# RE24 vs Underground Pilates Studio

RE24 and Underground Pilates Studio are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

RE24 ships an update every 8 months, Underground Pilates Studio every 10 months. The most recent releases landed on October 21, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | RE24 | Underground Pilates Studio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/re24/id6471389528/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 10 months |
| Monetization | Free | — |
| Size | 452 MB | 124 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 12+ |
| Developer | [ZIFIT LA JOLLA, INC.](https://appshunter.io/developer/1468958805) | [Sutra Fitness, Inc.](https://appshunter.io/developer/914371834) |

## What reviewers say

### RE24

[App page](https://appshunter.io/ios/app/re24/id6471389528)

Experience a full-spectrum infrared sauna with guided virtual instructors for personalized workouts. Enjoy diverse fitness classes like yoga, cycling, and rowing, from 10 to 30 minutes, plus access to a functional training area.

**Highlights:** Full-spectrum infrared saunas, Virtual instructor guidance, Result-driven fitness classes, Yoga, cycling, rowing, 10-30 minute workout sessions, Functional training area

**Features:** macOS Compatibility

**In-app purchases:** none


### Underground Pilates Studio

[App page](https://appshunter.io/ios/app/underground-pilates-studio/id6740875130)

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

**In-app purchases:** none


## Frequently asked questions

### Is RE24 free?

RE24 is free to download, with no in-app purchases.

### Is Underground Pilates Studio free?

Underground Pilates Studio is free to download, with no in-app purchases.

### Do RE24 or Underground Pilates Studio have ads?

Neither RE24 nor Underground Pilates Studio shows ads.

### Which is updated more often, RE24 or Underground Pilates Studio?

RE24 ships an update every 8 months, and Underground Pilates Studio every 10 months. Most recently, RE24 was updated on October 21, 2026 and Underground Pilates Studio on October 7, 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.*