Join or Sign In

Sign in to add and modify your software

Sign in with Facebook Sign in with email

By joining, you agree to our Terms of Use and acknowledge the data practices in our Privacy Agreement.

WhereIsCrystal for iOS

Developer's Description

Like any casino, the game WhereIsCrystal is based on random events, but in contrast to casino, one can win the game!If you have ever heard about the Monty Hall problem in the probability theory, you will be especially interested to play the game, as it demonstrates a solution to the problem. If not, guess the game secret on your own, and it will surprise you!The main point of the game is as follows: a crystal is hidden behind one of the three doors, and you have to guess behind which one. The guessing process has two stages. First: you select one out of the three doors. Then one door will be opened, there will be no crystal behind the door, but it will be not the door you have chosen. Second: you still have two closed doors, and you will have to choose one, behind which the crystal is hidden, in your opinion. If you find a crystal, you will get two coins. And every game costs one coin. You can get profit this way. Get 100 coins to go through the game!

Full Specifications

What's new in version 1.0


Release March 30, 2015
Date Added February 13, 2015
Version 1.0

Operating Systems

Operating Systems iOS
Additional Requirements Compatible with . iTunes account required.


Total Downloads 0
Downloads Last Week 0
Report Software

Related Apps

Pokemon GO

Pokemon GO

HQ - Live Trivia Game Show

HQ - Live Trivia Game Show

Batman - The Telltale Series

Batman - The Telltale Series

Air Traffic Controller 4.0 XL Lite - The free ATC airplane simulator Game

Air Traffic Controller 4.0 XL Lite - The free ATC airplane simulator Game

Best VPN Services for 2020

Best for privacy

3 months free with 1-year plan

Best for customer support

$39.99 for the first 12 months

Best for zero logs

$4.87.99/months for a 1-year plan

Best money-back guarantee

$2.99/months for a 3-year plan