If you came across the paid version, it's probably a scam. The app was created to help people earn money, so it's free. No one can say exactly how the outcome of the event will fall, so the application may or may not be a guess.
Bet on low multipliers\n\n You'll win far more bets on Aviator if you only bet on the lower multipliers. This is because there is a far higher chance of the aeroplane making it past a multiplier of 1.50x compared to 15x.