Free Resources
App Development Tools
Free tools to help you design, publish, and plan your mobile app — from color palettes and icon concepts to ASO copy and cost estimates.
Color Palette Generator
Generate a full color palette with hex codes, usage roles, and WCAG accessibility contrast scores based on your app's brand style.
Open tool →DesignApp Icon Generator
Get app icon design concepts in multiple visual styles with sizing and formatting specs for both App Store and Google Play.
Open tool →ASODescription & Keyword Generator
Generate optimized short descriptions, long descriptions, and keyword sets separately for Google Play and Apple App Store.
Open tool →ASOCategory & Subcategory Picker
Get the best category and subcategory recommendations for both app stores with clear reasoning to maximize discoverability.
Open tool →PlanningApp Dev Cost Calculator
Estimate development cost, timeline, and team size for your mobile app idea based on features, platforms, and team location.
Open tool →PlanningQuick App Dev Cost Estimator
Paste your app idea and get a fast directional estimate for budget, timeline, and team size.
Open tool →ASOQuick Keyword Research Tool
Generate ASO keyword ideas and a 100-character keyword string tailored to your app context.
Open tool →PublishingSubmission Statuses Reference
Understand submission status meanings for both Google Play and Apple App Store review flows.
Open tool →PublishingiOS vs Android Differences
Quick side-by-side reference for common publishing terms, review flows, and release controls.
Open tool →Glossary
FAQ
Which tool should I start with?›
Are these tools only for new apps?›
How often should I revisit tool outputs?›
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