revenuecat Understanding RevenueCat
Phase 0: Intent
Use this skill before writing any RevenueCat code. It gives you the vocabulary and mental model you need so that downstream skills (setup, configuration, purchase flow, entitlements) make sense.
Start here if any of these apply:
- You are new to RevenueCat or coming from a raw Play Billing integration.
- You are unsure which concept maps to which dashboard object.
- You need to decide which downstream skill to invoke for a specific user goal.
Skip this skill if you already know the difference between an Offering, a Package, a Product, and an Entitlement, and you already know that Purchases.sharedInstance is the single entry point.
Phase 1: Orient
Raw Android in-app purchases require three separate systems. RevenueCat folds all three into one SDK plus one dashboard.
| Raw Google Play stack | RevenueCat replacement | Where it lives |
|---|---|---|
BillingClient on the client |
Purchases SDK |
Your Android app |
| Google Play Developer API on your server | RevenueCat backend | RevenueCat managed |
| Real Time Developer Notifications via Cloud Pub/Sub | RevenueCat webhooks | RevenueCat managed, delivered to your server |
The call path is:
Your App
-> Purchases SDK
-> RevenueCat Backend
-> Google Play Developer API
-> Google Play
Your app talks to the Purchases SDK. The SDK talks to Google Play for the purchase UI and to the RevenueCat backend for verification and entitlement storage. Your server side code talks to the RevenueCat backend, not to Google Play directly.
One consequence: RevenueCat sits in the purchase verification path. After a user completes a purchase, the SDK posts the token to RevenueCat before your app sees confirmation. You trade a network round trip for not having to build server side verification yourself.
The four concepts you must know
| Concept | What it is | Where you define it |
|---|---|---|
| Product | A subscription, base plan, or one time purchase | Google Play Console |
| Package | A Product wrapped with a type label (Monthly, Annual, Lifetime, custom). The unit your paywall displays | RevenueCat dashboard |
| Offering | A group of Packages. One Offering is marked Current and returned by offerings.current |
RevenueCat dashboard |
| Entitlement | A logical access level your app checks, such as "pro_access". Products are attached to Entitlements |
RevenueCat dashboard |
CustomerInfo is the runtime snapshot of the user's purchase history and active Entitlements, computed and cached by RevenueCat.
The only two reads you need most of the time
val offerings = Purchases.sharedInstance.awaitOfferings()
val monthly = offerings.current?.monthly
val customerInfo = Purchases.sharedInstance.awaitCustomerInfo()
val hasPro = customerInfo.entitlements["pro_access"]?.isActive == true
isActive already resolves the seven Play subscription states (ACTIVE, IN_GRACE_PERIOD, ON_HOLD, PAUSED, CANCELED, EXPIRED, PENDING) on the server side. You do not reimplement that logic on the client.
The singleton
Purchases.sharedInstance is the single entry point. You configure it once at app startup:
Purchases.configure(
PurchasesConfiguration.Builder(context, "your_api_key")
.appUserID("optional_user_id")
.build()
)
Unlike BillingClient, the singleton does not require you to manage connection state. It reconnects and queues calls for you.
What RevenueCat does not replace
- Google Play Console. You still create products, base plans, and offers there.
- Your app UI. You still build the paywall and display prices. RevenueCat supplies the data.
- Your authentication system. You bring your own user IDs and pass them to the SDK.
The tradeoff
You offload verification complexity and take on a dependency. If the RevenueCat backend has an outage, purchase verification is affected. Two mitigations exist and they are different:
| Feature | What it does | When it kicks in |
|---|---|---|
Disk cache of CustomerInfo |
Returns the last known server state for entitlement checks | Automatic, always on |
| Offline Entitlements | Computes entitlements on the device from local Play Store purchases | Only when you explicitly configure it |
Neither is a full substitute for a reachable backend. Use both where they apply.
Phase 2: Map the user goal to a downstream skill
Once you have the model above, pick the next skill based on what the user actually wants to do.
| User goal | Next skill |
|---|---|
| Install the SDK, wire up Gradle, add permissions, configure the Play Console product | revenuecat/setup |
Call Purchases.configure, pass an appUserID, set log level, attach attributes |
revenuecat/configuring-the-sdk |
Fetch Offerings, show a paywall, call purchase, handle the result |
revenuecat/purchase-flow |
Check customerInfo.entitlements["..."]?.isActive, gate features, listen for updates |
revenuecat/entitlements-and-customerinfo |
| Identify, alias, or log out a user | revenuecat/user-identity |
| Handle restore purchases, cross device, promo codes | revenuecat/restore-and-recovery |
| Receive server side events from RevenueCat | revenuecat/webhooks |
| Debug a specific purchase, receipt, or entitlement in production | revenuecat/debugging |
If the user's goal does not match any row, stay here and keep clarifying intent before routing.
Phase 3: Sanity check
Before you leave this skill and route to a downstream one, confirm out loud:
- You can name which of the three raw pillars (client billing, server Play Developer API, RTDN) the user's question touches.
- You can state whether the user is asking about a Product, a Package, an Offering, or an Entitlement. These are not interchangeable.
- You know whether the user needs
Offerings(what to sell) orCustomerInfo(what the user already owns). Most confusion comes from mixing these two. - You have picked exactly one downstream skill to invoke next, or you have a concrete clarifying question.
If any of the four fail, reread Phase 1 or the chapter before proceeding.