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Unified Web & Mobile Subscription API
A single API layer that normalizes subscription data across Apple App Store, Google Play, and web payment gateways. It provides a unified view of customer access regardless of where they purchased.
Why this matters
You are building a cross-platform application and want users to be able to subscribe on your website, iOS app, or Android app. You quickly realize that web billing platforms treat mobile in-app purchases as an afterthought. You end up building complex, custom backend logic to reconcile Apple receipts, Google tokens, and Stripe webhooks just to figure out if a user has active premium access. You need a single API endpoint that simply tells you 'is this user premium?' regardless of where they gave you their money.
- · Built for Cross-platform app developers who sell subscriptions on both web and mobile stores..
- · Most likely monetization: SaaS subscription based on Monthly Tracked Revenue (MTR).
The Pain · Narrative
You are building a cross-platform application and want users to be able to subscribe on your website, iOS app, or Android app. You quickly realize that web billing platforms treat mobile in-app purchases as an afterthought. You end up building complex, custom backend logic to reconcile Apple receipts, Google tokens, and Stripe webhooks just to figure out if a user has active premium access. You need a single API endpoint that simply tells you 'is this user premium?' regardless of where they gave you their money.
Score Breakdown
Market Signal
Go-to-Market
Indie developers and small studios building cross-platform apps (React Native/Flutter) with web companions.
~20,000 cross-platform app businesses.
Developer communities for React Native, Flutter, and Expo.
$49/month for up to $10k in tracked monthly revenue.
15 developers actively sending both web and mobile receipts to the API.
MVP Scope · 1–2 weeks
- Set up a serverless backend to handle incoming API requests
- Implement Apple App Store server-to-server receipt validation logic
- Implement Google Play Developer API for subscription verification
- Create a unified database schema to map different platform IDs to a single internal user ID
- Build a simple dashboard showing active subscriptions across platforms
- Integrate Stripe webhooks to capture web-based subscription events
- Build the core `/entitlements` endpoint that returns a normalized true/false access status
- Develop SDK wrappers or code snippets for Node.js and Python backends
- Implement basic webhook forwarding so developers get a unified event when a subscription renews anywhere
- Publish a technical blog post on the pain of reconciling Apple and Stripe data to drive SEO traffic
Differentiation
Why This Might Fail
Self-rebuttal — the most important trust signal
- 1RevenueCat already dominates the mobile subscription space and is expanding its web billing capabilities.
- 2Apple and Google frequently update their server-to-server notification schemas, causing high maintenance overhead.
- 3Many mobile-first apps simply force users to subscribe via IAP, ignoring web billing entirely to avoid complexity.
Evidence Summary
How AI synthesized this insight — no verbatim quotes
A community member specifically asked how the platform handles Apple and Google in-app purchases alongside web payments. They highlighted a common frustration: most billing tools are built with a web-first mindset, leaving mobile app billing as a neglected afterthought that developers must manually reconcile.
Action Plan
Validate this opportunity before writing code
Recommended Next Step
Validate
Promising signals, but needs confirmation. Create a landing page, collect email sign-ups, then decide.
Landing Page Copy Kit
Ready-to-paste copy based on real Reddit community language — no editing required
Headline
Unified Web & Mobile Subscription API
Sub-headline
A single API layer that normalizes subscription data across Apple App Store, Google Play, and web payment gateways. It provides a unified view of customer access regardless of where they purchased.
Who It's For
For Cross-platform app developers who sell subscriptions on both web and mobile stores.
Feature List
✓ Apple App Store receipt validation ✓ Google Play Billing integration ✓ Stripe webhook ingestion ✓ Unified customer subscription endpoint ✓ Cross-platform churn analytics
Where to Validate
Share your landing page in r/Product Hunt · saas — that's exactly where these pain points were discovered.
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