Signal Sentinel monitors connectivity conditions in the background and alerts you when the condition you care about is found. Independent voice and data lanes, on-device only, no account required.
Voice and data checks run on separate schedules. Watch one, both, or neither — your call.
Preset or fully custom intervals from 15 minutes up to 24 hours. Match the cadence to the situation.
Adaptive cadence reduces check frequency as your battery drops. Data checks back off first.
Sound, vibration, or silent visual alerts. Stops once you silence it, disable monitoring, or the condition clears.
30-day local event log. Auto-pruned. Excluded from cloud backup. Never sent anywhere.
No sign-up, no profile, no server. Subscription is handled entirely through Google Play.
Turn on voice checks, data checks, or both. Pick an interval that suits the moment.
Scheduled checks use Android WorkManager. Best-effort timing under Android's battery rules.
When the configured condition is found, you get a notification on your terms.
Signal Sentinel does not have a backend. Monitoring history, alert state, and billing cache stay local and are excluded from Android cloud backup. Crash data is the only optional outbound — and only if Firebase is configured for the build.