Tic Tac Toe: AI and friends

Tic tac toe (Xs and Os or Noughts and crosses) is a game where players try to get 3 marks (X or O) in a row or diagonal on a 3x3 grid.
Its a turn based game that can be played against other player or an artificial intelligence.
This is a great game to pass free time whenever and wherever.
Play it with your siblings, friends or whenever you have some free time.
For greater challenge change grid size to your liking and increase number of marks needed to win.
Features⭐ single player or local 1v1 mode⭐ classic simple design⭐ choose which mark starts the game⭐ different grid sizes up to 15x15⭐ independent vertical and horizontal grid size⭐ light and dark modeDescriptionOn the main screen choose two game modes.
First is solo play where you play against a computer (Artificial intelligence or solving algorithm).
The system is setup so it is not impossible to win.
Limitation with this game mode is grid size.
For larger grid sizes the solving algorithm is quite slow so limitation is set to 25 spaces (5x5, 6x4, 3x8 and smaller is accepted).
The other game mode is 1v1 which is local multiplayer.
In this game mode play against local opponents like your friends and family.
In this game mode the largest grid size is 15x15.
In the options menu choose what mark is for first player and which mark starts the game.
There are 3 dropdown menus for horizontal, vertical grid size and number of marks in a line to win.
For larger than classic grid size 4 or more marks to win is recommended.
And of course there is choice for dark mode.After a game is finished the result is displayed and a choice is presented.
Play again, go to main menu or quit the app.
The back button or gesture always works.