Crack the Code

Name: Crack the Code
Author: Oonak

Android app by Oonak. Puzzle · Oonak

Store rating: Unknown
Store rating count: Unknown
Download price: Free to download
In-app purchases: Listed by the store
Version: 1.0.14
Listing last refreshed: 2026-09-16

Store description excerpt

Crack the Code is a two-player logic-deduction race. You each hide a secret code made of digits. Then you both start guessing — at the same time, with no turns to wait for. Every guess comes back marked, and the marks are all you get. The first player to work out the other's code wins. SET A CODE. CRACK THEIRS FIRST. ▸ QUICK DUEL Get matched with a random opponent at the same difficulty, usually within seconds. If nobody else is queueing after ten seconds you get a server stand-in instead of a spinner — same rules, never sees your code, kept out of every leaderboard. Wins move your rating, and the leaderboard tracks the fewest guesses anyone has ever needed. ▸ PRIVATE ROOM Create a six-character code and read it out to a friend. They type it in and you're duelling. No accounts, no friend requests, no waiting. ▸ DAILY CHALLENGE One code a day per difficulty, the same one for every player on the planet, generated at midnight UTC. Twelve guesses. Ranked by fewest guesses first, then fastest time. Your attempt saves as you go, so you can put it down and come back. ▸ SOLO VS BOT Four skill levels, from a bot that forgets what it was told to a Knuth minimax solver that never wastes a guess. You take turns — one guess each — so the scores are directly comparable. Works with no internet at all: on a plane, on the underground, anywhere. TWO WAYS TO BE ANSWERED • DETAILED — every digit of your guess is marked. Green means right digit, right place. Amber means that digit is in the code but somewhere else. Grey means it isn't in the code at all. • CLASSIC — you are told only how many digits are exactly right and how many are misplaced. Never which. This is traditional Mastermind scoring, and working out which digit is which is the whole puzzle. FOUR DIFFICULTY PRESETS • Easy — 3 digits from 0-5, no repeats, Detailed. 120 possible codes. • Normal — 4 digits from 0-9, no repeats, Detailed. 5,040 possible codes. • Hard — 4 digits from 0-9, repeats allowed, Classic. 10,000 possible codes. • Extreme — 5 digits from 0-9, repeats allowed, Classic. 100,000 possible codes. A bigger haystack is not automatically harder. Extreme has ten times more codes than Hard but one extra digit in every answer, so a good solver needs about the same number of guesses. What makes those two hard is losing the per-digit marks. A DEDUCTION HELPER, NOT A CHEAT The duel screen counts how many codes are still consistent with everything you have been told, and gives you a digit grid to mark digits in or out as you work them out. It reveals nothing your own answers did not already imply — any player with a pencil could reach the same number. Switch it off in Settings if you would rather keep it all in your head. NOBODY CAN CHEAT On paper, the obvious cheat is to change your code once the other player gets close. That is impossible here. Your code is sent once and written down by our server, and no message exists that can change it afterwards. Your opponent's phone is only ever tol

Review coverage

AppRill has captured 0 reviews for this app. This is a collected sample, separate from the store rating count. Latest review capture: Not captured yet.

Recent captured chart positions

No chart positions have been captured for this app yet.

Chart position, rating count and review coverage do not establish downloads, revenue or profit. Understand the differences.