The app for your smart #
Take full control of your smart # car, easily, instantly, everywhere.
Supports smart #1 · smart #3 · smart #5
Everything your smart # needs.
Built from the ground up for iPhone. Fast, focused, and respectful of your data.
Digital Key
Lock, unlock, and start your smart # from your iPhone over Bluetooth.
Key Sharing
Share secure access with family or friends, with unlock or remote control rights.
Multi-Car Garage
Manage more than one smart # from a single app. Switch cars in a tap.
Charging Control
Live monitor, remote start and stop, charge limits, and scheduled sessions.
Comfort Ready
Preconditioning, individual seat heating, and defrost before you get in.
CarPlay, Siri & Shortcuts
Full CarPlay support, plus a dozen Siri Shortcuts ready for your automations.
Widgets & Control Centre
Home screen widgets and iOS 18 Control Centre actions: lock, unlock, precondition.
Private by Design
Hello # has no server. Your data stays private on your device.
Designed for your daily drive.
Your key, on your iPhone.
Lock, unlock, ventilate, pop the frunk, flash the lights. No extra hardware, no compromises on security.
- ✓ Bluetooth proximity controls, straight from your pocket
- ✓ Keys encrypted and stored in the iOS keychain
- ✓ Share access with family and friends in a few taps
Support the journey
If you find Hello # useful, consider giving us a little boost. Developers run on coffee, and your support helps keep the app alive and evolving.
Built with the community.
Over 200 beta testers help shape Hello #. Regular updates bring new features and improvements, driven by what users actually need.
Want to join the beta, or help translate the app into your language? Hello # already ships in 8 languages and we welcome more.
Get in touch →