Monetization is where most iOS apps quietly lose money — a paywall nobody converts on, receipts that don't validate, restores that fail, subscriptions that stay active after a refund.

I build subscription infrastructure that actually holds up in production. All 4 of my App Store apps run on it.

WHAT I BUILD

StoreKit 2 from scratch: products, purchase flow, restore, transaction listener

Server-side receipt validation and App Store Server Notifications v2

Adapty or RevenueCat integration when you want analytics and A/B testing without shipping a new build for every paywall change

Free trials, intro offers, promotional offers, win-back campaigns

Paywall UI in SwiftUI or UIKit — built to be swapped and tested, not hardcoded

Migration from legacy StoreKit 1 to StoreKit 2

WHAT YOU AVOID

Guideline 3.1.1 rejection for a paywall Apple doesn't like

Users who paid and lost access after reinstalling

Revenue you can't explain because nothing is tracked

I test every flow in sandbox before handoff: purchase, cancel, refund, expiry, family sharing, upgrade, downgrade. You get a document listing what was verified.

Tell me what you're selling and I'll tell you the right pricing model for it.