DuoSwim: Swim Workout App 4+

Swimming & Triathlon Training


Designed for iPhone

    • 4.9 • 63 Ratings
    • Free
    • Offers In-App Purchases


Accomplish your swimming goals quickly with training plans, hundreds of workouts and swim metrics all tailored to you. Whatever your fitness level or ability, DuoSwim lets you follow training plans designed by world-class coaches from your phone, apple watch or as a printable PDF.


Follow your recommended training plan, personalised to your fitness, ability and goals.
Work on yourself and your swimming goals with personal workouts and expert coaching. Join thousands of swimmers doing their workout whenever and wherever they want.

Say goodbye to classes and swim sessions - 24 hour fitness: train anywhere, anytime.
Join a motivating online community to share your successes and stay accountable.
The free version of the app contains signature workouts, a swim log, ability to track all your swim workouts and a growing community of swimmers across the world.

What you get by upgrading to DuoSwim Gold:


“A swimming journey for every goal.” Choose from 30 Training Journeys in the app, each with a different focus.


Progress in your training with hundreds of on demand workouts and technique videos.


Get pool & open water swim workouts on your phone, apple watch or as a printable PDF.


Combine data from your DuoSwim app with other important information available on the Health app


Whether you're swimming for fitness or training to race, DuoSwim will support your training and keep you motivated to achieve your goals.


Nutritious and tasty meals: learn how to prepare your food in a healthy way. Recipes for breakfast, lunch and dinner.


DuoSwim offers three subscription options: monthly, quarterly and yearly plans. The subscription is auto-renewable. This means that it will automatically renew unless you go to your account settings to manage your subscription. You can manage your subscriptions and turn off auto-renewal in account settings in the App Store after purchase.

By purchasing, you accept our Terms & Conditions (https://www.duoswim.com/terms-conditions) and Privacy Policy (https://www.duoswim.com/privacy-policy).
Contact us at support@duoswim.com or follow @duoswim on social media for workout inspiration.

What’s New

Version 3.4.4

Bug fixes and performance improvements

Ratings and Reviews

4.9 out of 5
63 Ratings

63 Ratings

ianinthesun ,

Perfect Swimming App

This app has everything you need to improve your swimming, whatever skill level you are currently at. With an easy-to-use interface, excellent features, and top-class advice, it’s got all you need to succeed in the pool. Would highly recommend if you want to become a better swimmer!

Developer Response ,

Hi, thanks for your feedback and for sharing it with us. We are delighted you like the app. 😀


Good, could be great

After using this for around a month, I switched back to MySwimPro since their system is smoother, but I genuinely love what Duo is doing by competing with SwimPro. There’s just a few things this app does that, if added or fixed, would make this THE swim app, undercutting SwimPro:

- On a guided workout, there’s no way to resync the watch timer with your pool’s pace clock. If you accidentally start it not exactly on the :57, you need to rely on the watch’s timer or be off set the entire workout. The same is true of if something in the lane takes you off pace (someone joins the lane, choking on water, suit malfunction, etc); you’re just stuck. Adding a “restart set” or “restart rep” button would be a massive improvement.

- The sets themselves are solid, excellent even. The problem is that the training path sets don’t change (or mine is bugged) from day to day; I was on Varying Pace for three days before I juststarted using the set library.

- Tracking is inconsistent, more inconsistent than using the Apple Watch’s swim workout tracking alone. A 1400yd swim might be recorded as 1000yd, heart rate data isn’t recorded, times are wrong sometimes… It’s just janky. Sending a workout to the watch takes a few tries, but I don’t fault Duo for this since every phone-watch connected app has this problem from time to time.

Swim Duo is an excellent app and what they’re doing is important; it just needs another round of deep cleaning. I’ll be back‽

Developer Response ,

Hi, thank you for your excellent feedback and sharing it with us. We really appreciate you taking the time to review DuoSwim and provide us with such detailed feedback, this is what makes our app better.

We’ve got a lot of improvements coming in v4 of DuoSwim which aligns well with your swimming requirements. We would love to know more about your needs around the timer and how we can help sync with an external timer on poolside. If you would like to chat about this, please send an email to our team at feedback@duoswim.com.

We’re sorry that you experienced a bug with your Personal Training Journey. We have fixed this issue, so you will now be able to move on from Varying Pace when you’ve completed that workout.

In terms of your third point, I’ve passed your feedback onto the development team for further investigation. We use Apple’s Watch sensors to track your swim so it might be a permissions issue that prevented you from seeing your heart rate etc. We will keep you updated.

IDW64 ,

Good, but missing key features

This app has many nice features a lot of other apps don’t have, but it doesn’t have many key features that I think are crucial for a good swimming app.

These include:
- The ability to review your splits after your swim
- The ability to track your splits over time (ie. Compare your splits on your last workout to splits from the same workout over the past few weeks)
- Measuring heart rate while you are swimming
- The ability to send your own workouts from your phone if you want to

App Privacy

The developer, DUO SWIM COACH LIMITED, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Health & Fitness
  • Contact Info
  • User Content

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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