// the find
OneSignal/OneSignal-Android-SDK
OneSignal makes engaging customers simple and is the fastest, most reliable service to send push notifications, in-app messages, SMS, and emails. This plugin makes it easy to integrate your native Android or Amazon app with OneSignal. https://onesignal.com
The official OneSignal Android SDK for integrating push notifications, in-app messages, SMS, and email into native Android and Amazon apps. This is a client SDK — it talks to OneSignal's backend service, which you pay for. If you're already using OneSignal, this is the thing you drop in.
Support for FCM, HMS (Huawei), and ADM in a single SDK without you wiring up multiple providers yourself. The v5 architecture shows real care: proper DI container, interface-driven design with `IOneSignal`, coroutine-native threading via `OneSignalDispatchers` — not the callback soup of older mobile SDKs. The consistency manager pattern for read-your-writes tokens suggests they've actually thought about the distributed systems edge cases in notification delivery. Active maintenance with e2e CI, CodeQL scanning, and a structured migration guide for the v4→v5 jump.
Vendor lock-in is the whole business model here — the SDK is useless without a OneSignal account, and the 'free tier' has limits that will bite you at scale. The v5 migration advisory is honest about feature parity gaps, which means you may be stuck on v4 in production while v5 is the supported path. The custom DI container (`ServiceBuilder`/`ServiceProvider`) is hand-rolled instead of using Hilt or Koin — it works, but it's one more thing to understand when debugging startup issues. Documentation lives entirely on onesignal.com, not in the repo, so if they ever break that link or change their docs structure, the README becomes a dead end.