Solo01/06
Standard, easy mode, Daily Cipher
Play alone against the timer. Easy mode to start (5 digits), standard mode (7 digits). The Daily Cipher offers the same grid to everyone, every day at midnight.
Game · LogicAdult
Masternum
A 7-digit code. 6 tries. 2 minutes.
Masternum reimagines Mastermind with digits. A random 7-digit secret code, 6 tries to crack it, 2 minutes on the clock. Solo, or against others — locally with friends, or remote. No ads, no hidden subscription, no data collection.
Features
Everything in the app, written out.
Six key features. No bloat, no feature hidden behind a subscription.
Multiplayer02/06
Race (2–8 players) or Duel
Race mode: who cracks the code first? Duel mode: each player sets a code and tries to crack the other's. Local or remote via Game Center.
Daily Cipher03/06
Same grid for everyone, every day
Every day at midnight, a new code identical for all players worldwide. Compare your score without sharing your data.
Accessibility04/06
3 colour-blind presets, shape indicators
Deuteranopia, protanopia, tritanopia: three verified palettes. Cells also use distinct shapes so the game never relies on colour alone.
Privacy05/06
Everything stays local
No proprietary backend, no analytics, no tracking pixel. Your games stay on your device. If you enable Game Center, Apple manages your account — we only see username and score.
Business model06/06
No ads. No hidden subscription.
Masternum is free with a complete solo mode. Multiplayer is unlocked by a one-time purchase. No advertising, ever.
Screenshots
The app in pictures.
Four representative screens. No marketing fluff — the app as it is.
Accessibility
Playable with a screen reader.
Masternum is designed to remain playable with a screen reader. All interactive elements have a VoiceOver label, each cell carries its readable state, the number pad is navigable via external keyboard. Colours are validated ≥ 4.5:1 on the dark background, and a high-contrast mode forces states to full ink.
VoiceOver
Dynamic Type
Reduce Motion
High Contrast
Privacy
Your data stays yours.
Masternum collects no personal data. No identifier, no analytics, no tracker. Your games stay on your device. If you enable Game Center, Apple manages your account; we only see username and score.
NONo backend, no analytics
NONo pixel, no third-party tracker
OKGame Center (optional, managed by Apple)
OKStoreKit for billing
FAQ
Frequently asked questions.
Real questions, real answers.
01Does the game work without internet?
Yes. Solo mode works entirely offline. The Daily Cipher requires a connection to verify today's date. Remote multiplayer uses Game Center.
02What is the Daily Cipher?
The Daily Cipher is a shared grid for all players worldwide, renewed every day at midnight (local time). Everyone tries to crack the same code — comparable to Wordle, but with digits and 7 positions.
03How does multiplayer work?
Two modes: Race (first to crack the code wins) and Duel (each player sets a code and tries to crack the opponent's). Local mode by passing the device. Remote mode goes through Game Center, no proprietary server.
04Are there in-app purchases?
One optional purchase unlocks multiplayer mode. The full solo mode (standard + easy + Daily Cipher) is free for life. No subscription, no consumables, no advertising.
05Does it work on iPad?
Yes, Masternum is universal iPhone + iPad. The interface adapts to screen size.
Pricing
Details coming soon.
Solo free. Multiplayer: one-time purchase.
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