---
title: "Pebble SDK 3.9-beta5 - Changelog"
canonical_url: https://developer.repebble.com/sdk/changelogs/3.9-beta5/
last_updated: 2026-10-11
sdk_version: 4.33.1
---
# Pebble SDK 3.9-beta5 - Changelog

Source: https://developer.repebble.com/sdk/changelogs/3.9-beta5/

_Release Date: January 19 2016_

This is a pre-release SDK, containing a preview of the new Pebble Health API.

### Known Issues

- `HealthLightLevel` will be renamed to [`AmbientLightLevel`](https://developer.repebble.com/docs/c/Foundation/Event_Service/HealthService.md#AmbientLightLevel "AmbientLightLevel") before SDK 3.9 ships.
- Bluetooth may be more unreliable in this beta release.

### Changes to Firmware

- Resolved confusion caused by manipulating the window stack while it is animating.
- Fixed a crash when enabling text pagination on aplite.
- Improved the reliability of smartstrap communication when the system is busy.
- Fixed calendar pins sometimes omitting the location on aplite.
- Reduced the memory overhead for PNG decompression to 1152 bytes (plus space for both the compressed and decompressed versions of the image).
- Fixed an issue causing "call back" on missed call pins on iOS to not actually call back.
- Fixed an issue causing sleep graphs to not be drawn at all on the deep sleep screen in the Health app unless there was deep sleep to display.
- Multiple timezone fixes, including Uruguay and Cancun.
- Made system watchface transitions snappier on Pebble Time.
- Redesigned the watch-only mode watchface.
- Changed the low-battery percentage warnings to time estimates.
- Added U+1F3B5 MUSICAL NOTE 🎵 and U+1F381 WRAPPED PRESENT 🎁 to the notification font.
- Added an indicator of picture notifications on iOS.
- Redesigned Tic-Toc on the Rose Gold Pebble Time Round.
- Moved the hands on Tic-Toc on Pebble Time Round one pixel to the left.
- Assorted health tracking improvements.
- Assorted stability improvements.
- Assorted localization improvements.

### Changes to SDK

- Added the new [Health API](https://developer.repebble.com/docs/c/Foundation/Event_Service/HealthService.md "HealthService")! 
  - This enables you to read information from Pebble Health and include it in your app or watchface.
  - We are interested in feedback on this API! Let us know what you think on the [developer forum](https://forum.repebble.com/c/developers-ask-questions-and-get-help/7)!
- Fixed an issue introduced in 3.8.2 causing some _successful_ font builds to hang the build process indefinitely.
- Added [`PBL_IF_MICROPHONE_ELSE`](https://developer.repebble.com/docs/c/Foundation/Dictation.md#PBL_IF_MICROPHONE_ELSE "PBL\_IF\_MICROPHONE\_ELSE") and `PBL_IF_SMARTSTRAP_ELSE` macros, for consistency with [`PBL_IF_COLOR_ELSE`](https://developer.repebble.com/docs/c/Graphics/Graphics_Types.md#PBL_IF_COLOR_ELSE "PBL\_IF\_COLOR\_ELSE") and friends.