

Browse the searches trending on the App Store right now, in any country.

Multi-Country Keyword Checker

Check one keyword’s popularity across many App Store countries in a single query.

AI Keyword Suggestions

Describe your app and let AI generate keyword ideas you can validate against live App Store data.

Keyword Translation Helper

Translate keywords by search intent, not dictionary meaning — get the terms locals actually type.

Branded Keyword Separator

Split any keyword list into branded and generic terms in one pass.

Search Result Preview

Mock up exactly how your icon, title, and subtitle will look in App Store search results.

Free ASO Score Checker

Search any app and get an instant ASO score with concrete fixes for title, subtitle, description, and keywords.

App Metadata Viewer

Look up the full public App Store metadata of any app — title, subtitle, description, category, and ratings in one view.

App Comparison Tool

Put two App Store apps side by side and compare their metadata, ratings, categories, and update cadence.

Similar Apps Finder

Discover the apps Apple links to any app through its “customers also bought” recommendation graph.

Publisher Portfolio Viewer

See every app a developer has published on the App Store, with ratings and categories at a glance.

Top Charts Explorer

Browse App Store top charts — free, paid, and grossing — for any country and category.

Category Rank Checker

Check where any app ranks in its App Store category charts, in any country.

App ID Finder

Find any app’s numeric App Store ID from its name or URL in seconds.

App Availability Checker

Check which country storefronts an app is available in — and which markets it is missing from.

App Store Link Builder

Build clean, trackable App Store and Google Play links with campaign parameters — no guesswork on the URL format.

App QR Code Generator

Generate a download QR code for your app — rendered entirely in your browser, nothing uploaded anywhere.

Smart App Banner Generator

Generate the apple-itunes-app meta tag that shows a native App Store banner on your website in Safari.

App Store Badge Generator

Generate correct HTML for the official “Download on the App Store” and “Get it on Google Play” badges.

App Version Viewer

Look up any app’s current version, release date, and full release notes without opening the store.

App Review Explorer

Browse the latest App Store reviews for any app, in any country, without leaving your browser.

Review Sentiment Analyzer

Let AI classify an app’s recent reviews as positive, negative, or neutral — and tell you why.

Review Reply Generator

Paste any app review and get a professional, on-tone developer response drafted by AI in seconds.

Rating Uplift Calculator

Calculate exactly how many new 5-star reviews you need to reach your target average rating.

Review Keyword Extractor

Mine app reviews for the exact words real users use — then put them in your metadata.

Rating Distribution Visualizer

See the star-by-star histogram behind any app’s average rating.

Review Response Templates

Fill-in-the-blank developer responses for bug reports, feature requests, negative and positive reviews, and refund requests.

Featured Review Finder

Surface an app’s most quotable, helpful positive reviews — ready for your website, ads, and screenshots.

App Store Screenshot Size Calculator

Look up every required screenshot resolution for the App Store and Google Play in 2026.

App Icon Resizer

Upload one 1024×1024 icon and download every required iOS and Android size instantly.

App Icon Size Reference

Every iOS and Android icon dimension in one table — store, launcher, and adaptive specs.

Google Play Feature Graphic Guide

The exact 1024×500 spec for Google Play’s feature graphic, plus design rules that convert.

App Preview Video Specs

Every rule for iOS App Preview videos and Google Play promo videos in one reference.

Screenshot Text Counter

Check screenshot headlines and captions against readability-based length guidelines.

App Icon Contrast Checker

Analyze your icon’s contrast and visual complexity to make sure it stands out in the store.

Screenshot Order Planner

Plan the sequence of your store screenshots so the first three do the selling.

Device Frame Preview

Drop a screenshot into a device-style frame and see it at real store thumbnail size.

Icon Color Palette Extractor

Pull the exact dominant colors out of any app icon for brand-consistent store assets.

Icon Legibility Tester

See your app icon at every real display size, from 29 px settings rows to the 1024 px store master.

Asset Naming Generator

Generate consistent, sortable file names for screenshot and icon sets across locales and devices.

ASO ROI Calculator

Translate an expected organic download uplift into incremental monthly revenue.

Apple Search Ads CPA Calculator

Compute CPT, CPA, and tap-to-install rate from your Apple Search Ads spend.

ROAS Calculator

Calculate return on ad spend and the break-even ROAS your margin requires.

App LTV Calculator

Estimate customer lifetime value from ARPU and churn or average lifetime.

ARPU Calculator

Calculate average revenue per user — and see how ARPU differs from ARPPU.

Churn Rate Calculator

Calculate subscriber churn and convert between monthly and annual rates correctly.

App Retention Rate Calculator

Compute D1, D7, and D30 retention from your cohort numbers and compare to benchmarks.

App Store Conversion Rate Calculator

Turn impressions, page views, and installs into the funnel rates Apple grades you on.

App Store Commission Calculator

See what Apple actually takes — 30%, 15% Small Business, or 15% after year one.

Subscription Revenue Calculator

Project net subscription revenue over time with commission and churn decay built in.

Freemium Conversion Calculator

Calculate your free-to-paid conversion rate and benchmark it against the 1–5% norm.

UA Break-Even Calculator

Compare CPI against LTV to get payback period and your maximum profitable CPI.

A/B Test Significance Calculator

Run a two-proportion z-test on your A/B results to see if the winner is real.

A/B Test Sample Size Calculator

Find how many visitors per variant your test needs at 80% power and 95% confidence.

eCPM Calculator

Compute effective CPM from ad revenue and impressions, and project earnings at scale.

CPI Budget Planner

Convert between install targets, CPI, and budget for any user acquisition plan.

Privacy Policy Generator

Generate a store-ready privacy policy for your iOS or Android app in minutes.

Terms of Service Generator

Draft clear terms of service for your mobile app covering accounts, purchases, and acceptable use.

EULA Generator

Create a custom end user license agreement for your app — or learn when Apple’s default EULA is enough.

App Rejection Checker

Lint your app metadata for the phrases and patterns that trigger App Store rejections.

Age Rating Helper

Walk through Apple’s age rating questionnaire before you answer it for real in App Store Connect.

Privacy Nutrition Label Helper

Work out your App Store privacy label — tracking, linked, and not-linked data — before you fill in App Store Connect.

Pre-Submission Checklist

Run through every App Store submission requirement before you press “Submit for Review”.

App Launch Checklist

Everything to nail before, during, and after your app launch — in one interactive checklist.

GDPR & COPPA Checker

Check your app against the GDPR and COPPA requirements that apply to mobile developers.

Data Safety Helper

Prepare Google Play’s Data safety form — collection, sharing, and security practices — without guessing.

Apple Search Ads Bid Calculator

Work out the maximum cost-per-tap you can bid while staying under your target CPA.

Negative Keyword Generator

Turn your search terms report into a clean negative keyword list that stops wasted spend.

Apple Search Ads Budget Planner

Turn an install goal into the daily and monthly Apple Ads budget needed to hit it.

Match Type Expander

Paste keywords once and get formatted exact and broad match lists ready for bulk import.

Custom Product Page Planner

Plan which custom product pages to build, for which keyword themes, before you brief a designer.

Apple Ads TTR & CVR Benchmark

Compare your tap-through and conversion rates against typical Apple Search Ads ranges.

Duplicate Keyword Finder

Paste two campaign keyword lists and instantly see the overlaps causing self-competition.

UA Channel Mix Planner

Split your acquisition budget across channels by CPI and volume caps to see blended CPI and projected installs.

Locale Coverage Checker

Search any iOS app and instantly see which App Store languages its listing supports.

Locale Character Limits Reference

App Store metadata character limits for every localization, in one reference table.

App Store Storefront Country List

Every App Store storefront country code with its primary language, in one searchable table.

Keyword Localization Helper

Turn your keywords into the terms native users actually search — not literal translations.

Locale Priority Planner

Score languages by market size, competition, and cost to decide what to localize first.

RTL Text Checker

Detect direction issues, bidi control characters, and mixed-direction problems in RTL metadata.

Storefront Pricing Reference

See how Apple’s price points map to local currencies and taxes across major storefronts.

AASA File Validator

Validate your apple-app-site-association file before broken universal links reach users.

Deep Link Tester

Break any universal link or URL scheme into its parts and catch the mistakes that stop it from opening your app.

App Store Connect JWT Decoder

Decode App Store Connect API tokens in your browser to debug 401 errors — the token never leaves your device.

Bundle ID to App ID Converter

Look up any app’s numeric App Store ID from its bundle ID — or go the other way — in one search.

Release Timing Planner

Pick the right day to submit and release your app update, with review times and rollout curves accounted for.

SemVer Helper

Parse any version number, understand what each part means, and get the right next version suggested.