Piiko Notes · For app builders
Small notes.
Better decisions.
Growth stories and practical thinking for people
building iOS apps and games.
Big apps. Useful lessons.
Growth stories
Growth stories
Why WeWard’s French growth playbook stalled in the US
A clear promise, a new audience, and a reason to join in.
Growth stories
Duolingo’s 52.7M daily users: the habit behind the hype
One lesson, a return visit, a reason to upgrade. Inside the daily habit.
Growth stories
Clash Royale’s comeback: how an old game found new players
Michael Bolton, Jynxzi and a game people wanted to return to.
Find something worth building
Product thinking
Product thinking
How to find mobile app ideas worth testing
Notice a recurring problem. Turn it into a small, testable bet.
AI & product
Does your mobile app need an AI agent?
Start with one useful task. Make progress recoverable and results measurable.
Game development
Moving from EDM4U to Unity EDM: a migration checklist
Change the dependency manager. Prove that the game still works.
AI & development
Make your Android UI easier for AI to change
Clear boundaries. Smaller tasks. Less work left for the reviewer.
Start with the numbers
Unit economics
iOS monetization
Apple’s EU checkout fees: when cheaper pays less
A €0.20 saving per payment can disappear before the purchase is complete.
Unit economics
How to calculate mobile app LTV
Start with one cohort. Find out what an install has actually earned.
Acquisition
LTV vs. CAC: what can you afford to spend?
Turn user value into a spending decision. Keep the units honest.
Cash & growth
When does your app pay back its acquisition cost?
A valuable user still takes time to pay you back. Measure the wait.
Measure & monetize
Product analytics
Acquire & learn
Growth
Paid acquisition
Meta app ads: a first-campaign checklist
Connect the measurement. Test a promise. Learn from the cohort.
Benchmarks
Which mobile app benchmarks should you use?
A useful comparison starts with knowing who is being compared.
Game distribution
Should you bring your Android game to car screens?
A new distribution option. Five checks before committing a small team.
A small tool, a clearer picture
What is an install worth?
Put your own numbers into the LTV calculator.
Open calculatorConcise explanations. Worked examples. Sources you can check.