The Underground PHX vs My Karma Studio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
The Underground PHX
Book fitness classes, discover instructors, and explore playlists. This app allows you to reserve your spot, check in, and even pre-order studio add-ons directly from your phone.
- Book classes
- Check-in for class
- Pre-order add-ons
- Find classes by day, time, instructor
- Explore instructors and playlists
- Get promotion alerts
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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.
My Karma Studio
Easily browse and purchase class packs or membership options. Book your class reservations and manage your schedule to stay organized and committed to your fitness goals.
- Purchase class packs and memberships
- Browse class schedules
- Manage class reservations
- Track upcoming classes
- Stay organized with fitness goals
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Features: -Purchase Class Packs and Memberships Easily browse and purchase our class packs or membership options -View our schedule -Manage your reservations Book your class reservations with ease. Keep track of your upcoming classes and manage your schedule to stay organized and committed to your fitness goals.
Screenshots
Verdict
The clearest difference is ads: My Karma Studio at none against The Underground PHX's shown. My Karma Studio also leads on monetization model (free vs ad-supported). On price, rating, review sentiment and ratings volume there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for The Underground PHX against 4.9 for My Karma Studio. Both are backed by a comparable volume of ratings — 79 and 115 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
The Underground PHX ships an update every 3 weeks, My Karma Studio every 4 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.
| Parameter | The Underground PHX | My Karma Studio |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (79 ratings) — better | 4.9 (115 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 79 | 115 — better |
| Update frequency | Every 3 weeks — better | Every 4 weeks |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone | iPhone |
| Requires iOS | 16.0 | 16.0 |
| Further details — not scored | ||
| Size | 37 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | Modern Yoga LLC | Karma Studio North Scottsdale LLC |
Customer experience
The Underground PHX
My Karma Studio
In-app purchases
The Underground PHX
No in-app purchases
My Karma Studio
No in-app purchases
Questions
Is The Underground PHX free?
Is My Karma Studio free?
Which has better reviews, The Underground PHX or My Karma Studio?
Do The Underground PHX or My Karma Studio have ads?
Which is updated more often, The Underground PHX or My Karma Studio?
Other comparisons
