Payment and Billing Integration

  • Qonversion - All-in-one cross-platform subscription management platform offering analytics, A/B testing, Apple Search Ads, remote configs, and growth tools for optimizing in-app purchases and monetization. Compatible with iOS, Android, React Native, Flutter, Unity, Cordova, Stripe, and web. Free up to $10k in monthly tracked revenue.
  • ParityVend – Automatically adjust pricing based on visitor location to expand your business globally and reach new markets (purchasing power parity). The free plan includes 7,500 API requests/month.
  • Glassfy – In-app subscriptions infrastructure, real-time subscription events and out-of-the-box monetization tools on iOS, Android, Stripe and Paddle. Free up to $10k monthly revenue.
  • Adapty.io – One-stop solution with open-source SDK for mobile in-app subscription integration to iOS, Android, React Native, Flutter, Unity, or web app. Free up to $10k monthly revenue.
  • CoinMarketCap — Provides cryptocurrency market data including the latest crypto and fiat currency exchange rates. The free tier offers 10K call credits/month.
  • CurrencyFreaks — Provides current and historical currency exchange rates. Free DEVELOPER plan available with 1000 requests/month.
  • CoinGecko — Provides cryptocurrency market data including the latest crypto exchange rates and historical data. The demo api comes with a stable rate limit of 30 calls/min and a monthly cap of 10,000 calls.
  • CurrencyApi — Live Currency Rates for Physical and Cryptocurrencies, delivered in JSON and XML. The free tier offers 1,250 API requests/month.
  • currencylayer — Reliable Exchange Rates and Currency Conversion for your Business, 100 API requests/month free.
  • exchangerate-api.com - An easy-to-use currency conversion JSON API. The free tier updates once per day with a limit of 1,500 requests/month.
  • FraudLabsPRO — Help merchants to prevent payment fraud and chargebacks. Free Micro Plan available with 500 queries/month.
  • FxRatesAPI — Provides real-time and historical exchange rates. The free tier requires attribution.
  • Moesif API Monetization - Generate revenue from APIs via usage-based billing. Connect to Stripe, Chargebee, etc. The free tier offers 30,000 events/month.
  • Nami ML - Complete platform for in-app purchases and subscriptions on iOS and Android, including no-code paywalls, CRM, and analytics. Free for all base features to run an IAP business.
  • RevenueCat — Hosted backend for in-app purchases and subscriptions (iOS and Android). Free up to $2.5k/mo in tracked revenue.
  • vatlayer — Instant VAT number validation and EU VAT rates API, free 100 API requests/month
  • Currencyapi — Free currency conversion and exchange rate data API. Free 300 requests per month, 10 requests per minute for private use.