# The Underground PHX > Fitness class booking and studio management app. (iPhone/iPad app by Modern Yoga LLC.) - Source: https://appshunter.io/ios/app/the-underground-phx/id6461867568 (this page in markdown: same URL + `.md`) - Developer: [Modern Yoga LLC](https://appshunter.io/developer/1702757443) - Category: Health & Fitness, Lifestyle - Price: Free - Rating: 5.00/5 from 73 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 16.0 · 37 MB - Languages: English, French, Japanese, Spanish - Released: 2023-08-22 - Data updated: 2026-08-17 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/the-underground-phx/id6461867568/reviews.md ## What is The Underground PHX? Unparalleled classes, dope instructors and the most funky, inspired playlists combine forces to create The Underground Method workout. Get the app & book your ride, check-in for class before you get to the studio, shop or pre-order add-ons like a water bottle & towel all from your phone! GET THE 411 > Find classes by day, time and instructor. > Buy classes quickly and ahead of time. > Explore instructors and playlists. > Get alerts for exclusive promotions and new merch drops. ## Key features - Book classes - Check-in for class - Pre-order add-ons - Find classes by day, time, instructor - Explore instructors and playlists - Get promotion alerts ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/the-underground-phx/id6461867568/reviews.md ### 5/5 — The best spin app! *2024-06-02* This is the best place to spin and the app is awesome! ## Frequently asked questions about The Underground PHX ### Does The Underground PHX have ads? Yes, The Underground PHX contains advertisements. This is common for free applications that offer services like class booking and studio management. ### What is the rating for The Underground PHX? The Underground PHX has an excellent rating of 5.0 stars, based on 60 user reviews. This indicates a high level of user satisfaction with the app's features and performance. ### How often is The Underground PHX updated? The latest version of The Underground PHX is 3.52.0, and it was last updated on October 7, 2025. This suggests a consistent update schedule to improve functionality and user experience. ### What devices support The Underground PHX? The Underground PHX is currently supported on iPhones. Users with other devices may not be able to access the application at this time. ### What age rating is The Underground PHX? The Underground PHX has an age rating of 4+. This means it is suitable for users of most ages, with no significant content restrictions. ### Can I book classes ahead of time with The Underground PHX? Yes, you can book classes quickly and ahead of time using The Underground PHX. The app allows you to secure your spot before arriving at the studio. ### Does The Underground PHX offer information on instructors and playlists? Yes, The Underground PHX allows you to explore instructors and their associated playlists. This feature helps users find classes that match their preferences. ## Version history (last 5 releases) ### 3.62.0 — 2026-05-11 We're always working to improve your experience. This update includes bug fixes and general app maintenance. Stay tuned for future updates! ### 3.52.0 — 2025-10-07 We're always working to improve your experience. This update includes bug fixes and general app maintenance. Stay tuned for future updates! ### 3.51.0 — 2025-09-17 We're always working to improve your experience. This update includes bug fixes and general app maintenance. Stay tuned for future updates! ### 3.50.1 — 2025-08-26 We're always working to improve your experience. This update includes some general app maintenance. Stay tuned for future updates! ### 3.50.0 — 2025-08-25 We're always working to improve your experience. This update includes some general app maintenance. Stay tuned for future updates! ## Apps similar to The Underground PHX | App | Rating | Price | Category | | --- | --- | --- | --- | | [GROUNDWRK](https://appshunter.io/ios/app/groundwrk/id6752626743) | 5.0 (51) | Free | Health & Fitness | | [Sweatshop On Central](https://appshunter.io/ios/app/sweatshop-on-central/id1281703390) | 4.0 (4) | Free | Health & Fitness | | [POWER+FLOW](https://appshunter.io/ios/app/power-plus-flow/id1513402724) | 5.0 (287) | Free | Health & Fitness | | [NYX Cycle+Fitness.](https://appshunter.io/ios/app/nyx-cycle-plus-fitness/id6757423019) | — | Free | Health & Fitness | | [Body Politik](https://appshunter.io/ios/app/body-politik/id6448642487) | 5.0 (66) | Free | Health & Fitness | | [NYX Cycle + Fitness](https://appshunter.io/ios/app/nyx-cycle-plus-fitness/id6472727343) | 5.0 (99) | Free | Health & Fitness | ## More apps by Modern Yoga LLC - [Modern Yoga](https://appshunter.io/ios/app/modern-yoga/id1089003315) All apps by Modern Yoga LLC: https://appshunter.io/developer/1702757443 --- *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 2026-08-17.*