Optimyze vs The Underground PHX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Optimyze
Plan and schedule your classes with ease. View class schedules, sign up for sessions, and find studio location information directly from your mobile device. Optimize your time and enhance convenience.
- View class schedules
- Sign up for classes
- View studio location
- Optimize time
- Schedule classes
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Download the Optimyze App today to plan and schedule your classes! From this mobile App you can view class schedules, sign-up for classes, as well as view the studio’s location information. Optimize your time and maximize the convenience of signing up for classes from your device! Download this App today!
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.
Screenshots
Verdict
The clearest difference is review sentiment: The Underground PHX at 100% against Optimyze's 0%. The Underground PHX also leads on rating (5.0 vs 4.0) and ratings volume (73 vs 2). Optimyze's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 16.0). On price, update cadence, ads and in-app purchases 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.
The Underground PHX holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: The Underground PHX has 73 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of Optimyze's written reviews are positive against 100% of The Underground PHX's.
Optimyze ships an update monthly, The Underground PHX every 3 weeks. The most recent releases landed on October 2, 2026 and October 13, 2026 respectively.
| Parameter | Optimyze | The Underground PHX |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (2 ratings) | 5.0 (73 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 | 73 — better |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 14.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 123 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | The lab phx llc | Modern Yoga LLC |
Customer experience
Optimyze
The Underground PHX
In-app purchases
Optimyze
No in-app purchases
The Underground PHX
No in-app purchases
Questions
Is Optimyze free?
Is The Underground PHX free?
Which has better reviews, Optimyze or The Underground PHX?
Do Optimyze or The Underground PHX have ads?
Which is updated more often, Optimyze or The Underground PHX?
Other comparisons
