Aviator's provably fair system fixes each round's crash point before the plane takes off, using a server seed from the operator combined with client seeds from players and run through a SHA-512 hash. A scrambled version of the server seed is shown before the round, so the result cannot be swapped later without the check failing. You can open any finished round and see the seeds, the hash and the result, but nobody can use this to see the next crash point.
For adults 18+ only. Every Aviator round carries a house edge and real risk of loss. A fairness check confirms a round was not altered; it cannot turn the odds in your favour.
Below: the cryptography in plain English, how to check a round and what that proves. For game basics, see our complete Aviator guide for Indian players.
What does "provably fair" mean in Aviator?
Provably fair means you can check, after a round, that its result came from data fixed in advance and was not edited once bets were placed. Spribe, the company that makes Aviator, says its round results are "not generated on our servers" alone but "with help of round players", and that anyone can check and confirm game fairness.
Spribe's game rules for Aviator add that the fly-away coefficient is generated before each round starts, and that its honesty can be checked from the History tab.
Who decides where the plane flies away?
Nobody chooses it by hand. The crash point comes from a calculation with several inputs:
- Server seed. Spribe's provably fair page says the operator generates a server seed of 16 random symbols.
- Client seeds. Each player's game generates a client seed on the player's side. Aviator's in-game Provably Fair explanation, as published by many operators, says the seeds of the first three players to bet in a round are used.
- The combination. When the round starts, the server seed and the client seeds are joined and hashed with SHA-512. The round result is worked out from that hash.
Part of the input comes from players in that round, so the full input is not known until the round begins.
What are the server seed and the client seed?
A seed is just a random string of characters. The server seed comes from the game operator. The client seed comes from your device.
Spribe says you can view and change your own client seed in the game menu under Provably Fair Settings. Changing it does not improve your chances.
What are SHA-256 and SHA-512, and why are they used?
SHA-256 and SHA-512 are one-way hash functions. They turn any text into a fixed-length string of letters and numbers. The same input always gives the same output, but you cannot work backwards from the output to the input, and changing a single character changes the whole result.
Aviator uses them in two places:
| Step | What you see | Hash used | Purpose |
|---|---|---|---|
| Before the round | "Next server seed SHA256" in Provably Fair Settings | SHA-256 | Locks in the server seed without revealing it |
| After the round | Server seed, player seeds and the combined hash | SHA-512 | Shows the input that produced the crash point |
We tested Spribe's own example on its provably fair page. It combines server seed "AB" and player seed "CD" into "ABCD". Hashing "ABCD" with SHA-512 gives exactly the string shown on Spribe's page, starting 49EC55BD.
How can you check an Aviator round yourself?
Open the round's fairness window and compare the values. On Betroxy:
- Launch Aviator on Betroxy; it sits in our crash games section.
- Before a round, open the game menu, then Provably Fair Settings, and note the Next server seed SHA256 value.
- Play or watch the round.
- Afterwards, find the round in your bet history or the round results and tap the provably fair icon next to its result. Spribe's rules mention the icon in the History, My Bets and Top tabs.
- The window shows the server seed, player seeds, combined hash and round result.
- Check that the SHA-256 of the revealed server seed matches the value you noted, and that the SHA-512 of the combined seeds matches the hash shown.
Any standard SHA-256 or SHA-512 tool can do step 6, such as the sha256sum and sha512sum commands on a computer. Spribe notes that each game turns the hash into a result with "slightly different mathematics", and its public page does not spell out Aviator's exact conversion formula. So the hash match is the main proof.
You can rehearse these checks in free play first: our Aviator demo guide covers it.
Is Aviator rigged?
The provably fair check is designed to show that a finished round was not changed after bets were placed. If an operator swapped the server seed mid-round, its SHA-256 would no longer match the value shown before the round, and anyone who checked would spot it.
That is different from saying you are likely to win. Aviator has a built-in house edge: Spribe publishes a 97% RTP. Over a very large number of rounds, that means about ₹97 back for every ₹100 staked. Our Aviator RTP and gameplay guide explains what RTP means in practice.
What does provably fair not prove?
It proves the round matched its seeds. It does not promise profit or predict anything.
- It does not show how the seeds were picked. It checks that the published inputs and the result agree.
- It does not test the 97% RTP. That is a long-run average across huge numbers of rounds, not something one round can show.
- It does not cover technical faults. Spribe's rules say that if gaming hardware or software malfunctions, affected bets and payouts are void and the bets are refunded.
Can a predictor or "provably fair calculator" app see the next crash point?
No. Before a round, only the SHA-256 hash of the next server seed is public, and a hash cannot be reversed into the seed. The client seeds of the first players to bet are not known until they bet. Without both, no app can calculate the crash point.
A genuine verifier only works on rounds that have already finished. Tools sold as "hash calculators", signal channels or modded APKs that promise the next multiplier are lying, and plenty are built to grab deposits or logins. Never share your Betroxy password or OTP. Our Aviator app download guide explains how to spot fake files.
Does provably fair mean past rounds tell you anything?
No. Every round starts from fresh seeds, so earlier crash points carry no information about later ones. A streak of early fly-aways never makes a big multiplier "due". Our Aviator strategy tips focus on what you can control: stake size, cash-out targets and a session budget in ₹.
For how SmartSoft words fairness in its rival crash title, read Aviator vs JetX.
Payments, bonus and who runs Betroxy
Betroxy accepts deposits from ₹500 through UPI, IMPS or crypto and charges no fees; our UPI deposit guide walks through it. The welcome bonus for new players is 100% up to ₹1,000. Wagering applies, and the bonus rules set out the terms. Withdrawals start at ₹300 with no fees; see the withdrawal guide. Betroxy is run by Interactive Digits Ltd under an Anjouan licence. Game results come from the provider, not from Betroxy, as our Fairness page explains.
For rules, RTP, auto cash-out and the Android app, head back to our Aviator page.
FAQ
Is Aviator provably fair?
Yes. Spribe says Aviator results come from its provably fair system, which combines a server seed with client seeds and a SHA-512 hash. You can check any finished round from the game's history.
Where are the provably fair settings in Aviator?
Open the game menu and choose Provably Fair Settings. There you can see the SHA-256 of the next server seed and view or change your client seed.
Can I predict the next Aviator round from the hash?
No. The pre-round hash cannot be reversed, and the client seeds are not known until players bet. Apps that claim otherwise are scams.
Does changing my client seed help me win?
No. It changes one input to the calculation, but you still cannot know the result in advance. The 97% RTP stays the same.
Does provably fair mean Aviator has no house edge?
No. Provably fair shows that a round was not altered. Spribe publishes a 97% RTP, so over time the game keeps about 3% of all stakes.
Treat Aviator as paid entertainment, not income. Fix your spend before each session, walk away after a loss rather than chasing it, and pause often. Need help? Our responsible gambling page has limits and support, and self-exclusion lets you take a break. 18+ only.