About CalcoTools Games

CalcoTools Games is a small collection of free browser games from the team behind the CalcoTools calculators. We like numbers, logic and short sessions, so that is what you will find here.

How it works

• Every game runs entirely in your browser. There are no accounts and no downloads.
• Best scores and daily puzzle progress are stored in your browser's local storage on this device. We do not send them anywhere.
• Daily puzzles are generated from the UTC date, so everyone gets the same puzzle on the same day.
• Once you have opened a game, it keeps working offline, and you can install the site to your home screen. Streaks and results are on the daily page.
• The games use original mechanics and artwork. Familiar puzzle types such as Sudoku are generic game ideas, not anyone's trademark.

Games

• Mental Math Sprint — Answer as many sums as you can in 60 seconds. Build a streak for bonus points.
• Merge Tiles — Slide numbered tiles and merge matching pairs to build the biggest tile you can.
• Sudoku — Classic 9×9 Sudoku with a fresh daily puzzle and three difficulty levels.
• Field Sweep — Uncover every safe square and flag the hidden mines using the number clues.
• Memory Match — Flip cards two at a time and find every matching pair in as few moves as possible.
• Gem Match — Swap neighbouring gems to line up three or more. Chain cascades for a big score in 30 moves.
• Mahjong Solitaire — Clear the pyramid by matching free tiles in pairs. Every deal is guaranteed solvable.
• Five Letters — Guess the hidden five-letter word in six tries. A new daily word every day, plus practice mode.
• Guess the Unit — Estimate real-world sizes, weights, times and speeds in the unit you are given. Closer is better.
• Comet Trail — Steer a glowing comet, collect stars and grow your trail without hitting the walls or yourself.

Contact

Found a bug or have a game idea? Email calcotools@gmail.com.