DietBet turns a diet into a pool. You and a few hundred strangers each put in about $35, you all try to lose 4 percent of your body weight in four weeks, and whoever manages it shares the pot. It is friendlier than it sounds and safer than most money-on-fitness apps. It is also widely misunderstood, because the headline of doubling your money describes the unusual game, not the usual one. We went through the rules, the fees and a real game's published numbers to show what a winner typically takes home.
Disclosure: Fitcoin is our own fitness-rewards app, so we compete for the same phone screen. Fitcoin has no stakes, entry fees or betting of any kind. We have no relationship with the companies below and take no referral payment. Putting money on a health goal can go wrong for people with a history of disordered eating or problem gambling; nothing here is medical or financial advice.
The short version
DietBet is a legitimate group weight-loss game from WayBetter, the company behind StepBet. Everyone pays into a pot, everyone who hits the target splits it, and DietBet keeps 10 to 25 percent. Because most players in the short games win, the pot is split many ways, and the typical winner takes home their own money plus a few dollars. A guarantee means winners never get back less than they bet. Treat it as cheap accountability, not income.
The three games
| Game | Target | Length | Typical stake | What winners report |
|---|---|---|---|---|
| Kickstarter | Lose 4% of body weight | 4 weeks | $10 to $100; $35 is common | 1.5 to 2 times the bet, by DietBet's own average |
| Transformer | Lose 10% of body weight | 6 months, 6 rounds | About $35 a month, or $175 up front | About $325 for winning all six rounds |
| Maintainer | Stay at your goal weight | 12 months | Varies | Smaller, steadier pots |
You weigh in with two photos, one of you on the scale and one of the display with a code word DietBet sends you, at the start and at the end of each round. There is a ceiling as well as a floor: lose more than about 12 percent in a Kickstarter and you can be disqualified, and players with a BMI under 18.5 cannot join. Both rules exist to stop the game rewarding dangerous dieting, and both catch out people who leave it all to the last fortnight.
One real game, worked through
A reviewer at Side Hustle Nation published the numbers from a Kickstarter they played: 384 players, a $13,440 pot, and 264 winners. That is a $35 bet, and a 69 percent win rate. DietBet's fee on a bet of that size is at the top of its range, so take 25 percent.
Three dollars and eighteen cents, for losing 4 percent of your body weight in a month. DietBet's average of 1.5 to 2 times the bet comes from games where far more people fail, and you cannot know in advance which kind you have joined. If you want better odds of a meaningful payout, the uncomfortable truth is that you want a game full of people who will not make it.
The No-Lose Guarantee
If so many people win that the fee would leave winners with less than they staked, DietBet reduces or waives its fee so that every winner at least gets their bet back. It is a real protection and it is the reason DietBet is the gentlest of the stake apps. Two limits: it applies to winners only, and it does not cover the optional annual membership if you bought one.
DietBet or HealthyWage
| DietBet | HealthyWage | |
|---|---|---|
| Format | Group pot, fixed target | Individual wager, your own target |
| Shortest commitment | 4 weeks | 6 months |
| Money at risk | Usually $35 to $175 | Usually hundreds |
| Prize known in advance | No, depends on who wins | Yes, quoted before you start |
| Realistic upside | A few dollars to a few hundred | Hundreds to thousands |
| Floor for winners | At least your bet back | The quoted prize |
DietBet is the one to try first: a month, $35, and a community that is by most accounts kind. If it works for you and you have a lot further to go, our HealthyWage review covers the bigger bet. For the same idea applied to walking, see our StepBet review and StepBet vs WayBetter, which explains how the WayBetter family of games fits together.
Who it suits
People who want a deadline, a group and a small financial nudge, and who have at least 4 percent to lose safely. It does not suit anyone with a history of disordered eating, and it is pointless as a way to make money. If money for movement is what you are after, the best apps that pay you to exercise pay less than a winning bet and never take anything from you.
Method: Checked November 10, 2026. Game formats, the 4 percent and 10 percent targets, stake sizes, the 10 to 25 percent fee range, the No-Lose Guarantee and payout methods are from DietBet's published rules as described in reviews by Side Hustle Nation, MoneyPantry, My Money Blog, Frugal For Less, SideHusl and HighYa. The 384-player game is Side Hustle Nation's own; the fee rate applied to it and the resulting figures are our assumption and arithmetic. DietBet's 1.5 to 2 times average is the company's own claim. We have not played a game for this review.
Frequently asked questions
Is DietBet legit?
Yes. DietBet is run by WayBetter, the company behind StepBet, and pays winners by PayPal with no payout fee or by cheque for $5. Winners are guaranteed to get back at least what they bet.
How much money can you win on DietBet?
It depends on how many players fail. DietBet says Kickstarter winners average 1.5 to 2 times their bet, but in a game where most players win the profit can be a few dollars. In one published 384-player game, a $35 bet returned about $38.
What is the difference between Kickstarter and Transformer?
A Kickstarter asks you to lose 4 percent of your body weight in four weeks for a single pot. A Transformer asks for 10 percent over six months in six monthly rounds, each with its own prize.
What fee does DietBet take?
Between 10 and 25 percent of the pot, with the higher rate on smaller bets. Under the No-Lose Guarantee the fee is reduced if it would leave winners with less than they staked.
Can you be disqualified for losing too much weight on DietBet?
Yes. There is a cap of around 12 percent of starting weight in a Kickstarter, and players with a BMI under 18.5 cannot take part.
Method: Checked November 10, 2026 against manufacturer product pages, published help documentation and independent reviews. Prices are US list at publication unless noted. Fitcoin has no commercial relationship with the hardware brands named here. Wellness estimates only, not medical advice.
Related reading: HealthyWage review, StepBet review, StepBet vs WayBetter, Apps like StepBet, Get paid to go to the gym
About the author: Harris Khan is the co-founder and CTO of Fitcoin, a UK fitness-rewards and health-insights app that reads Apple Health and Health Connect.