Every screen below is the real game on a real iPhone. Meet the machine, solve the first unit in your head, see the one rule each chapter changes, and try the mode you read upside down.
Sumhow is a calculator with most of its keys missing. The screen names a number. The keypad gives you three or four keys and nothing else. Reach the number in the fewest presses.
The target, the par, and the exact keys you will have. That is the whole briefing. Below it, the chapter's units sit in a grid with the stars you have earned on each, so you always know where you left off.
Missing keys are empty sockets in the chassis, not greyed-out buttons. You are holding a broken object and making it work anyway. The machine resolves left to right with no order of operations: on this calculator, 3 + 4 × 2 is 14. That one fact is where most of the difficulty lives.
Every unit has a par: the fewest presses it can possibly be done in, worked out by the game itself, not guessed by a designer. Match it and you get three stars and a card that says so. Beat your own score later if you want. Nothing is ever locked behind failing.
You already know how to work a calculator.That is the entire tutorial. The first unit clicks in about four seconds.
Download on the App StoreThe first four chapters teach the instrument. Every chapter after that changes exactly one thing about how the machine behaves, and the puzzles are built around it.
Press 4, times, equals, equals, equals and watch the number run. In Echo, the equals key is a tool, and the shortest route to a target is rarely the obvious one.
Two multiplications left in this unit. Ever. Spend them early and you are stuck adding your way home. Each chapter has one idea like this: a key that fires twice, a memory key that banks the screen, results that wrap at a thousand, a screen that stays dark until you press equals.
Every chapter, its keys, and how far you have gotten, on one sheet. Jump anywhere you have unlocked. Come back to any unit to chase the third star.
A question is asked. The answer is a word. You type the number that spells it when the screen is upside down.
The readout under the digits shows what your number spells right now, live, so you never have to memorize the alphabet before you start. 710 reads OIL. 5508 reads BOSS. 07734 says hELLO, and yes, the leading zero counts.
If you do the Wordle before coffee, this is the next one.One unit a morning, or a whole chapter on a rainy Sunday.
Download on the App StoreForty-three skins in seven packs. Vaporwave, Leopard, Terrazzo, Blueprint, Starfield, Picnic. Every one reskins the whole chassis, keys and all, and you can try any of them on first.
Skins change the chassis, the keys, the screen glow, and the menu behind them. The puzzle underneath never changes, so pick whatever makes you want to pick the phone up.
Pick a skin and the whole app follows: the unit cards, the chapter rail, the bench. Two menus, same chapter, nothing in common but the numbers.
Same Warm Up chapter, same unit 4, same 1089 to make. Completely different afternoon.
There is a second game underneath this one, and nobody in the app will explain it to you. Certain numbers wake the machine up. Certain mistakes do something other than fail. There is a drawer with nineteen slots, and most of them are empty when you start.
A full calculator with every key live and no target, so the secrets are findable at all.
Found ones show the number and a word. Unfound ones show nothing but that they exist.
That is the rule, in the app and on this page. Find five and something opens.
Every screenshot on this page is Sumhow running on iPhone. Download it, make 6 with a 3, and see if you can stop.
Questions first? team@kismetstudio.io
