🔁 Solution

Subscription System Development

Monthly-billed SaaS, subscription box, premium membership, online course access — if you run a subscription business model, you need solid infrastructure. Automated card charging, plan upgrade/downgrade, free trial → premium conversion, discount codes, prorated invoicing, failed payment → smart retry, customer portal (self-serve subscription management), churn analytics. We integrate Stripe, iyzico and RevenueCat (mobile) — separately or together.

What we offer

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Auto Card Billing

Monthly auto-charge. PCI-compliant tokenized card storage. Failed payments: 3 retries + customer notification.

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Plan Management

Free → Pro → Enterprise. Upgrade prorated (unused month refunded), downgrade starts next cycle.

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Trial + Discounts

14-day free trial, auto-convert to premium. 20% annual discount, coupon codes, referral programs.

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Churn Analytics

Why are subscribers canceling? Reason collection, win-back campaigns, MRR (monthly recurring revenue) tracking.

Stripe vs iyzico vs RevenueCat

Local-only SaaS: iyzico recurring — local currency, installment-free, auto e-invoice integration. ~2% commission.

Global SaaS: Stripe Billing — 135+ currencies, Stripe Tax for automatic VAT/sales tax, advanced subscription logic (paused, trial extended, etc.). ~3% commission.

Mobile Apps (App Store / Play): RevenueCat — unifies App Store and Play Console subscription management, receipt validation, sandbox testing, A/B paywall tests. Apple/Google 30% fee not included.

Hybrid (web + mobile): All three — Stripe on web, RevenueCat on mobile, iyzico locally. Subscribe once, active everywhere. Cross-platform sub.

Critical features: Failed payment recovery (smart retry), dunning emails (payment reminders), customer portal (self-manage subscription), prorated upgrades, granular roles.

Frequently Asked Questions

How much of churned customers can be saved?

Depends on sector. SaaS average: 5-8% monthly churn (50-80% annual). Good sub-models hit 2-3%. Win-back campaigns help.

GDPR compliance for subscriptions?

Customer data (excluding card) on your servers, card data with iyzico/Stripe. When user asks to delete subscription, all data wiped (excluding legally required retention).

Free trial conversion rate?

Industry average 15-25%. Good paywall design + onboarding pushes to 30-40%. We A/B test continuously.

How to avoid Apple/Google 30% fee?

Digital subscriptions in apps must use Apple/Google IAP (30%). Physical goods or services (in-person visits, books, off-app meetings) can use own payment system.

Is this solution right for your business?

30-minute free discovery call. We reply within 1 business day.

Let's Talk →