The Devil's Calculator

The Devil's Calculator

A Math Puzzle Game

228 ratings
39 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • January 11, 2019
  • August 25, 2021

Features

The Devil's Calculator video #1 for iPhone
The Devil's Calculator video #2 for iPhone
The Devil's Calculator screenshot #3 for iPhone
The Devil's Calculator screenshot #4 for iPhone
The Devil's Calculator screenshot #5 for iPhone
The Devil's Calculator screenshot #6 for iPhone
iphone
ipad
๐Ÿ–ผ๏ธGet Icon
Iconsโ†˜๏ธŽ

About

This math puzzle game challenges you to decipher obscure operators on a calculator. Solve algebraic puzzles by working backward to understand the functions and purge the calculator of its demons. It's an addictive and educational experience with user-created levels and DLC.

โœ“Obscure operator deciphering
โœ“Algebraic puzzle solving
โœ“User-created levels
โœ“DLC levels by mathematicians
โœ“Graphing mechanics
โœ“Hand-drawn artwork
Show original description

What users say

See all reviews

What's New in The Devil's Calculator

6.0

August 25, 2021

Bug fixes and performance improvements, along with a contextual menu and a procedural engine for building theoretically limitless challenges!

1

In-App Purchases

$2.99

Full Version of Game

Unlock the full version from the free demo

User reviews

Problems

Ads

Completely frustrating operations

Me having to skip levels

Truly an educational game

Unlike most attempts, which can more accurately be described as โ€œeducationalโ€ game or educational โ€œgameโ€. Iโ€™m genuinely having fun while also brushing up on my math and logic. Who knew the number 666 could provide such a wide variety of puzzles.

Update: knocking off a star because some of the late puzzles with the third operator get too tedious with too much trial and error
Show more

Insane

Most creative idea ever
No ads(besides ones that you can close immediately and self promote their other games)
Fun
Best game for no wifi(however if you donโ€™t have wolfram downloaded you canโ€™t use it)

Truly an educational game

Unlike most attempts, which can more accurately be described as โ€œeducationalโ€ game or educational โ€œgameโ€. Iโ€™m genuinely having fun while also brushing up on my math and logic. Who knew the number 666 could provide such a wide variety of puzzles.

Why?

Cant use devils calculator as a calculator instead you have a second basic and bland calculator. interesting concept, actual calculation interface ruins the immersion.

Developer apps

User experience

๐Ÿž

Reported Bugs

9 issues

Some late puzzles with the third operator get too tedious with too much trial and error

Bug

The built-in calculator needs some work and button responsiveness isnโ€™t always the best.

Bug

The graph to wolfram alpha function doesnโ€™t seem to work.

Bug

Thereโ€™s unfortunately an exploit I accidentally discovered that allows you to bypass any level.

Bug

The โ€œrealโ€ calculator malfunctions when you want to use the answer you got previously, like if I input โ€œ330 * 2โ€, getting 660, then pressed โ€œ+6โ€ on the next row, instead of showing 660 + 6 = 666, itโ€™d show 2+6 = 8

Bug

Lost progress again from 38 to 33. iPhone XS Max, iOS 12.4.1.

Bug

My progress seems to be undone somewhat arbitrarily. I was working through the 50s, and when I booted up the game today, my progress had reset to level 35.

Bug

The wolfram graphing feature doesnโ€™t work.

Bug

Thereโ€™s a problem with DLC LEVEL 6 however.

Bug
โœจ

Requested Features

3 requests

Update the app

Feature

Fix DLC Level 6

Feature

More levels

Feature

FAQ

What is The Devil's Calculator?

The Devil's Calculator is a non-profit, open-source math puzzle game. It challenges players to decipher obscure arithmetic operators by using logic and algebraic puzzle-solving techniques to work backward and understand their functions.

What are the key features of this game?

Key features include deciphering mysterious operators, solving algebraic puzzles, advanced graphing mechanics, the ability to create and play user-generated levels, and free DLC levels authored by mathematicians. The game also boasts hand-drawn artwork and a charming story.

Is The Devil's Calculator free to play?

Yes, the first 20+ levels are 100% free to play. The app also offers additional DLC levels, some of which are free, and allows for in-app purchases for further content or features.

What kind of math is involved in this game?

The game primarily involves logic and algebraic puzzle solving. Players need to decipher the functions of obscure operators, which requires understanding how they manipulate numbers, similar to solving equations or interpolating unknown functions.

Who is this game designed for?

This game is designed for a wide audience, including numberphiles and math novices. Anyone who enjoys logic puzzles, algebraic challenges, and educational games will find this app engaging and gratifying.