AlertU

Unstable Systems

About this app

Stop missing the notifications that matter. AlertU watches your notification shade for words you choose and rings, speaks, or vibrates so urgent messages stand out—even when your phone is on silent.

• Keyword rules — Match words or phrases in notification text from Gmail, Messages, Slack, marketplace apps, and more
• Per-app filtering — Monitor all apps or only the ones you pick
• Voice or sound alerts — Text-to-speech, custom tones, and volume control
• Schedules — Turn rules on for work hours, nights, or on-call shifts
• STOP overlay — End a loud alert instantly from the screen
• History — See what matched and when (stored on your device)
• Rules backup — Export and import your alert rules as JSON

WHO IT'S FOR
On-call engineers, parents, caregivers, small-business owners, support teams, and anyone flooded with notifications who still needs to catch urgent ones fast.

HOW IT WORKS
AlertU uses Android's notification access to read what appears in your status bar—not full email bodies or chat threads unless that exact text is shown in the notification. Gmail often shows only the subject or a short summary. Before you write keywords, pull down the shade and check what the app actually posts.

PRIVACY & DATA
• Rules and History stay on your phone
• No account required
• Optional diagnostics (off by default) — see our privacy policy
• Request data deletion: https://alertu.netlify.app/delete-data/

SETUP
You'll enable notification access and optional permissions in Setup. AlertU is built for reliability: master switch, per-rule toggles, and backup when you change phones.

Questions or feedback: [e-mail]

What’s new

• Create a new alert rule from a notification in the shade
• Watch several apps in one Card rule (Notifications from)
• Home cards show how many apps a rule is watching
• First-run setup asks for unrestricted battery, and opens each sender app’s notification settings
• Adds AlertU to the Home screen after a fresh install
• More reliable Messages sender matching, and fewer false alerts from ongoing/system shade posts