# Castle Flexx — Keep moving... > Shop for pain relief devices and access training programs for chronic pain management. (iPhone/iPad app by Castle Flexx.) - Source: https://appshunter.io/ios/app/castle-flexx/id6450963146 (this page in markdown: same URL + `.md`) - Developer: [Castle Flexx](https://appshunter.io/developer/1695941246) - Category: Health & Fitness, Medical - Price: Free - Rating: 3.10/5 from 30 App Store ratings · 15 written reviews indexed - Age rating: 4+ - Requires: iOS 16.4 · 80 MB - Languages: Canadian English, Arabic, Croatian, Czech, Dutch, Filipino, Finnish, Canadian French, German (Germany), Hebrew and 18 more - Released: 2023-07-13 - Data updated: 2026-08-07 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/castle-flexx/id6450963146/reviews.md ## What is Castle Flexx? The Future of Mobility is here. We design award winning devices that address the root cause of common chronic pain issues. We've kept our app very simple: Shop or Train (FlexxLab) Chronic Pain issues we address: Plantar Fasciitis Back Pain (L4 L5) Shoulder Impingement Hip Pain Tight Calves Tight Hamstrings Achilles Wrist and forearm Tech Neck ## Key features - Shop for pain relief devices - FlexxLab training section - Addresses chronic pain issues - Supports iPhone and iPod - Designed for mobility ## Recent user reviews (10 of 15) All indexed reviews: https://appshunter.io/ios/app/castle-flexx/id6450963146/reviews.md ### 1/5 — Terrible, worthless *2026-07-19* The Castle Fit membership is worthless. Unable to sign in for weeks on the app to access classes. Castle Flexx is unable to resolve the issue despite promises to do so. Don’t waste your money. ### 1/5 — Product is great, App is hot garbage *2026-07-03* App is mostly marketing trying to sell me the product. I already bought it, just stop!!! I purchased a membership for the videos, but literally can’t get one video from the app. Just puts me in a perpetual loop for login, and then shows ,y receipt showing I did indeed pay, but can’t access any videos!!! Other reviews show this has been a problem for years. They need to fix and/or refund any membership costs. Product is great, app and videos are terrible. ### 1/5 — AVOID! Save your money! *2026-04-27* The app isn’t really made for streaming on devices like Apple TV or an iPad which makes it really challenging to use and watch the videos while using the Castle Flexx.  The very first two videos for beginners is literally split in half and just start/stop abruptly.  It should just be one video.  I’ve spent more time trying to get logged in and play a video to the point where it’s not even worth the money!!  I paid for a year subscription and it’s awful.  I’m immediately turned off by the whole thing.  Absolutely terrible!! Stay far, far away from this company! Don’t buy any of their products. Their customer service is also the worst!!! After I gave CastleFit a 1 star review they offered me a 40% refund if I would change my review! ### 1/5 — Why *2026-04-14* App is terrible. Had to sign in multiple times, it’s super slow. Search function is useless. ### 1/5 — App is slow *2026-04-04* The app is slow and non responsive and very hard to use. It’s close to worthless. ### 1/5 — Horrible App *2026-01-04* Not sure what they are thinking with the app. You might as well go to their website as this is not a Mobile app. For 1, I'm not looking to buy more products, I JUST bought a subscription to the classes and just want to use the videos that I subscribed to. I click on the castlefit login and classes login and I'm taken to my orders upon sign in and then when I move to go back I have to sign in again. Not user friendly and is very frustrating. If I could give negative stars, I would. Might cancel my subscription. They need 2 different apps if they want to push product and 1 dedicated to the videos!! ### 1/5 — Don’t waste your money *2025-09-22* Each video is split into numerous parts. So about 8 minutes into a class, mid stretch the video abruptly ends and you have to start the next video to continue the clsss. Frustrating. ### 1/5 — App is terrible *2025-06-19* The product seems fine, but the app is horrible. I’ve had to log in three times so far to get to the videos. The app seems primarily around selling more products and not about helping users access the videos. ### 5/5 — New app is AMAZ *2025-04-07* The new app they just released/ updated is soooo much better than the original. Now i can mirror and stream and tap into my classes anytime. Before you couldnt, now you can. So its now 5 stars as of April 2025! ### 2/5 — Can’t see any value *2024-12-03* Sends me to sign in page and says enter passcode emailed but nothing is ever sent. This seems as legit as the overpriced stretching device ## Frequently asked questions about Castle Flexx ### What chronic pain issues does Castle Flexx address? Castle Flexx addresses a range of chronic pain issues including Plantar Fasciitis, Back Pain (L4 L5), Shoulder Impingement, Hip Pain, Tight Calves, Tight Hamstrings, Achilles issues, and Wrist and forearm pain, as well as Tech Neck. ### What are the main functions of the Castle Flexx app? The Castle Flexx app has two primary functions: users can shop for award-winning devices designed to address chronic pain, or they can access the FlexxLab section for training programs. ### What devices does Castle Flexx support? Castle Flexx is supported on iPhone and iPod devices. ### Is Castle Flexx free to download? Yes, Castle Flexx is free to download and use. However, it does contain advertisements. ### How accurate is the data in Castle Flexx? The app focuses on device sales and training programs rather than tracking personal health data, so data accuracy in terms of user metrics is not applicable. ### When was Castle Flexx last updated? The latest version of Castle Flexx is 3.7, and it was last updated on March 6, 2026. ### What is the age rating for Castle Flexx? Castle Flexx has an age rating of 4+, making it suitable for a wide range of users. ### Does Castle Flexx offer any health integrations? The provided information does not mention any specific health integrations with other platforms or devices. The app's focus is on its own product offerings and training. ## Version history (last 5 releases) ### 4.2 — 2026-08-05 • New and improved user accounts • Easier and faster checkout • View and keep track of your orders ### 4.1 — 2026-07-21 • New and improved user accounts • Easier and faster checkout • View and keep track of your orders ### 4 — 2026-07-15 • New and improved user accounts • Easier and faster checkout • View and keep track of your orders ### 3.9 — 2026-04-21 • New and improved user accounts • Easier and faster checkout • View and keep track of your orders ### 3.8 — 2026-04-03 • New and improved user accounts • Easier and faster checkout • View and keep track of your orders ## Apps similar to Castle Flexx | App | Rating | Price | Category | | --- | --- | --- | --- | | [TWS Training](https://appshunter.io/ios/app/tws-training/id1595137752) | 4.5 (15) | Free | Health & Fitness | | [Katalyst](https://appshunter.io/ios/app/katalyst/id1558163458) | 4.6 (58) | Free | Health & Fitness | | [X3 Force](https://appshunter.io/ios/app/x3-force/id1571190223) | 4.1 (19) | Free | Health & Fitness | | [Fiix Body](https://appshunter.io/ios/app/fiix-body/id1562886855) | 4.7 (297) | Free | Health & Fitness | | [Airofit](https://appshunter.io/ios/app/airofit/id1469023267) | 4.5 (1,338) | Free | Health & Fitness | | [Chirp Halo](https://appshunter.io/ios/app/chirp-halo/id6501977111) | 4.0 (4) | Free | Health & Fitness | --- *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 2026-08-07.*