IOS:
Version 2.1.2 (12/18/2023)

Support for French and Dutch.
Minor bugs fixes.

IOS App and firmware updates

IOS:
Version 2.1.7 (02/26/2024)

Fixed an issue where if a move was made while the app was calculating move qualities the game would stall.
Fixed an issue where if the board was turned on after a game was started in the app the game couldn't be played on the board.
Version 2.1.6 (02/23/2024)

Improved connectivity to the ChessUp board.
Fixed an issue with Lichess aborted games.
Fixed an issue where multiple copies of the same Lichess game was being saved.
Fixed an issue where some games weren't being saved.
Version 2.1.5 (01/29/2021)

Fixed duplicate LiChess Friend Issue
Fixed castling issue with takeBacks, rewinds, and "Sync To Board" while BLE is connected
Improved starting a game from a loaded Custom FenString
The game host Sends "Game End" to Opponent
Implemented TimeSync for ChessUp Remote Games
Version 2.1.4 (01/19/2024)

Added the ability to delete games that were played on the board in stand alone mode.
Supports new "No Lights Mode" where when a piece is touched the legal moves are not illuminated (Requires firmware version 1.9.2).
Supports new "Post Move Hint" feature where the quality of the move (indicated by the color of the LED) is not shown until after the move has been made (Requires firmware version 1.9.2).
Now allows the connecting to the board after a Chess.com game has been started.
Fixed issue with failing to save OTB AI incomplete games.
Corrected a pgn creation issue.
Other minor bug fixes.

Firmware
Version 1.9.1 (1/18/2024)

Supports new "No Lights Mode" where when a piece is touched the legal moves are not illuminated (Requires iOS 2.1.14 or Android 2.1.15 or greater).
Supports new "Post Move Hint" feature where the quality of the move (indicated by the color of the LED) is not shown until after the move has been made (Requires iOS 2.1.14 or Android 2.1.15 or greater).
Fixes a bug where after deleting a board game in the app the game would reappear (Requires iOS 2.1.14 or Android 2.1.15 or greater).

On my board there is firmware 1.9.2 installed although it is still not listed in the update log on the chessup website.