It logs the session without you typing anything, on iPhone and on the web.
Simple doesn't mean fewer exercises. It means fewer decisions
Most fitness apps compete on size: thousands of workouts, custom builders, dozens of settings. That's great if you love planning. If you've downloaded a few apps and stopped using all of them by week two, size is the problem. Every choice is a chance to put it off until tomorrow.
The research backs the "decide in advance" approach:
- People who fix the when, where and what of a goal ahead of time follow through much more often than people who only set the goal. A meta-analysis of 94 independent tests found a medium-to-large effect (Gollwitzer and Sheeran, 2006).
- New daily habits took a median of 66 days to become automatic, with a range of 18 to 254, and simpler behaviors got there faster (Lally et al., 2010). The easier a workout is to start, the sooner it stops needing willpower.
- Early dropout is the default. 63% of new fitness-center members in one study of 5,240 people stopped within three months (Sperandei et al., 2016).
What a simple workout app should do (and skip)
| It should | It should skip |
|---|---|
| Show today's workout the moment you open it | Making you build a routine first |
| Set reps, sets and rest for you | Asking you to pick from a huge library |
| Log the session automatically | Manual logging or spreadsheets |
| Show your last session so you know what to beat | Charts you'll never read |
| Let you swap one exercise if you can't do it | Rebuilding the whole plan |
| Work with whatever equipment you have | Assuming you're in a gym |
If an app fails the first row, it isn't simple, however clean it looks.
How DO IT works
- Open the app. Today's workout is ready, filtered to your equipment profile (gym, home or travel).
- Follow along. Each exercise has an HD demo video, and the rest timer starts on its own, longer for big compound lifts and shorter for accessories.
- Can't do a move? Swap it in one tap for another exercise that hits the same muscle group.
- Finish. You get a short summary: volume, personal records and muscles worked. Your history and streak update automatically, with rest-day protection so planned rest doesn't break the streak.
- Rate it. Tell the app how hard it felt and future workouts adjust. Next time it shows your best reps and last session so you know what to beat.
No subscription, no trial and no premium tier. Sign in with your phone number; no password.
Who it's for, and who it isn't
DO IT is for people who know they should work out and keep saying "tomorrow." If you want 200 customization options or a fully hand-built program, a bigger app will suit you better. If you want to stop planning and start moving, this is the one job DO IT does.
Related
- New to training? Workout app for beginners covers what a first month should look like.
- Checking it's really free? Free workout app with no subscription.
- Racing Hyrox? The free Hyrox beginner plan and free Hyrox split calculator.
Frequently asked questions
What's the simplest workout app?
One that picks today's workout, sets your reps and rest, and logs it for you. DO IT works this way: open the app, follow the session, done. It's free on iPhone and web.
Is there a workout app that just tells you what to do?
Yes. DO IT shows a pre-built workout each day with demo videos for every exercise, so there's nothing to plan or choose.
Do I have to log my sets in DO IT?
No manual logging. Your history, streak and best reps are recorded as you complete the workout.
What if I don't like an exercise or can't do it?
Swap it in one tap for another exercise that works the same muscle group.
Can I use DO IT without equipment?
Yes. Choose the home profile for bodyweight workouts, or switch to gym or travel when you have different equipment.
Is DO IT free?
Yes. No subscription, no trial, no premium tier. DO IT is built by Supliful, which sells an optional creatine drink in a separate shop; the app doesn't require it.
Sources
- Gollwitzer PM, Sheeran P. Implementation intentions and goal achievement: a meta-analysis of effects and processes. Adv Exp Soc Psychol. 2006;38:69-119. https://doi.org/10.1016/S0065-2601(06)38002-1
- Lally P, et al. How are habits formed: modelling habit formation in the real world. Eur J Soc Psychol. 2010;40(6):998-1009. https://doi.org/10.1002/ejsp.674
- Sperandei S, Vieira MC, Reis AC. Adherence to physical activity in an unsupervised setting: explanatory variables for high attrition rates among fitness center members. J Sci Med Sport. 2016;19(11):916-920. https://doi.org/10.1016/j.jsams.2015.12.522
Disclosure: DO IT is a free workout app built by Supliful. We also sell a creatine and electrolyte powder in the DO IT shop. You don't need it to use the app or follow anything on this page.