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 ## Payment and Billing Integration
 
   * [Qonversion](http://qonversion.io/) - 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](https://www.ambeteco.com/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](https://glassfy.io/) – 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](https://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](https://coinmarketcap.com/api/) — Provides cryptocurrency market data including the latest crypto and fiat currency exchange rates. The free tier offers 10K call credits/month.