Growth by Kev.
Sandbox Products Blog About Contact
Sandbox Products Blog About Contact

Free Tools

The Sandbox

Small tools built from real mobile growth work. Use them to make better decisions faster.

ASA Budget Calculator

Calculate your ideal Apple Search Ads budget based on real benchmark data. Get CPI estimates, recommended daily spend, and break-even analysis.

Try it free

A/B Test Duration Calculator

Find out how long to run your App Store experiments for statistically significant results.

Try it free

Subscription LTV Calculator

Calculate your subscription app's lifetime value, net LTV after fees, and maximum CPA for profitable acquisition.

Try it free

Paywall Benchmark Checker

Compare your trial start and conversion rates against real industry benchmarks for your category.

Try it free

Free Resources

ASA Campaign Audit Checklist

FREE PDF

The same 30-point checklist I use with clients. Find budget leaks, fix conversion issues, and optimize your Apple Search Ads campaigns.

Download free

Related Reading

What's a Good CPI for Apple Search Ads?

CPI benchmarks to pair with your budget calculations.

What's a Good TTR for Apple Search Ads?

TTR benchmarks by campaign type from 500+ audits.

App Store Conversion Rate Benchmarks

How your conversion rates compare by category.

ASO Fundamentals Guide

The practical guide to app store optimization in 2026.

Got a tool idea?

I build these based on real problems I see in mobile growth work. If there's a calculation or analysis you wish existed, let me know.

Suggest a Tool
Growth by Kev.

Free mobile growth tools, audit resources, and expert content for app teams. Built from 10 years of real campaign work across 60+ apps.

Quick Links

  • Sandbox
  • Products
  • Blog
  • About
  • Contact
  • Privacy

Connect

hello@growthbykev.com

Get weekly mobile growth insights:

Subscribe to Newsletter

© 2026 Key Metrics 4 Ltd. All rights reserved.

Based in London, working globally.