DuoSwim: Swim Workout App 4+

Swimming & Dryland Training

DuoSwim Coach Limited

Designed for iPhone

    • 4.8 • 96 Ratings
    • Free
    • Offers In-App Purchases


Say hello to your new swim coach! Swim faster, get stronger and reach your goals in the water with a personalized Training Plan in the DuoSwim app!

Start your journey today with a one week free trial!


Follow your recommended Training Plan, personalized to your fitness, ability and goals.

Work on yourself and your swimming goals with personal workouts and expert coaching.

Join thousands of swimmers completing their workout whenever and wherever they want.

Join a motivating online community to share your successes and stay accountable.

The free version of the app contains a swim log, the ability to track all your own swim workouts, and a growing community of swimmers across the world.

What you get by upgrading to Pro:


“A Training Plan for every skill level and goal.” Tell us about your swimming goals, and we'll design a Training Plan just for you! Each Training Plan will be tailored to your individual swimming speed and skill level.


Progress in your training with thousands of on demand workouts. Find a new personalized Workout of the Week in the app or choose from thousands of stroke specific workouts. Sync your smartwatch to follow your workouts set-by-set.

Easily adapt workouts to fit in with your schedule.


Get pool & dryland workouts on your phone, smartwatch or as a printable PDF. Track data such as distance, time, calories, heart rate, average pace and more when you pair a compatible smartwatch.


Perfect your swim skills and dryland technique with hundreds of educational videos from expert coaches.


Look out for our monthly swim challenges and complete alongside thousands of other swimmers in our community.


Combine data from your DuoSwim app with other important information available on the Health app to give you a picture of your daily activity.


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


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 3.8.9

This update brings performance improvements to elevate your experience.

Ratings and Reviews

4.8 out of 5
96 Ratings

96 Ratings

Swimming in NJ ,

Great - a few areas could be improved

Overall great app. I signed up for a free trial and after using 3 times bought a year’s subscription. Three areas I’d like to see improvements. One, the ability to see on my watch what is coming up next. I don’t see the next set until the final 10 seconds begin to count down and, if I need to put on or take off fins for example, I fall behind. Second, if I do fall behind it would be great to be able to pause or restart the set. As it is, I just usually skip one interval to get back on track. And lastly, sending the workouts to my watch (Apple SE) is glitchy at times and I need to reset the watch and/or my phone (has happened twice in the first 4x using it). But overall great and something I expect to use ongoing.

Developer Response ,

Hi, thanks for your excellent feedback, we really appreciate it. We have some great news! The development team are working hard to implement adjustable turnaround times and rest periods. This will be made available soon. We will keep you updated with our progress.

In terms of your other points, I will pass your feedback onto the development team for further investigation. Happy swimming!


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.

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. 😀

App Privacy

The developer, DuoSwim 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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