# Undersun Fitness — user reviews

> 96 indexed App Store user reviews of Undersun Fitness by Heros Life LLC, rated 2.82/5 from 49 ratings.

- Source: https://appshunter.io/ios/app/undersun-fitness/id1519951676/reviews
- App overview in markdown: https://appshunter.io/ios/app/undersun-fitness/id1519951676.md
- Rating breakdown: 5★ 19 · 4★ 0 · 3★ 3 · 2★ 7 · 1★ 20

## What do users think of Undersun Fitness?

Overall sentiment: negative

**Pros**

- 👍 Clear and concise exercise video demonstrations
- 💪 Effective workout programs with proven results
- 🎯 Convenient band-based training for travel
- 📱 User-friendly interface design
- ⏱️ Rest timer between sets
- 📊 Workout progress tracking and logging
- 🎬 High-quality video content
- 👨‍💼 Excellent customer support staff
- 📅 Workout calendar and scheduling

**Cons**

- 🐛 Frequent app crashes and freezes
- 🔴 Regular server downtime and outages
- ❌ Videos fail to load or play
- 🔐 Login and authentication issues
- 📉 Loss of workout data and progress
- 🎥 Mismatched exercise videos and descriptions
- ⚠️ App redesign removed key features
- 🔄 Syncing issues between platforms
- 📵 App only works in portrait mode
- ⏰ Rest timer stops when switching apps
- 🚫 Cannot edit logged data after submission
- ❓ Confusing dual account system
- 💸 Requires repurchase on app despite prior purchase

**Commonly reported bugs**

- App crashes between workout modules
- Videos don't load or get stuck buffering
- Password reset email links don't work
- Login credentials not recognized despite valid account
- Error 500 server errors
- SSL certificate errors preventing access
- Workout progress not saved after app crashes
- Exercise pictures don't match descriptions
- Videos play from middle instead of beginning
- Skips rest periods between exercises
- Doesn't recognize completed workouts
- Timezone changes corrupt workout schedule
- Discount codes don't work
- Separate app and website account systems
- Videos don't play for specific programs (e.g., arm day)
- Band selection options missing for certain exercises
- Incorrect exercise order in programs
- Notification reminders appear after workouts completed

**Most requested features**

- Ability to view previous workout data during current workout
- Edit logged reps and band selections after submission
- Landscape mode support for tablets
- Apple Watch and Apple Health integration
- Offline/downloadable content for no-internet workouts
- Text-only workout option without auto-playing videos
- Flexible workout scheduling with time changes
- Weekly and monthly workout summaries
- Better band stacking tracking for multiple bands
- Deferred workout reminders
- Notes feature for each set
- Improved calendar interface with better visualization
- Web-based backup synchronized with app
- More diverse exercise options and advanced programs

## Newest reviews (13 of 96)

### 2/5 — Great workout program, the app is terrible…

*2023-07-18*

The workout program is great, but the app is down regularly which is extremely frustrating. They completely changed the format of the app a few months back but unfortunately did not seem to fix any of the bugs. It’s almost always a waiting game (sometimes taking days) to get access back to your workout program.

### 2/5 — Was good, now terrible. Chase is still the man.

*2023-02-27, version 1.5.5*

Chase, the customer support guy and Under the Sun is fantastic. Give that man a raise.

What was a functional workout tracker and instructional video at the start of each exercise is no longer available. It’s just a long string of what’s YouTube videos. It’s a shame as the content is good. There was a note in the Facebook group that they intend to restore some of the functionality by Spring 2023, but they’re changes too slowly to keep customers happy.

### 2/5 — Was great not so much

*2023-01-23*

It has been in here since I have used this my app I wanted to use it again. It was great for my weight loss and strength training. I do not like this current app, you can’t track your set or reps. This is a down grade from how it used to be! The workouts them selves are great but the deliver could be better! Customer services has always been great for me so no complaints there.

### 3/5 — It’s fine. Equivalent to Reddit workouts

*2022-12-14, version 1.5.3*

Use the code WEP0ND that was in my bag. 

Workouts are just pictures. Broken down by month? Not a fan of the select program.

### 3/5 — Usable

*2022-06-28, version 1.5.3*

App is usable. Odd dual account stuff between the website and app had me pulling my hair out. You have to use the code as a coupon when checking out. Never seen something like that.

### 2/5 — Activation problematic

*2022-06-28*

Works on line but app doesn’t work

**Developer response:** Hi there. Please be sure to create a separate login for the app. If you need any assistance, please contact us directly at Support@UndersunFitness.com. Thank you.

### 1/5 — App no longer works

*2022-06-03*

The app has always been buggy, but at least it was functional. Unfortunately it stopped working today completely due to a server issue. I got to my gym and was unable to workout.

**Developer response:** Hello Marcus, did your problem get resolved? If not, we are here to help you! Please do let us know at Support@UndersunFitness.com.

### 1/5 — Videos don’t play in app

*2022-05-16*

I can not Watch videos in every program

**Developer response:** Hi Karpan,

Apologies for any confusion. A subscription will grant access to all TA2 Training Programs. If you need assistance with your order, please contact us directly at Support@UndersunFitness.com.

### 1/5 — Lost Purchased TA2 Burn Program

*2022-03-18, version 1.5.3*

Being on the third week of the beginners program, suddenly the app has log me out for no reason, many difficulties to log back in! Once login lost the program with all the stats, tried to restore subscription, it does not recover it, tried to redeem license code, an error pops saying the code is already used!
I have tried to contact support using the app and by email and not response whatsoever has been given.
Additionally the app when it was working, the videos gets stuck, jumps into different exercises not taking any rest… very frustrating!

### 3/5 — Support staff is great, app needs improvement

*2022-02-14*

I’m primarily giving this app 3 stars instead of 2 because of the support staff. When I’ve reached out with questions or concerns, they’re not only responsive but tremendously helpful.

With that said, I’ve been using the app since it switched from the web browser. There have been some improvements to clean up the look and feel, but the Bodyshock program is very glitchy. Using my iPad pro, I experienced the following:
* At the end of one exercise, the program skipped to the next exercise providing no rest between the TABATA exercises. The HIIT ones appeared to be fine
* Progress is not saved. I got to the second last activity and the app crashed. I opened it back up to try and get back to my last point but had to start completely over.
* You have the option to select a specific leg (HIIT or TABATA and 1st/2nd/3rd) but when you click the video to watch, it shows the beginning video
* This app is still not developed to function in landscape mode. I have to turn my iPad until I get to the video of the activity where I can then turn it to landscape. App functionality never works in landscape.

With the exception of that last bullet, the others made it difficult to complete my workout. The Build program is way more functional and avoids the skipping from workout to workout. If I ever need to skip a particular activity, the skip feature in Build is way more functional and responsive too. In Bodyshock, the load time between workouts causes way too much of a delay for it to be worth your while.

So, to summarize:
1st star - Activities are instructors are great
2nd star - App > web site version even with the glitches
3rd star - Support staff deserves some praise for some of the flaws in the app (realistically, this would be 1/2 star if I could since this is an app review).

**Developer response:** Hi, We've forwarded your feedback to our developers. Thank you for taking out the time to send us your suggestions!

### 3/5 — Good but a lot of glitches

*2022-02-10, version 1.5.2*

This app has some good workouts, but there are a lot of mistakes here and there. Some of the pictures don’t match or the video goes with the wrong workouts, some of the bands aren’t listed when finishing a workout. With some common sense you can bypass the mistakes and get a good work out. For the price I’m not really bothered by the mistakes, but surprised they haven’t fixed the issues.

### 1/5 — Horrible app

*2022-02-08, version 1.5.2*

Workouts are great and I love the bands but to pay for an app that doesn’t work is ridiculous. It freezes up all the time and each video starts in the middle of the workout so the timing is all off. I was trying the bodyshock one and Then when it freezes you have to start back from beginning so you can’t go from where you last were. It got stuck on 1 workout and it wouldn’t let me skip to where I needed to be so I have to force quit then start all over again.
I guess im just gonna figure out my own workouts with bands.  App is too frustrating to use.

### 4/5 — Tracking on the workout sheets

*2022-02-05*

I really like this app and the TA2 programs.
There are a few minor issues, like pictures for an exercise not being the correct picture for that exercise . 

But what I am wondering is why can’t you have the workout cards record what you use 
rep and band wise with a checkmark next to each band you use and after it is checked it can record it on the card. The Rolodex type of recording can only track 1-2 bands per exercise. 

Let’s say you stack a heavy, medium and light band for squats, the app only allows two bands at most to be recorded. Plus in the superset exercises there is no recording available for the second exercise?

So I end up recording on paper with the app
so I can get all bands used and exercises recorded. I guess you guys didn’t think about band stacking when the app was made?

But I must say, the TA2 build has produced for me better results than free weights, and I have a boat load of injuries that make free weights impossible now. Knee replacements,
two shoulders that need replacing, and a hernia mesh removal that is my worst surgery yet! I lost my right testicle. Most people will never workout after that surgery. Especially if you have a total abdominal rebuild using your own bodies tissue. After every workout my stomach is swollen severely.

But if I had not found Undersun , I would be severely depressed and we all know what that can lead to. Thanks guys from saving me from becoming a statistic, I have been working out since I was 13, and that becomes a defining part of your life after 48 yrs of doing it. The app is great, just needs to be able to record all bands used. Kind regards.

**Developer response:** Hey there, Thank you for providing your feedback. We truly appreciate it and would to address your concerns. Please contact us directly at Support@UndersunFitness.com. Thank you!

## Most critical reviews (10 lowest-rated)

### 1/5 — Can’t sign in

*2023-07-29, version 1.5.6*

I had purchased program back in 2020. Order#36686. Now I try to sign in, it says incorrect password. I tried to reset password, I don’t get an email link to reset it. I don’t even know if you guys deleted my account coz it was so old.

### 1/5 — It’s now even worse than it was before

*2023-05-23*

They took whatever tiny bits of this app that were working and ruined them as well. You know have to skip through each video to reach the exercise you’re looking for. Calendar completely useless. A real shame.

**Developer response:** Hi Royherm. We truly appreciate your patience with us as we do our best to provide you with a great App you'll be happy to use. Our App is in Beta phase and still has a few kinks to work out before it is officially ready to use as a tool to help you stay on track with your fitness journey.

### 1/5 — Great program, terrible app

*2023-03-26, version 1.5.5*

The app used to be useful, there were some issues but you could make your way through a workout. I’m not sure why Undersun took such a huge step backwards with this app but you can no longer track weight (band size,) sets, or reps.it’s mind boggling how a company can take something somewhat useful and get rid of most of the features. Shaking my head at how bad this thing is as I delete the app and move on to something different.

### 1/5 — Old version better

*2023-02-08*

This version has great video quality but that’s where it stops. They got rid of the workout log, and videos that were attached to each exercise. Now the video is continuous and you have to manually pause as you progress through each exercise. Disappointing choice by Undersun.

### 1/5 — Terrible upgrade

*2023-01-29*

You guys had an amazing app before . This new app is absolutely terrible . The videos don’t even work! I lost all my prior content that I paid for .. what gives

For some reason every single arm day video doesn’t play

### 1/5 — Don’t Buy for Build Advance

*2022-09-08*

This program is seriously below par for Undersun.  It’s completely unusable and clearly was rushed just to get it out there. There’s no rest timer, no instructions for the sets, it’s nothing like the other programs.  I hope they consider redoing Build advance.

**Developer response:** Thank you for providing your feedback with our App.
For more suggestions how we can improve our app, please let us know at Support@UndersunFitness.com.

### 1/5 — Lack of customer service and app/website issues

*2022-08-03*

Customer service never answered my emails and it has been well past 48 hours. Also trying to log on to the website but unable to because I purchased through the App Store. App is a bit clunky too with how the work outs are. I’m a fan of James but the app itself and customer service aren’t so great.

### 1/5 — App is down again today 7/18/2022

*2022-07-18, version 1.5.3*

Error URLSessionTask failed with error: The certificate for this server is invalid

### 1/5 — waste of time and money / concern for my phone/personal info

*2022-06-11*

Got the muscle building program, just to have the app mess up and change my account to some random account i’ve never heard of or seen, and then the app refused to let me sign back in with my actual account as if my account was tampered with, so no more programs for me even tho i wasted money on it

**Developer response:** Sorry about this issue. Please contact us at Support@UndersunFitness.com and let us know the issue you encountered. We would be glad to help with this. Hope to hear from you soon.

### 1/5 — Has been down for two days

*2022-06-03*

Can’t access

**Developer response:** Our technical team has solved this problem. Please update your app to the latest version. If you have other problems, please contact us at Support@UndersunFitness.com.

## Most praised reviews (10 highest-rated)

### 5/5 — So good 😍

*2023-03-23*

So good :)

### 5/5 — Very satisfied

*2023-01-23*

I love the convenience of band workouts - especially when I am traveling. Finding a gym to workout or competing for use of the limited facilities in motels is frustrating. I decided to try using bands but first wanted to find a complete workout using bands. I found a number of individual exercises online but wanted a complete workout from one site. That is when I discovered the TA2 program. 

I have been using TA2 for 3 months and find it efficient and effective. The program is a total body workout spread over 5 days with 2 days test each week and has 3 cycles that are each 4 weeks long. The video demonstrations are clear, concise, and helpful. You can use any brand of band but the Undersun bands are well-made so I purchased those.

I reached out to Undersun on two occasions when I ran into a problem accessing the program - a password issue on both occasions. Chase responded within 24 hours both times and the issues were resolved quickly.

In short, this is a good band exercise program, good bands, helpful videos, and great customer service.

### 5/5 — I’m an idiot

*2022-11-06, version 1.5.3*

Don’t think my review got posted yet anyway, but it turns out it was user error on my part so I apologize for the previous scathing review. 

App works as it should, videos are good.  Starting my second course now.

### 5/5 — Love My App

*2022-07-23*

I have been using this App for two weeks and absolutely love it !  It’s very user friendly, the workout log keeps track of your progress and the supporting training video that accompanies each exercise gives you the confidence that you are performing it correctly.

### 5/5 — I love the app

*2022-07-02*

The app is really easy and convenient to use

### 5/5 — I really like the advance build

*2022-06-03, version 1.5.3*

There is some great new exercises

### 5/5 — Great way to build strength and fitness

*2022-02-12, version 1.5.2*

I’ve been using Undersun bands for a while -in the UK, Germany, Austria and Spain, you really can train anywhere, anytime, great app to keep you on track.

### 5/5 — Undersun Outstanding App

*2021-11-16, version 1.4*

Glad I found the program & app. Switched to resistance band only workout couple years ago due to age and bad shoulders/knees. This app is super user friendly and the program is great so far

### 5/5 — Amazing App and Equipment

*2021-09-01, version 1.4*

I love how easy they are to store and travel with. Great exercises and love that I can have the app on my phone when I go for a run with the bag and then pull the bands out and exercise at the park. Such amazing and diverse exercises during a time where Gyms are shut. Love that I got my program always available to go . Saves a lot of money on personal trainers.

### 5/5 — Great app

*2021-04-11, version 1.3*

Great app to use anywhere

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-23.*