Pebble 2 Duo - only

Older Pebbles cannot upgrade to this version of PebbleOS

What should work in PebbleOS for Pebble 2 Duo🤞

Time
Notifications
- dismissing notifications on phone from watch
- (Android only) replying with emoji or canned replies
Calendar (configure in mobile app, no actions or invites yet)
Music control
Phone calls
Alarms
All settings (vibration, quiet time, 12/24hr, etc)
Watchfaces
Apps
Appstore and locker (via Rebble.io sign in)

What isn’t working or built yet 🤦

Power consumption optimization on P2D (7 days of battery life, then 30 days)
Backlight strength controlled by ambient light sensor on P2D
Voice input on P2D
Compass on P2D
Speaker, barometer and magnetometer on P2D
Send Text app

PebbleOS changelog for Pebble 2 Duo

| Sept 9, 2025 | PebbleOS v4.9.9-core45 | - Updated time zone database

Improved accelerometer overall stability
Experimental support for magnetometer
Fixed issues with time sync causing health data loss.
Multiple minor fixes for reported issues (e.g., calendar reminder issues) - Keep reporting! | | --- | --- | --- | | | PebbleOS v4.9.9-core35 | - Some accelerometer improvements/fixes (e.g., spurious shake events)
Standby mode is now enabled by default.
Fixed some BLE issues related to GATT notifications. | | | PebbleOS v4.9.9-core33 | - Initial experimental accelerometer support (feedback welcome!) - Thanks Matthew Wardrop for the initial work and testing!
Enabled the ‘Workout’ app.
Fixed some crashes when the microphone was being used.
Decreased logging verbosity as it seems to cause stability issues in some scenarios. | | | PebbleOS v4.9.9-core32 | - Initial microphone support (not yet in mobile app)
Fixed some mobile app reconnect issues on iOS.
Potentially fixed some crashes caused by recently increased logging. | | | PebbleOS v4.9.9-core31 | - Fixed issues with ANCS (iOS) being unreliable.
Adjusted BLE advertising parameters (follows Apple accessory guidelines)
Adjusted BLE connection parameters. This should potentially fix some connectivity issues observed in the field.
Watch now detects BLE service changes, so it can rediscover if needed (e.g., if the app crashes or is updated).
Fixed occasional crashes when toggling airplane mode.
Removed “airplane toggle” workaround during service discovery as root cause has been fixed.
Implemented BLE CCCD persistence
Improved logging in a few areas so we will now catch more details on new/existing issues. | | | PebbleOS v4.9.9-core22 | - Fixed issue where ‘Fully Charged’ popup could appear after partially charging the battery.
BLE repeat pairing is now supported. | | | PebbleOS v4.9.9-core21 | - Fixes issues with reported/notified values with BLE BAS service
Other minor charging current tweaks | | | PebbleOS v4.9.9-core19 | - Watch exposes GATT Battery Service; the mobile app will now report the watch battery level.
Battery model has been adjusted to potentially resolve some issues like the percentage stuck at 100%.
PMIC will now handle charging fully discharged batteries.
Added extra logging for battery constants and connectivity actions so we can collect more metrics from devices in the field.
Notifications now have an alternative design option. | | | PebbleOS v4.9.9-core18 | Bluetooth workaround - auto-cycle airplane mode if service discovery fails | | | PebbleOS v4.9.9-core17 | Battery life improvements - should get ~4 days battery life now! | | | PebbleOS v4.9.9-core14 | Battery % now shows actual %, rather than just 10% chunks. | | | PebbleOS v4.9.9-core13 | Fixes Bluetooth stability issue with core12, but reverts some battery life improvements (back to ~1 day battery life) |

Important

If anything isn’t working, and it isn’t listed below as not working, please report a bug in the app! Try to connect to your watch before reporting, so that the app can fetch watch logs (cycling airplane mode on the watch if required to get it connected). We might not get back to you, but we read every report.