Ship a broken build? Block it in seconds, not days. Force-push critical updates, message users by version, and monitor adoption — all without waiting for app store review.
Visit semaphr.comBlock any app version instantly. A broken build reaches users? Shut it down in seconds, not days. Users see a clear message explaining what happened. No app store review required.
Push users to the latest version without waiting for app store prompts. Set minimum required versions per platform. Users on outdated builds get a non-dismissible upgrade screen.
Send targeted messages to specific app versions. Announce maintenance windows, new features, or known issues. Schedule delivery, customize appearance, preview before sending.
See which versions your users are running in real time. Track adoption of new releases. Identify version fragmentation before it becomes a support problem.
Lightweight iOS, Android, and React Native SDKs that integrate in under 10 minutes. One initialization call. Handles all UI presentation, caching, and retry logic automatically.
Native iOS SDK with background refresh and minimal battery impact.
Native Android SDK with lifecycle-aware version checking.
Cross-platform SDK for React Native apps with the same capabilities.
Backend API handling message delivery, version rules, and analytics ingestion.
Dashboard for managing versions, messages, and monitoring adoption metrics.
Relational storage for version rules, message history, and analytics data.
We built kill switches and force-update flows dozens of times for different clients. Semaphr solved it permanently — one platform, every app, every team.
When a broken build is live, every minute counts. The entire system was designed for instant response — from dashboard click to user-facing block screen.
We use Semaphr on every app we ship. Building a product we rely on daily keeps the quality bar high and the feedback loop tight.