How do I replace a symbol in the scheme?

Place the same symbol in another cell of the same row or column to clear the wrongly placed symbol.

The bonus doesn't fill up the row or column, why?

The row or column can't be filled in, because the scheme contains symbols in the wrong cells, making the scheme unsolvable. Replace the wrong symbols to recover.

What are the strange symbols appearing occasionally?

Each game mode has 3 different bonus symbols, for example: spacecraft in cars mode, insects in animals mode, flowers in fruits mode.

These are wildcards allowing to fill a cell, a complete row or a complete column of the scheme.

Does Sudokan support Mac, Apple TV or Vision Pro?

At the moment Sudokan works on iPhone, iPad, Mac and Vision Pro. Support to Apple TV is not foreseen.

Does Sudokan support Windows or Androids devices?

No, at the moment Sudokan is designed only for iPhone and iPad. Minimum iOS version supported is 14.0.