Last updated: October 20th

Looking for the Pebble mobile app changelog?

This is for Pebble 2 Duo version of PebbleOS 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
• Compass
• Voice input
• 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 🤦

• Battery life on on Pebble 2 Duo is not fully optimized yet. Expect 10-14 days of battery life. Soon we’ll optimize it for 30 days of battery life with a firmware upgrade.
• Backlight strength controlled by ambient light sensor
• Speaker and barometer on P2D
• Send Text app

PebbleOS changelog for Pebble 2 Duo

| Oct 20, 2025 | PebbleOS v4.9.65-stop0 | - Longer battery life, up to 14 days are expected! | | --- | --- | --- | | Oct 8, 2025 | PebbleOS v4.9.63 | - Improved microphone recording quality

• Fixed some boot time crashes while the file system was being setup
• Further refinements to accelerometer failure handling
• Improved display data transfer performance
• New backlight toggle application
• Serial console is now disabled by default on release builds. | | Oct 2, 2025 | PebbleOS v4.9.9-core59 | - Add ambient light threshold setting
• Some more accelerometer tweaks | | Sept 26, 2025 | PebbleOS v4.9.9-core57 | - Fix issue where steps and sleep were not counted correctly | | Sept 22, 2025 | PebbleOS v4.9.9-core52 | - Increase microphone gain and implement automatic gain control
• More Accel fixes for backlight triggers | | Sept 17, 2025 | PebbleOS v4.9.9-core47 | - Fixed issue that caused accelerometer to stop detecting steps/sleep/wrist movement | | 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.