Bluecosmium / Ex & Oh / Support
Ex & Oh Support
Tic-tac-toe, seven ways, against a machine that has solved every game.
iOS 18 or later · Updated 24 September 2026
hello@bluecosmium.com — a real reply, usually within two days. Telling us your device model, iOS version and the stage number saves a round trip.
Playing
The worlds
The adventure has seven worlds and nineteen stages, from plain tic-tac-toe to Ultimate — nine boards inside one. Each world changes one rule:
- Classic — three in a row.
- Fifteen — pick numbers 1 to 9; three that add to 15 win.
- Drop — four columns with gravity; marks fall to the lowest empty cell.
- Wild — place X or O on your turn; any line you complete wins for you.
- Blind — marks show for a moment, then go dark; play from memory.
- Notakto — three boards, both players use X; whoever completes the last line loses.
- Ultimate — your move decides which small board your opponent plays next.
“I can't beat this stage”
Some stages ask you to win, others only ask you not to lose. The goal is shown before every stage, and every goal is achievable — each one was checked against the solved game. If you are stuck, open the move-by-move review after a game: it shows exactly where the result changed. Hints are available during play.
Difficulty levels
Opponents range from Novice (level 1), who makes mistakes, to EDSAC (level 10), which plays perfectly where the game is solved. In Free play you can pick any level, or play two players on one phone.
Today's puzzle
A new puzzle appears every day and is free forever, with or without the full game. Solving puzzles on consecutive days builds a streak.
Purchases
What is free and what is not
The first world (five stages), Classic in Free play, and the daily puzzle are free with no time limit and no ads. A single purchase unlocks the full game: worlds 2 to 7, every rule set in Free play, review and hints everywhere, and observer mode.
Restoring a purchase
Open Settings inside the game (or the purchase screen) and choose Restore purchases. Use the same Apple Account that made the original purchase. This works on a new iPhone, after deleting and reinstalling, and after a device transfer.
One purchase, no subscription
Unlocking is a single non-consumable purchase. There is no subscription, nothing recurring, no ads, and nothing to buy later. Family Sharing is supported.
Does it work without internet?
Yes. Every opponent runs on your iPhone, so the game plays anywhere. Restoring a purchase on a new device needs a connection once, because that request goes to Apple.
Refunds
Refunds are handled by Apple, not by us — visit reportaproblem.apple.com. If something is broken, write to us first; we would rather fix it.
Progress
Stars and cleared stages are saved on your device. Reset progress in Settings clears them; it does not remove your purchase. Deleting the game also deletes your progress.
Something looks wrong
Write to us with the stage number, your device model, and your iOS version. A screenshot is the fastest way for us to see what you see.
Privacy
The game collects nothing about you — no account, no analytics, no ads, no third-party code. The full statement is on the privacy page.