CointiPlay Odds & Provably Fair Results
A concise technical overview of how CointiPlay works and how you can verify every result.
Looking for how to play? See How to Play the CointiPlay Multiplier and CointiPlay Tips & FAQ.
How the game works
Each round has up to 11 levels. Level 1 has a 68.7% win chance; Levels 2–11 each have a 66.7% win chance (≈2 in 3). Multipliers increase as you advance—up to 61.3×.
Cointiply’s house edge is ~3.75% on the first two levels. We pay 0.25% of every bet to referrers, bringing the effective house edge to ~3.5%.
Odds & multipliers by level
A random number from 0–99,999 is generated when you tap a target. Hitting the level’s winning range pays the listed multiplier.
Level | Win chance | Winning range | Multiplier |
---|---|---|---|
1 | 68.7% | 0–68,764 | 1.4× |
2 | 66.7% | 0–66,666 | 2.1× |
3 | 66.7% | 0–66,666 | 3× |
4 | 66.7% | 0–66,666 | 4.4× |
5 | 66.7% | 0–66,666 | 6.5× |
6 | 66.7% | 0–66,666 | 9.4× |
7 | 66.7% | 0–66,666 | 10.38× |
8 | 66.7% | 0–66,666 | 20× |
9 | 66.7% | 0–66,666 | 29.2× |
10 | 66.7% | 0–66,666 | 42.5× |
11 | 66.7% | 0–66,666 | 61.3× |
Example: On Level 1, any number from 0–68,764 wins and pays 1.4×.
Provably fair—what that means
- Two seeds + nonce: Every roll uses a server seed, your client seed, and a nonce (the roll count for that seed pair).
- Pre-commitment: The server seed is created before you choose your client seed, preventing bias.
- Daily reveal: We reveal the server seed daily (UTC) so you can verify all rolls produced with it.
Roll generation (technical)
We compute hmac-sha512(server_seed, client_seed-nonce)
and parse the hex output in 5-char chunks to derive a number:
- Convert the first 5 hex chars to a number in 0–1,048,575. If > 999,999, skip to the next 5 chars and repeat until ≤ 999,999.
- Apply mod 100,000 to get the final roll in 0–99,999.
Where to find & copy seeds in CointiPlay
- Desktop: Open CointiPlay → History, click a round, then expand Details to see Server Seed (revealed), Client Seed, and Nonce. Click the copy icon next to each value.
- Mobile app: Menu → CointiPlay → History → tap a round → Details. Long-press a seed to copy, or tap the copy icon where available.
- Change client seed: In the CointiPlay menu, tap the Settings (gear) icon → Client Seed → update → Save. (This resets the nonce.)
Verifying fairness
- Find the server seed (revealed), your client seed, and the nonce in your CointiPlay history.
- Use any standard HMAC-SHA512 dice verifier to reproduce the roll sequence. Some tools display 0–99.99 (dropping a digit); they still validate the trailing digits, which is sufficient to confirm fairness.
If a verifier truncates one digit, the final four digits still cryptographically match—enough to prove no tampering.
Tips: Record the daily server seed hash and your client seed before a session if you plan to audit later; changing your client seed resets the nonce.