Travelling this week
Check the gym before you get there. If it doesn't have the machine your program calls for, you find out on the plane, not in the locker room.
Wherever you train, train in Tandem
Every rep. Every mile. Every meal.
Record runs and rides with built-in GPS, log strength against the equipment your gym actually has, and keep the meals that fuel both in the same place. When your lifts, miles, and meals live together, your next session can account for all of them. Coaches can share hybrid programs and follow athletes’ workouts, nutrition, and progress.
iPhone and Apple Watch · Android and Wear OS in beta · Import your history, export it whenever you want
Lift Monday. Run Wednesday. Ride Saturday.
Eat for all of it.
Your whole week, in TandemFit.
Strength training built around your gym’s equipment. GPS workouts wherever you go. Progress you can see, and people who keep you showing up.
Gym-aware training
Know your gym before you get there.
See what members and owners have reported at your gym: the machines, the racks, and the dumbbell weights. Use that equipment list to plan a workout at your usual gym, a hotel, or at home.
Your gym in TandemFit
Is it busy right now
Members check in when they train, so you can see whether it’s worth leaving the house at 6pm or waiting an hour.
Workouts that fit your gym
Choose your gym to build a workout around its listed equipment. If a station is taken, find an alternative and keep your workout moving.
Member reports and owner updates help keep the equipment list useful for everyone who trains there.
Help your gym stay up to date
Answer a quick equipment question between sets. Other members can use that information when they plan their next workout.
Rack is taken
Swap to something the gym actually has, tracked against the same exercise so your history stays intact instead of breaking in two.
Your garage counts
Home gyms are gyms. List what you own once and the app plans around your rack and your bumper plates, not a commercial floor.
3D body scans & measurements
See your progress from every angle.
Your effort adds up in ways the scale can miss. See your shape evolve with 3D body scans and estimated measurements, alongside the training and nutrition behind your progress.
Explore the interactive sample to rotate 3D models, highlight measurements, switch between centimeters and inches, and compare check-ins over time. The sample uses illustrative models and measurements.
Progress beyond the scale
A number can only tell part of your story. See changes in your shape from every angle, and give your consistency a new perspective.
Watch your consistency take shape
Bring your check-ins together in one evolving view. Follow the changes over time and see how far you’ve come.
Small changes. A bigger picture.
Chest, waist, hips, and more—connected to your progress. Spot trends across check-ins and celebrate changes that are easy to miss day to day.
Questions
The things people ask before switching.
Can I compare 3D body scans and measurements over time?
TandemFit lets you review 3D body scans and estimated measurements across check-ins. Rotate models, inspect measurement locations, and compare scans through a single animated timeline. The interactive homepage sample demonstrates the comparison with illustrative data; scan measurements are estimates, not medical measurements.
What makes TandemFit different from a normal workout tracker?
TandemFit uses your gym’s listed equipment to help plan workouts and find alternatives. You can also see recorded gym activity where data is available, and train with a partner while keeping workouts, cardio, and nutrition together.
Can I use TandemFit for just lifting or cardio?
Yes. Track lifting, running, cycling, or other supported cardio modes on their own, or combine them. Nutrition tracking is there when you want to track meals alongside your training.
What if my partner has a bad week?
One workout each can win a Tandem week, even if the rest of the week is quiet, as long as the second partner answers within 24 hours. If the response window is missed or one person does not train, the week earns no points and the shared streak resets. You can both renew and try again the following week.
How does the gym equipment data stay accurate?
Two ways. Gym owners can claim their gym and verify the list directly, which stamps it with a date. Everyone else answers one-tap questions between sets, so entries get re-confirmed by people standing in front of the equipment. Anything only one person has reported stays marked unconfirmed until others agree.
Can I bring my training history over?
Yes. Hevy exports import directly, Strava connects over its API so new activities sync on their own, and Runkeeper archives can be uploaded. Individual .GPX, .TCX and .FIT files work if you'd rather move one workout at a time, and you can export everything back out whenever you want.
Which platforms is TandemFit on?
iPhone and Apple Watch are live on the App Store. Android and Wear OS are in beta, and you can request an invite from the homepage.
Do I have to use the social side?
No. Tracking, gym data, guided sessions, health sync and imports all work on their own. Partner features are optional and available whenever you want them.
Guides