TrackrPro
How we built a Swift-native iOS fitness app with Stripe subscription billing and StoreKit 2 — growing to 40,000 paying subscribers in 8 months with a 94% trial-to-paid conversion rate.
“The subscription architecture Solyio built handles everything — trials, upgrades, downgrades, and failed payments — without us touching a line of code. It just works.”
— Founder, TrackrPro
The Challenge
The fitness app had no monetisation strategy — users could access everything for free, and the team had no way to implement or manage subscriptions without breaking the UX.
Zero Monetisation
With 80,000 free users and no revenue, the team needed a frictionless subscription paywall that converted without alienating the existing user base.
Subscription State Chaos
Competitors were managing subscription states (active, paused, cancelled, trial) with bespoke backend code that broke constantly — the client needed something bulletproof.
The iOS Monetisation Engine
We engineered a dual-track monetisation system using Stripe for web payments and StoreKit 2 for App Store billing — with a unified entitlement layer across both.
Stripe Subscription Billing
Integrated Stripe Billing with 7-day free trial, annual/monthly plans, and smart dunning — automated retry logic recovered 34% of failed payments that would otherwise churn.
StoreKit 2 In-App Purchases
Native StoreKit 2 integration for App Store subscriptions with real-time receipt validation, promotional offers, and family sharing — fully compliant with App Store guidelines.
Unified Entitlement Layer
A backend entitlement service syncs subscription state from both Stripe and StoreKit 2 in real time — users who pay via web or App Store get instant access, zero delays.
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Stripe Subscription Billing?
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Business
Impact
TrackrPro went from zero revenue to a profitable subscription business generating $480K MRR in under a year.
94% Trial-to-Paid Conversion
A carefully designed 7-day trial with progressive feature unlocking and smart push notifications drove one of the highest trial conversion rates in the fitness category.
34% Failed Payment Recovery
Stripe's smart retry logic and our custom dunning sequences automatically recovered subscriptions that would otherwise have churned silently.
Monetisation That Respects the User
TrackrPro shows that a well-architected subscription system doesn't just make money — it builds trust, reduces churn, and turns free users into loyal paying customers.
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