Online fitness challenges with no spreadsheets
Set the dates, the entry fee and the program once. Kahunas opens each week on time, suggests a nutrition plan after every weigh-in, sends the reminders and runs the final vote.





12 Week Fitness Challenge: week 4 is opennowHi Jess, your next challenge week is ready. Your last online fitness challenge ran on spreadsheets.
A Google Sheet of names, bank transfers to match by hand, a PDF program emailed to everyone and a WhatsApp group buzzing at midnight. Then weigh-ins to chase every Monday, before and after photos to sort, and a winner to pick from a pile of DMs.
- Payments to chaseMatching bank transfers to names and chasing the people who said they'd pay later.
- Weigh-ins by handCollecting weights every week and working out who should move to a different plan.
- A finale that eats your weekendSorting photos and answers, then counting votes in a group chat.
Set it up once. Kahunas handles every week after that.
Switch on what they get. Their app shows nothing else.
Group chat, one-to-one messaging, check-ins, supplements and daily habits can be switched on too.
ChallengesJTEveryone starts together, and every week opens on time.
Pick a start date, a length of up to 12 weeks and a time zone. Each week's training opens at your release time, and late joiners slot into the current week.
- Week by week, or everything at the start
- Training waits for their starting form
- Late joiners start in the current week
Members get exactly what you switch on.
Choose what the challenge includes: programs, calorie-range nutrition plans, a weekly weigh-in that suggests their next plan, check-ins and a final form and vote. Members see nothing else in the app.
- A weekly weigh-in that suggests the next plan
- Calorie-range nutrition plans and calculator
- A final form and a finalist vote

Reminders that go out without you.
Eight reminders are on from the start, from each week opening to the winner being published. Change the wording and timing of any of them, or switch one off.
- Push and in-app, in the challenge's time zone
- Personalised with first name and deadline
- Preview a reminder before it goes out
- Week unlocked
- Starting form due
- Starting form missed
- Weekly weigh-in
- Finish form open
- Voting open
- Voting closing
- Winner published
Your 12 Week Fitness Challenge starting form is dueHi Jess, complete your starting form by 2026-11-04 18:00. Spreadsheets and a WhatsApp group, compared with Kahunas.
How it works. Four steps from draft to finale.
- Challenge name12 Week Fitness ChallengeEntryFreeOne payment$395.00 one-time entry1Create the challengeName it, set the start date, length and time zone, and choose free or paid entry.
- Strength BaseChallenge copy
- Lean1,800–1,999 kcal
- Starting intake
2Add the planCopy in a training program, add nutrition plans and choose the forms members fill in.- Registration open12 Week Fitness ChallengeJoin for $395.00Payment confirmedOne payment · no subscription3Open registrationClients join and pay from the challenge page, or you add people by email.
- Finalists
- PSPriya Shah18 votesWinner
- SPSam Patel11 votes
- JTJess Taylor7 votes
4Run the finaleShortlist finalists from the finish forms, open the vote and publish the winner.
Questions coaches ask. Answered.
Works well with
Run your next challenge without the admin
“Try Kahunas for 3 months, not just 14 days. If you're not satisfied for any reason, message us in the chat and I'll personally refund you the same day.”
Mark · Founder of Kahunas