POWER+FLOW vs The Underground PHX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
POWER+FLOW
Discover and book fitness classes designed to enhance your life. This app offers high-intensity indoor cycling and strength training, available both in-studio and on-demand. Engage in community-based training to elevate your mind, body, and spirit.
- Book fitness classes
- Indoor cycling
- Strength training
- In-studio classes
- On-demand classes
- Community-based training
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Find and book fitness classes that add value to your life using or convenient app. POWER+FLOW is more than a boutique fitness studio. We understand that true growth comes from daily practice with the help of a solid community through both external and internal work. We offer high- intensity indoor cycling classes and strength classes you can do in-studio or on demand from anywhere. Add value to you life through community-based training that elevates your mind, body and spirit.
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 ads: POWER+FLOW at none against The Underground PHX's shown. POWER+FLOW also leads on ratings volume (299 vs 79). On price, rating, review sentiment and update cadence 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 POWER+FLOW against 5.0 for The Underground PHX. Both are backed by a comparable volume of ratings — 299 and 79 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
POWER+FLOW ships an update monthly, The Underground PHX every 3 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | POWER+FLOW | The Underground PHX |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (299 ratings) | 5.0 (79 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 299 — better | 79 |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone | iPhone |
| Requires iOS | 16.0 | 16.0 |
| Further details — not scored | ||
| Size | 38 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | POWERFLOW | Modern Yoga LLC |
Customer experience
POWER+FLOW
The Underground PHX
In-app purchases
POWER+FLOW
No in-app purchases
The Underground PHX
No in-app purchases
Questions
Is POWER+FLOW free?
Is The Underground PHX free?
Which has better reviews, POWER+FLOW or The Underground PHX?
Do POWER+FLOW or The Underground PHX have ads?
Which is updated more often, POWER+FLOW or The Underground PHX?
Other comparisons
