Operandi: Number Puzzle Game
Merge numbers, hit the target
Free
The target is 72, exact, no going over. You have six moves, four plus and two divide. Can you see the path?
Operandi is a math puzzle game of logic and mental calculation: tap a number, a sign and another number, and the result adds up to your total. Every level is handcrafted, with an elegant solution waiting to be found. A brain teaser that feels great every single time.
HOW TO PLAY
Tap a number, a sign and another number: the result adds to your total and gets you closer to the target. Operators have limited uses, moves are counted, and in exact target levels going over is not allowed. Ten seconds to learn, weeks to truly master: perfect brain training for math lovers and puzzle fans alike.
260 HANDCRAFTED LEVELS
No random grids: every logic puzzle is designed, tested and tuned one by one. The difficulty ramps up gently, and every chapter brings something new: gold tiles, multipliers, ice to melt, bombs to defuse, eggs to hatch, keys that unlock treasures, a piggy bank to fill up and break open, domino tiles with two faces to choose from, leeches that bite on every move, a phoenix that burns to give you one last chance and a press that crushes its row and column into a single number.
THE FIFTH OPERATOR
Plus, minus, times, divide... and glue. Stick two numbers together and you get a single one: 3 and 7 become 37. Only a few uses per level, but every merge can turn the game around.
LEVELS THAT FIGHT BACK
The deeper you go, the more the board comes alive. The tide raises and lowers every number to its own rhythm, a sneaky thief steals your best tile when his countdown runs out, closing walls squeeze your total, blackouts force you to keep the count in your head and reefs wreck anyone who lands right on them. The rotor decides which sign you may use each turn, day and night swap the rules between them, streaks reward whoever sticks with the same operator, earthquakes shuffle the whole board and storms electrify one tile at a time. Plan around them, or turn them into your finest weapon.
THE DUEL AT THE TOP OF THE TOWER
In the last chapter someone is playing against you. The rival calls his blows two moves ahead: he pins down your best tile, drains your total, steals when you least expect it. You have the numbers, he has the sword.
A JOURNEY THROUGH 14 WORLDS
From the jungle to the desert, from the frozen lands down into the abyss, across floating islands, a clockwork forge and an alchemy lab, from the eclipse to the polar night, all the way to the funfair rides and the rival's tower: the map takes you further one level at a time.
THE BOOK OF SEALS
Nineteen seals to mint, one for every feat: stars collected, chapters cleared, wins within par, daily streaks, levels won with no boosters. Each one pays in coins and raises your rank in the Order, from Addend to Infinity.
THE DAILY CHALLENGE
A new daily puzzle every day, the same grid for everyone. Win it and grow your streak: how many days in a row can you keep it alive?
THREE STARS, IF YOU EARN THEM
Every level has a par, just like golf. Solving it with the perfect line is worth three stars, and most levels hide a feat on top: win without ever using times, finish with a division, land exactly on the target. Pull it off and it pays in coins. Perfectionists, you have been warned.
TRAIN YOUR BRAIN ANYWHERE
Play offline, no internet, no sign up, no account. Five minutes in a queue or a whole evening on the couch, you set the pace. And when you get stuck, hints and boosters have your back.
If you love number games, brain games and math riddles, Operandi will feel like home. Download it free and hit your first target.
Ratings & Reviews
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Share your daily puzzle results, explore the new Mechanics Compendium, plus bug fixes and stability improvements.
The developer, claudio pellegrino, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- claudio pellegrino
- Size
- 44.4 MB
- Category
- Puzzle
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2026 Claudio Pellegrino