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.

Next firmware out since 26.06.2024…
The Version 1.9.2 in my board is still not listed on their website.
Version 1.9.3 (6/28/2024)

Improved speed of built-in AI.
Improved connectivity to the phone.
Added support for the new opening book feature in the app. The green pawn icon on the board indicates that the player is still in book.
Fixed a bug where doing/undoing a castle while playing the AI caused the AI to play illegal moves.
Fixed a bug where when playing in No Lights Mode the red in-check lights weren't being cleared.
Fixed FEN string load issues when a FEN string was loaded after a completed game or when the FEN included En Passant.
Fixed an issue where if a game was playing on the board and connected to the app, but not played through the app, the game wouldn't save to the internal memory. Now games played on the board will be saved to the internal memory even if connected to the app.
Fixed an issue where sometimes the board would receive a repeat move from the app and cause the board to freeze.
Fixed a bug where undoing a built-in AI move the AI wouldn't make another move, so the game would stall.