Sentinel: Notification Radar

WHAT IS SENTINEL FOR?

Have you ever missed an important message on a messaging app?

Have you ever felt frustrated because someone you wanted to reach had their phone on silent and didn't hear your messages?

Are you a fan of strategy mobile games like Whiteout Survival, Last War, or Age of Z, and have you lost resources (and months of work) just because you didn't notice an enemy attack in time?

Are you waiting for an important call or message, but you're in a meeting with your phone on "Do Not Disturb" and you miss the urgency?

Sentinel was built to solve these problems.

🔔 HOW IT WORKS

Sentinel monitors notifications from the apps you choose, and when it detects the keywords you've configured, it triggers a real sound alarm: dedicated volume, custom ringtone, and silent mode bypass to make itself heard even with your phone in your pocket or screen off.

You can even automatically activate a smart device, like a light or external sound signal, to be alerted in the real world.

✨ PERFECT FOR

- Never missing important messages from specific contacts
- Getting instantly alerted to critical or urgent events
- Monitoring game notifications at night or while busy
- Cutting through notification noise and focusing on what matters
- Receiving immediate alerts even with phone on silent
- Taking full control over what truly deserves your attention

⚙️ KEY FEATURES

- Smart notification monitoring for any app
- Custom keywords on title and message body
- AND/OR operators for precise combinations
- Sound alarms with system ringtone or custom audio (MP3, WAV, M4A, OGG, AAC, FLAC)
- Full-screen alarm overlay above any app
- In-app alert banner with instant stop button
- Configurable time windows for each card
- Anti-spam filter to auto-disable cards triggered too often
- Import and export cards between devices
- Complete event log
- Automatic light and dark mode
- 12 supported languages

⭐ SENTINEL PREMIUM

Unlock the full potential with a one-time purchase:
- Unlimited monitoring cards (free: max 3)
- Smart device activation via HTTP
- Import shared cards from other users

🔒 PRIVACY AND SECURITY

Sentinel respects your privacy: all data stays on your device, nothing is sent to external servers. The full privacy policy is available in 12 languages.

🎮 FOR MOBILE GAMERS

Sentinel is especially loved by the mobile strategy gaming community: Whiteout Survival, Last War: Survival, Age of Z, Frost & Flame, and more. Set up alarms for enemy attacks, resource collection, timed events, and never miss a moment of the game.

📡 WHAT KIND OF APP IS SENTINEL?

Sentinel is a productivity and accessibility tool that acts as a "notification radar": it lets you filter the constant noise of information and react only to what truly matters to you.

Try it free. Turn your smartphone into a real personal monitoring station.

Recent changes:
Technical update: Android 16 compatibility and updated in-app purchase library.