Proof Spin

PRIMA DEV

About this game

Proof Spin is a high-tech vault social slot that lets you check its own randomness, played with free virtual coins. Every spin can be recomputed and verified on your device, step by step.

HOW IT WORKS
Choose a total bet of 10, 20, 50, 100 or 200 coins and spin five reels across ten paylines. Match three, four or five symbols from the left: hex, braces, hash, chip, lock, key and vault. The Verified Shield is WILD and pays the most of all.

PROVABLY FAIR
Before you spin, the game shows a SHA-256 commitment of a secret server seed generated on your device. The reel stops come from HMAC-SHA256 of the server seed, your client seed and a spin number. You can edit the client seed yourself. Tap ROTATE & REVEAL to reveal the old server seed and start a new one, then use VERIFY to recompute any recorded spin and see a clear MATCH.

SECURITY STATUS
A security screen runs informational checks on your device, such as root indicators, a debugger and the app's own signing certificate fingerprint. Your saved game is sealed against editing. All checks run locally, results are only shown to you and nothing is sent anywhere. The game is never blocked.

FEATURES

5 reels, 3 rows and 10 paylines

SHA-256 commitments and HMAC-SHA256 reel stops

Editable client seed and seed rotation

Verify screen for your last 30 spins

On-device security status screen

Tamper-sealed save data

1,000 free starting coins with a reset whenever you run out

Works fully offline, no account and no ads

DON'T TRUST, VERIFY
Deep teal panels, mint highlights and a vault that shows its work.

Download Proof Spin now, collect your 1,000 free coins and start spinning!

This game is intended for adults 18+, uses virtual coins only, offers no real money gambling and no prizes of real value. Virtual coins cannot be purchased, withdrawn or exchanged for money. Success in social casino games does not imply future success at real money gambling.