Log the set. MUTARA tells you the next weight.
Log weight, reps and RIR in seconds. The app runs double progression for you, watches your weekly volume per muscle and tells you when it's time to deload.

Try it with one set
Bench press, 80 kg. Your program calls for 6–10 reps, leaving 1–2 in reserve. Tell us how it went:
A simplified version of the app's logic. MUTARA also uses your history, the exercise type and the plates you have.How it works
Three steps, the same every training day.

Log every set
Weight, reps and RIR with a keypad built for the gym. Every workout goes into your history, PRs included.

Keep an eye on volume
The app adds up your sets for each muscle and tells you whether you're short, in the optimal range or overdoing it.

Progress without the maths
When you hit the top of your rep range at the planned effort, MUTARA adds weight. If you stall, it tells you.
Everything else you need
Ready-made routines
Upper/lower, push/pull/legs, full body and more. Or build your own, import it from text or CSV and share it.
Mesocycles with deloads
Six-week blocks that ramp up effort step by step and end with a deload week.
History that never gets lost
Calendar, PRs and stats for every exercise, synced to your iCloud even if you change routine or iPhone.
Rankings, streaks and badges
Compete with your gym or friends, keep your weekly streak and unlock badges for training consistently.
Widget and Live Activity
Your streak and calendar on the Home Screen, and your rest timer always in view.
In your language
English, Spanish, French and Portuguese.
For coaches: your clients, set by set
With a Trainer plan your athletes train with MUTARA and you see what they do as they log it.
- Invite them with a code, no setup
- Assign routines and adjust them remotely
- Send suggestions they see mid-session
- Coach clients without the app too, with manual logging
Plans for 10, 50 or 100 clients, monthly or yearly. Your own training is included.

Learn to train with data
Double Progression Method: How It Works, Example and When to Add Weight
Double progression means adding reps within a range and, once you hit the top, adding weight and dropping back down. How to use it, how much weight to add, what to do when you stall, and the main variations.
MEV, MAV and MRV Explained: Weekly Volume Table by Muscle
What MV, MEV, MAV and MRV (maximum recoverable volume) mean, where they come from, what research says about training volume, and a weekly sets table for each muscle.
RIR vs RPE: Differences, Conversion Chart and When to Use Each
What RPE means in lifting, where it comes from, how it differs from RIR, and the full RPE chart with half points. Plus how RPE load charts work and where they fall short.
How Many Sets per Muscle Group per Week to Build Muscle
How many weekly sets per muscle group you need for hypertrophy: what the meta-analyses show, how to count indirect sets, and how to add volume without overdoing it.
FAQ
How much does MUTARA cost?
It's free to download and you can try the app without paying. To train without limits you need MUTARA Pro, monthly or yearly, with 7 days free if it's your first time. Coaches have separate Trainer plans based on the number of clients.
Is it on Android?
Not yet: iPhone only for now.
What is RIR and why does the app ask for it?
RIR is the number of reps you had left in reserve when you ended a set. Together with weight and reps, it's what lets MUTARA know whether to add, keep or drop the load.
What happens to my data?
Your workouts are stored on your iPhone and synced to your private iCloud. Your history stays even if you change routine or phone.
How is it different from other gym apps?
Most apps just record what you did. MUTARA also analyses it: it suggests the weight for your next session, tells you whether your weekly volume is enough and when it's time to deload.
Your next set already has a weight.
Download it free and log your first workout today.
Download on theApp Store