Fitbit official app, which has been recently released to Windows Phone adds Transparent Tile option in its first update and there are many fixes too.
Changelog:
New Features
* Transparent Live Tile
* Switch to Enable/Disable Transparent Live Tile* “Whats New” Link in Settings
Fixes
* Improvements to new account creation
* General design refinements
* Friends leaderboard now centers on the user
* Number of alarms in device tile now accurate
* Fixes for Time Zone detection and conversion logic
* Improved Stability on certain screens
* Fixed weight log summaries calculation
* Other minor bug fixes
OneDrive has also seen a minor but important update fixing the broken Photo Hub integration in its last update.
