Prerequisites

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This is the minimum you need before adding Bubbl.

Android SDK levels

• Use minSdk 26 or higher.
• Use targetSdk 34 or higher.

WhyBubbl depends on modern background location, notification, and WorkManager APIs that are not reliable on lower SDKs.

Kotlin and Java

• Kotlin 1.8+.
• Java 11+.

WhyThese match the SDK’s compiled target and avoid desugaring conflicts.

Firebase

• You must create a Firebase project and include google-services.json.

WhyBubbl uses Firebase Cloud Messaging (FCM) for push notifications.

Play Services

• Location and Maps libraries are required if you want map‑based geofence visualization.

WhyBubbl tracks device location to refresh campaigns and geofences.

Host app referenceThe internal host app uses:

• compileSdk = 36, minSdk = 27, targetSdk = 36.
• Kotlin 2.0, Java 11.

These are safe to use, but you can follow the minimums above if your app cannot yet move that far.