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Review summary

Based on reviews, created with AI

Reviewers overwhelmingly had a great experience with this company. Customers consistently praise the app for its effectiveness in teaching proper workout techniques and nutrition tracking, highlighting its intuitive design and continuous improvements based on community feedback. Many users appreciate the AI assistant for personalized guidance and the comprehensive features that streamline their fitness journey, making it easy to build muscle and track progress without injury. The customer service is frequently described as outstanding, with prompt and helpful responses. However, some customers encountered issues with the subscription process, specifically regarding account creation and payment. These individuals reported difficulties logging in and setting up their accounts, with some experiencing app crashes during the password setup, which led to frustration and immediate cancellation of their subscriptions.

What people talk about most

Fitness

Consumers find fitness to be a positive and comprehensive experience. Many praise the AI trainer for... See more

Application

Clients share positive opinions on the app, praising its comprehensive features for tracking food macros,... See more

User experience

Customers consistently note positive experiences with the user experience. Many reviewers praise the app as... See more

Customer service

People report positive experiences with customer service. Customers consistently praise the team's... See more

Subscription

Reviewers highlight ambiguous aspects of the subscription. Some customers praise the app subscription as a... See more

Based on these reviews

Rated 4 out of 5 stars

Great app to learn how to workout like a pro and teach out how to track nutrition. The lessons are great for beginner and intermediate levels. I like how everything is based on the latest science and... See more

Company replied

Rated 5 out of 5 stars

I've been using BWS+ app for about 3 weeks now and I can say I'm really satisfied. The guidance about when to level up your volume is essential for me, mainly because keeps you motivated in every sess... See more

Company replied

Rated 5 out of 5 stars

I have been using Built With Science programs for several years now, first with pdfs and now with the app. Initially, I subscribed because of injuries that I did to myself after trying to follow worko... See more

Company replied

Rated 5 out of 5 stars

I cannot say enough good things about this app or the people behind it. As a "newbie" on a proper health and wellness journey,this has everything you could ever want just short of hiring a nutritionis... See more

Company replied


Company details

  1. Fitness and Nutrition Service

Written by the company

Built With Science is a fitness company founded by Jeremy Ethier in 2018, with a mission to revolutionize the fitness industry by replacing the myths and pseudoscience with a scientific and evidence-based approach. Our company offers personalized fitness plans, workout programs, and nutritional guidance, all based on the latest research findings. Built With Science collaborates with world-renowned scientists, funds research studies, and conducts experiments to ensure that their fitness programs are backed by credible scientific evidence. Our commitment to providing reliable information and delivering tangible results has earned us a reputation as a trusted and effective fitness resource.


Contact info

4.3

Excellent

TrustScore 4.5 out of 5

46 reviews

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Replied to 100% of negative reviews

Typically replies within 2 weeks

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Rated 5 out of 5 stars

Best Workout App EVER!

I downloaded this app after seeing their ad on a workout video on YouTube. That was 15 months ago and I haven’t looked back. I have transformed myself. Tons of great advice, videos that show you how to do the workouts. Tracks all of your food right down to the macros, and tons and tons of functionality that makes the app very personalized. The AI trainer that you can talk to anytime knows all of your workout and eating history so it gives you advice that is just for you. Somebody really thought this through before releasing it, and they add features all the time that just make it easier and easier to use. I could not be any happier.

1 April 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for the amazing review! 🎉 We’re thrilled to hear you’re enjoying the app. Your support motivates us to keep improving and delivering the best experience possible. If there’s ever anything we can do for you, don’t hesitate to reach out! Best, The Built With Science Team

Rated 5 out of 5 stars

This app is impeccable

This app is impeccable.
It's very thorough and helps you understand not only the importance of exercising but also about the importance of monitoring our nutrition. Highly recommend to anyone looking to invest in their health and wellness.

2 March 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for the amazing review! 🎉 We’re thrilled to hear you’re enjoying the app. Your support motivates us to keep improving and delivering the best experience possible. If there’s ever anything we can do for you, don’t hesitate to reach out! Best, The Built With Science Team

Rated 5 out of 5 stars

Very professional and helpful

Very professional and helpful, thank you!

25 March 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for the amazing review! 🎉 We’re thrilled to hear you’re enjoying the app. Your support motivates us to keep improving and delivering the best experience possible. If there’s ever anything we can do for you, don’t hesitate to reach out! Best, The Built With Science Team

Rated 5 out of 5 stars

My personal training app, forever!

I have used this for 14 months and counting! Absolutely incredible app. It not only gives me the most appropriate personal training plan for my goals, but it also keeps track of my weight and nutrition. I would absolutely recommend it!

24 March 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for the amazing review! 🎉 We’re thrilled to hear you’re enjoying the app. Your support motivates us to keep improving and delivering the best experience possible. If there’s ever anything we can do for you, don’t hesitate to reach out! Best, The Built With Science Team

Rated 4 out of 5 stars

Recommended!

Great app to learn how to workout like a pro and teach out how to track nutrition. The lessons are great for beginner and intermediate levels. I like how everything is based on the latest science and it explains the science and how to apply it. My only wish is the app tracked women's cycles. I believe that is in the works. They are great at listening to community feedback and constantly improving.

24 March 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you so much for your thoughtful review! We’re really glad to hear that you’re enjoying the lessons and finding value in both the science-based approach and how it’s applied.
We also appreciate you calling out cycle tracking. It’s something we know is important, and feedback like yours helps us prioritize what matters most to our community. We’re always working to improve the experience, so it means a lot that you’ve noticed our efforts to listen and evolve.
Thanks again for being part of the journey with us!

Rated 5 out of 5 stars

I’m a big fan of the app

I’m a big fan of the app with all of its features that make exercising and following nutrition easily. Everything you need is available in the app and is organized very well. I’ve been super happy to test the app and provide feedback. The team takes it super serious and is always trying to improve as much as they can.

23 March 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for the amazing review! 🎉 We’re thrilled to hear you’re enjoying the app. Your support motivates us to keep improving and delivering the best experience possible. If there’s ever anything we can do for you, don’t hesitate to reach out! Best, The Built With Science Team

Rated 5 out of 5 stars

Excellent, all you need

It is an amazing app that takes you by the hand and explains every step to become healthier, eat better and how to begin working out. Whether you're experienced in working out or not, it is a game changer.

22 March 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for the amazing review! 🎉 We’re thrilled to hear you’re enjoying the app. Your support motivates us to keep improving and delivering the best experience possible. If there’s ever anything we can do for you, don’t hesitate to reach out! Best, The Built With Science Team

Rated 5 out of 5 stars

Already very good, will only get better

The app really takes all the guesswork out of both workouts and nutrition, while simultaneously being tailored to your own personal life, experiences and situation. It's being actively improved, with major updates coming out regularly, and the team is really nice and responsive as well. Is it perfect? Not yet. But it's already very usable and it will only get better.

23 March 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for the amazing review! 🎉 We’re thrilled to hear you’re enjoying the app. Your support motivates us to keep improving and delivering the best experience possible. If there’s ever anything we can do for you, don’t hesitate to reach out! Best, The Built With Science Team

Rated 5 out of 5 stars

Really a great app that’s helped me in…

Really a great app that’s helped me in my fitness journey.

22 March 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for the amazing review! 🎉 We’re thrilled to hear you’re enjoying the app. Your support motivates us to keep improving and delivering the best experience possible. If there’s ever anything we can do for you, don’t hesitate to reach out! Best, The Built With Science Team

Rated 5 out of 5 stars

BWS is the legit best fitness app I've used

I can say unequivocally that BWS is the best fitness app I've encountered. While not perfect (what app is?), the seemingly minor gripes I have with it are things that are future fixes on the roadmap.

Not only is the app subscription a great bang for the buck, the customer service team has been super responsive to potential feature requests (such as adding a custom workout selector). Otherwise this is as close to perfect as an app I've used. It is a no BS, highly intuitive work that's well thought-out and actually *cares* about users, as opposed to things like MadMuscle that are an absolute moneygrab.

As someone that struggled with tracking nutrition (and impeded my own exercise goals as a result), BWS has been a massive help. Can't recommend it enough.

11 March 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for the amazing review! 🎉 We’re thrilled to hear you’re enjoying the app. Your support motivates us to keep improving and delivering the best experience possible. If there’s ever anything we can do for you, don’t hesitate to reach out! Best, The Built With Science Team

Rated 5 out of 5 stars

Fantastic programs and even better…

Fantastic programs and even better customer service!

I rarely leave reviews, but honestly the BWS workout programs are excellent—well-structured and easy to follow. I used to go to F45 before but by using this app, I feel more motivated to workout than ever.

What really prompted me to write a review was their customer service. I recently reached out to let them know I was facing an unexpected surgical procedure and wouldn’t be able to use the app for 3 months. Not only were they understanding, but they proactively extended my subscription so I wouldn’t lose out on the money I paid. Wow! 🤩

In a world where it’s hard to cancel things, it was incredibly refreshing to have a company voluntarily pause and extend my plan. A great product backed by a team with integrity. Thank you! 💜

5 March 2026
Unprompted review
Rated 5 out of 5 stars

I strongly recommand Built With Science

I have been using Built With Science programs for several years now, first with pdfs and now with the app. Initially, I subscribed because of injuries that I did to myself after trying to follow workout videos. I must say that this program helped me to improve a lot in my strengh and in my exercise form without any new injury. The nutrition advice are of great scientific value and help a lot if you stay consistent. The app adds very nice features such as the all-in-one place for the whole program, the AI which helped me to build a personalized program, and also the meal scan. I strongly recommanded this to any relative who wanted to start a serious workout and nutrition plan.

22 February 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for the amazing review! 🎉 We’re thrilled to hear you’re enjoying the app. Your support motivates us to keep improving and delivering the best experience possible. If there’s ever anything we can do for you, don’t hesitate to reach out! Best, The Built With Science Team

Rated 1 out of 5 stars

Its complicated and its a scam

Its complicated and i hate it also if you subscribe there is no way to unsubscribe unless you change your card

19 February 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for your review. We are happy to assist you with any technical issues you are experiencing. Please contact us at support@builtwithscience.com. Thank you!

Rated 5 out of 5 stars

Tried and True!

I LOVE BWS. The app is incredible, easy to use and they are consistently updating it and making it better. I had the pleasure of meeting Jeremy and his team at a focus group this summer, and to see how they all work together to make fitness easy and attainable for all people is incredible.

My own personal growth, both fitness and other wise, has been in large part to this company.

Keep up the great work guys, can’t wait to see what you do next!!!

3 February 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for the amazing review! 🎉 We’re thrilled to hear you’re enjoying the app. Your support motivates us to keep improving and delivering the best experience possible. If there’s ever anything we can do for you, don’t hesitate to reach out! Best, The Built With Science Team

Rated 5 out of 5 stars

It’s a good mix of workout and…

It’s a good mix of workout and nutrition tracking. I thought I could never replace cronometer but this has worked really well, but it’s also aware of my workouts and gives me guidance and videos. I like that I can say what gear I have and it tailors the workouts and gives me swaps. I look forward to the weekly nutrition adjustments which always make sense. The Jeremy ai feature is really good too, seems like it’s just ChatGPT but with full awareness of your nutrition and stats. Overall, I prefer this to the nippard and Israetel apps. I didn’t continue past the trial period with those, but I subscribed after the trial with this.

2 February 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for the amazing review! 🎉 We’re thrilled to hear you’re enjoying the app. Your support motivates us to keep improving and delivering the best experience possible. If there’s ever anything we can do for you, don’t hesitate to reach out! Best, The Built With Science Team

Rated 5 out of 5 stars

Awesome awesome awesome

Awesome awesome awesome! Love this app. I was a premium subscriber back when they used PDF’s and Google Sheets, and despite not being a fan of having to pay again for the app, overall — I’m so glad I did. Great app, user friendly and has everything you need in one place and with each update, it runs smoother and smoother. I would highly recommend

My one feedback is to add a way to sync with other apps like Fitbit, so it can track your steps.

29 January 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for the amazing review! 🎉 We’re thrilled to hear you’re enjoying the app. Your support motivates us to keep improving and delivering the best experience possible. We hope to make syncing with more apps a feature that is available in the future! Best, The Built With Science Team

Rated 5 out of 5 stars

Fantastic support

The app and programme provided was good and the support from Justin and the team is even better. Thank you

27 January 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for the amazing review! 🎉 We’re thrilled to hear you’re enjoying the app. Your support motivates us to keep improving and delivering the best experience possible. If there’s ever anything we can do for you, don’t hesitate to reach out! Best, The Built With Science Team

Rated 5 out of 5 stars

I couldn't recommend more.

I've been using BWS+ app for about 3 weeks now and I can say I'm really satisfied. The guidance about when to level up your volume is essential for me, mainly because keeps you motivated in every session. Also, Jeremy AI is really helpful when you don't know how much weight you should get for a specific exercise, for example. The results are REAL!! I couldn't recommend more.

4 January 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for the amazing review! 🎉 We’re thrilled to hear you’re enjoying the app. Your support motivates us to keep improving and delivering the best experience possible. If there’s ever anything we can do for you, don’t hesitate to reach out! Best, The Built With Science Team

Rated 5 out of 5 stars

BWS+ programme is excellent- try it!!!

I signed up about 7 months ago after seeing Jeremy's YouTube clips for a couple of years. I was spinning my wheels at the gym, no gains, still soft at the midsection; when he launched the challenge in the summer I decided to give it a try. I LOVE LOVE LOVE this app. I'm not good at tech and even I find it intuitive and easy to use but most importantly, it has motivated me to be disciplined and accountable to myself, with amazing results! The combination of training and nutrition advice and guidance is the secret- it's like having a personal trainer and diet expert in your pocket. Bonus- the AI Jeremy feature is very, very good; I feel like I am talking to a real person and advice is superb. BTW I'm 65 years old and have lots of gym experience but have never seen results like I'm getting with BWS+. If it can work for me it can work for anyone!

24 January 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for the amazing review! 🎉 We’re thrilled to hear you’re enjoying the app. Your support motivates us to keep improving and delivering the best experience possible. If there’s ever anything we can do for you, don’t hesitate to reach out! Best, The Built With Science Team

Rated 5 out of 5 stars

Best fitness app hands down

I cannot say enough good things about this app or the people behind it. As a "newbie" on a proper health and wellness journey,this has everything you could ever want just short of hiring a nutritionist or a trainer. It tracks your food and macros. Gives great workouts and schedules while also tracking reps and sets. The best part for me has been the AI feature. Has answered all questions and concerns. Its almost like having a coach you can talk to anytime. Would recommend this to anybody looking to better their health. Also the customer service has been outstanding which is an added bonus!

17 January 2026
Unprompted review
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Reply from builtwithscience.com

Hello! Thank you for the amazing review! 🎉 We’re thrilled to hear you’re enjoying the app. Your support motivates us to keep improving and delivering the best experience possible. If there’s ever anything we can do for you, don’t hesitate to reach out! Best, The Built With Science Team

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