For over a decade, Growth Bug has been where I write down what I learn building and growing apps — from Paytm to indiagold. Today it becomes more than a blog: I'm launching 22 free growth tools and a directory of 90+ growth platforms. No sign-up, no paywall.
Why build tools?
Most growth questions I get are the same: Is my App Store listing any good? Why is my site slow? Is my LTV:CAC healthy? Did my A/B test actually win? Answering them usually means juggling paid tools, spreadsheets and guesswork. So I built the checks and calculators I wish I'd had.
What's inside
App growth
- App Store Listing Checker — score any App Store or Play Store listing with a fix list.
- Competitor App Compare — two listings side by side.
Website & SEO
- SEO Score Checker, Page Speed Test, Share Preview Checker and Meta Tag Generator.
- AI Search Readiness Checker — can ChatGPT, Claude and Perplexity read and cite your site?
AI assistants
- Headline Analyzer, App Store Copy Writer, Blog Outline Generator and App Review Insights, which turns hundreds of reviews into a priority list.
Growth maths
- CAC / LTV, Retention Curve, DAU/MAU, Funnel, A/B Test Significance, Viral K-Factor, Churn & MRR and a UTM Link Builder.
India fintech
- UPI Market Share Tracker — PhonePe, Google Pay, Paytm, Navi and CRED from NPCI data.
- Gold Loan Calculator — maximum loan under RBI's new loan-to-value rules, plus interest and EMI.
Growth Resources: the growth stack, mapped
The Growth Resources page lists the platforms growth teams actually use — analytics, attribution, ASO, SEO, experimentation, CRM, email, ads, customer data, research, referrals, social, launch communities and monetization — each one click away.
Use it inside your AI assistant
Growth Bug also works inside ChatGPT, Claude and Cursor. Add https://growthbug.com/mcp as a connector and your assistant can search every Growth Bug article and run the SEO, AI readiness, App Store and unit-economics checks for you.
What's next
This is version one. If there's a tool you'd use every week, or a platform missing from the list, tell me on LinkedIn or X — I'll build the most-requested ones next.
![App Growth Metrics: eCPI, CAC, True LTV, Retention, Cost of MAU/DAU Calculator for Beginners [Download Excel]](https://miro.medium.com/v2/resize:fit:1200/1*vnvxHGioGbevnOh1KZSvsA.jpeg)
