Sven's SudokuPad

I want to love this app, but it's broken for me. It started when I tried to create my own puzzle. If I toggle on a specific setting, it will not let me toggle it off anymore. And now, after fidgeting with it, it won't show the 9x9 grid lines. I can't input values as there are no cells to put them in. Maybe the PC version works, but the mobile version doesn't. This is not a result of options simply being turned on or off. The app is literally not functioning as intended.

Screen is blank! Recently, whenever I go to a puzzle the grid and numbers are invisible. This renders it useless. The initial page and settings both work. The fault has persisted through me changing fron6an Xperia 5ii to a Pixel 9 Pro XL. I'd love to get this working again because it's a great app when it does.

useful and beautiful app. I would have preferred to have clearer documentation for each option, and ability to copy other types of Sudoku and preferably add different sets of rules, but at least copy them to the pad, such as killer sudoku, X (requiring diagonals), oddly shaped "jigsaw" blocks. I also encountered a problem, the pad itself disappeared safer a few days, the number pad remains visible and the Sudoku itself appears for a second then disappears, I restarted the game and no improvement