# POWER+FLOW vs The Underground PHX

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.

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.

## The numbers

| Metric | POWER+FLOW | The Underground PHX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (299 ratings)](https://appshunter.io/ios/app/power-plus-flow/id1513402724/reviews) | **[5.0 (79 ratings)](https://appshunter.io/ios/app/the-underground-phx/id6461867568/reviews)** |
| Number of ratings | **299** | 79 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Ad-supported | Ad-supported |
| Size | 38 MB | 37 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [POWERFLOW](https://appshunter.io/developer/1513402723) | [Modern Yoga LLC](https://appshunter.io/developer/1702757443) |

## What reviewers say

### POWER+FLOW

[App page](https://appshunter.io/ios/app/power-plus-flow/id1513402724)

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.

**Highlights:** Book fitness classes, Indoor cycling, Strength training, In-studio classes, On-demand classes, Community-based training

**Features:** macOS Compatibility, Apple Wallet, Vision Pro support

**In-app purchases:** none


### The Underground PHX

[App page](https://appshunter.io/ios/app/the-underground-phx/id6461867568)

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.

**Highlights:** Book classes, Check-in for class, Pre-order add-ons, Find classes by day, time, instructor, Explore instructors and playlists, Get promotion alerts

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is POWER+FLOW free?

POWER+FLOW is free to download, with no in-app purchases.

### Is The Underground PHX free?

The Underground PHX is free to download, with no in-app purchases.

### Which has better reviews, POWER+FLOW or The Underground PHX?

The Underground PHX is rated higher. POWER+FLOW averages 5.0 out of 5 from 299 ratings, while The Underground PHX averages 5.0 from 79 ratings.

### Do POWER+FLOW or The Underground PHX have ads?

The Underground PHX shows ads; POWER+FLOW does not.

### Which is updated more often, POWER+FLOW or The Underground PHX?

POWER+FLOW ships an update monthly, and The Underground PHX every 3 weeks. Most recently, POWER+FLOW was updated on October 23, 2026 and The Underground PHX on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*