MustDuo

MustDuo

Workout tracker with AI coach

13 ratings
10 reviews
Free

Details

Released
May 19, 2026
Updated
September 17, 2026

Features

MustDuo screenshot #1 for iPhone
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MustDuo screenshot #6 for iPhone
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About

This fitness app helps you build consistency and achieve your goals with real-time tracking and personalized plans. An AI coach provides guidance, motivation, and on-the-fly adjustments to keep you on track with your fitness journey.

✓Smart workout tracking
✓Personalized workout plans
✓AI fitness coach
✓Habit building features
✓Gamified fitness experience
✓Progress analytics
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What's New in MustDuo

1.7

September 17, 2026

A new first screen, a quick tour, Dark Mode, one weight unit setting, and lots of fixes. New - New first screen: start a 30-minute workout or plan your week before signing up. - A quick tour on Home shows you around. Replay it any time from Settings. - Dark Mode: Light, Dark or Auto in Settings. - Set pounds or kilograms once for workouts, charts and receipts. - Runs, rides and classes from Apple Health now show on your week and in History. - Ended today's workout by mistake? Reopen it and tap Start Over. - Leaving a workout that won't count now offers Discard Workout. - Add or remove 15 seconds of rest. - Ask Naya to go lighter mid-workout: she'll lower the weight on your remaining sets and may cut a set or two. - Naya chat adds starter questions and How Naya works (also in Settings), explaining where your messages and training go. - Add your body weight in Edit Profile (optional) so Naya can judge how heavy a lift is for you. - Circuits run station to station in rounds; intervals show effort zones and coaching cues. - Search exercises by muscle or equipment. Fixes - Timed sets and the lock screen rest timer keep time with your phone locked. - Resuming keeps your Duration accurate, and Pause for 2 Hours clears the lock screen card. - Workouts save to Apple Health even with Active Energy sharing off. - No reminders or streak nudges mid-workout or for workouts you've already done. - The "Your week" widget and workout receipts stay accurate, even offline. - Better layouts at larger text sizes, and VoiceOver announces rest ends and Naya replies.

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User reviews

Best app

Great app to use for work out
Great flexibility for choosing and making new workouts routines
It also pushes and guides you through the exercises and Naya also helps you modify and change exercises for your preferences

Great app

I love this app, it’s so intuitive and easy to use

Super easy to use.

Comes with great library and I love that it logs my sets.

Great app

Love how easy to use. I look forward to my workout day to use it!

Naya is cute

I like that Naya pushesh you and keeps you accountable. I also like the demo videos that show you how to perform every exercise

FAQ

What is MustDuo?

MustDuo is a fitness app designed to help users build consistency, hit their goals, and stay accountable. It offers real-time tracking, personalized plans, and AI-powered coaching.

Does MustDuo have ads?

No, MustDuo is ad-free, allowing for an uninterrupted fitness experience.

What devices does MustDuo support?

MustDuo is currently supported on iPhone devices.

What is the age rating for MustDuo?

MustDuo has an age rating of 12+, making it suitable for teenagers and older.

How often is MustDuo updated?

The latest version of MustDuo is 1.2, and it was last updated on June 27, 2026. Updates ensure the app remains reliable and features are improved.

What are the key features of MustDuo?

Key features include smart workout tracking, personalized workout plans, an AI fitness coach named Naya, habit-building tools, a gamified experience, and progress analytics.

What is the user sentiment for MustDuo?

Based on the available data, MustDuo has a perfect 5.0-star rating from 2 reviews, indicating very positive user sentiment.

Is MustDuo free to use?

Yes, MustDuo is available for free, with no cost to download or use its core features.