Template369
Launch your next Flutter startup in 6 weeks — auth, payments, subscriptions, the boring parts done.
What it is
Template369 is a Flutter boilerplate that pre-wires the infrastructure every SaaS and consumer app needs: Firebase auth, Stripe payments, RevenueCat in-app subscriptions, and Cloud Functions — all connected and working before you write your first screen.
Why I built it
After 150+ apps I could recite the setup ritual from memory. New Flutter project. Add Firebase. Wire auth. Connect Stripe. Add RevenueCat. Set up Cloud Functions. Test the subscription flow. Two weeks minimum, often three, before any product code.
I started Template369 because that setup is exactly the kind of work that has no business being done from scratch every time. The configuration is the same. The boilerplate is the same. Only the product is different.
How it works
Template369 ships as a complete, runnable Flutter project. Firebase auth covers email/password, Google, and Apple sign-in out of the box. Stripe handles one-time payments. RevenueCat manages in-app subscriptions across iOS and Android, including receipt validation and entitlement checks. Cloud Functions handle the server-side events — subscription webhooks, auth triggers, and any logic that can’t live on-device.
The code is production-ready, not demo-quality. Over 2,269 developers have shipped with it. The Professional tier costs $350/yr and includes updates as the underlying packages evolve.
What you can do with it
Buy Template369 if you’re building a Flutter SaaS, a consumer subscription app, or anything that takes money. Skip the two weeks of plumbing and spend that time on the thing that makes your app different from every other app.