---
title: "Pebble SDK 4.0-rc20 - Changelog"
canonical_url: https://developer.repebble.com/sdk/changelogs/4.0-rc20/
last_updated: 2025-02-25
sdk_version: 4.33.1
---
# Pebble SDK 4.0-rc20 - Changelog

Source: https://developer.repebble.com/sdk/changelogs/4.0-rc20/

_Release Date: August 29 2016_

This is a developer release candidate for SDK 4.0. No firmware is provided.

### Changes to Firmware

- Apps now correctly launch when installed in the SDK shell.
- Rocky bugfixes.
- Other bugfixes.

### Changes to SDK

- This SDK will not install in any pebble tool prior to 4.4-rc1.
- Corrected outdated AppGlance-related definitions in the aplite compatibility header.

### Known Issues

- Using system icons for appglances is currently broken. Using custom icons for them, however, works fine.
- `pebble gdb` is currently broken.