A Bell as a Sentry, Keeping You Safe at Heart.
SafeBell turns your spare phone into a unique, privacy-first sensor platform. No subscriptions. No cloud. It has two distinct souls:

1. Sentry Mode (The Fun One)
Hang it on a hotel door handle, tuck it into your luggage, or… just leave it on your desk while charging and wait for a curious friend to touch it.
The moment someone moves the phone, it blasts a hilarious alarm — guaranteed to make them jump!
(A short built-in grace period means you won’t accidentally set it off yourself.)

Perfect for:
• Catching a snooping roommate
• Protecting your tent while camping
• Pranking your friends
• Or simply finding out who moved your bag on the train.

2. Home Safety Mode (The Heart of SafeBell)
Crafted over a year of dedicated engineering, this mode is designed for anyone living alone — empty-nesters, independent elderly parents, or solo-living young adults.
Think of it as an absence alert: if no movement is detected during your custom window (e.g., if you're stuck in the bathroom), your phone will quietly reach out to your Trusted Circle for you. No wearables. No daily taps. No creepy camera surveillance. Just an old phone, quietly keeping watch. It gives peace of mind to both those who live alone and those who care about them from afar.

Why would young people download SafeBell?
Because it’s fun. But as you play with it, you’ll discover something else:
It can also help you keep an eye on your aging parents — or help you feel more secure when you’re living on your own.

Privacy? We don’t touch your data.
• Zero cameras, zero microphones
• No behavior logs uploaded anywhere — ever
• Raw movement data stays 100% local
• No account registration required

Other things you’ll love:
• Hardware Upcycling: Runs smoothly on legacy smartphones
• Customizable Active Windows: Tailor specific monitor periods to fit your exact routines
• Pre-Alert Delay: Sentry mode features a brief local chime so you won’t scare yourself

SafeBell is an indie tool built for two kinds of people: those who live alone, and those who love a good laugh.

Download SafeBell today. First, scare your friends. Then slowly realize what it truly protects: you and the people you care about.

SafeBell Development Team

Additional Information