# Underground Pilates Studio vs CONTROLOGY drhc

The clearest difference is ads: Underground Pilates Studio at none against CONTROLOGY drhc's shown. CONTROLOGY drhc's advantage is update cadence (every 2 weeks vs every 10 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Underground Pilates Studio ships an update every 10 months, CONTROLOGY drhc every 2 weeks. The most recent releases landed on September 19, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Underground Pilates Studio | CONTROLOGY drhc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/contrology-drhc/id6749075279/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Every 2 weeks** |
| Monetization | — | Ad-supported |
| Size | 124 MB | 85 MB |
| Requires iOS | 16.4 | **15** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Sutra Fitness, Inc.](https://appshunter.io/developer/914371834) | [Contrology LLC](https://appshunter.io/developer/1837001527) |

## What reviewers say

### 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


### CONTROLOGY drhc

[App page](https://appshunter.io/ios/app/contrology-drhc/id6749075279)

This app allows members to manage their gym accounts, including booking classes and signing up for events. Users can also update personal information and payment details.

**Highlights:** Reserve class spots, Sign up for gym events, Update headshots, Manage credit card on file, General account management

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Underground Pilates Studio free?

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

### Is CONTROLOGY drhc free?

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

### Do Underground Pilates Studio or CONTROLOGY drhc have ads?

CONTROLOGY drhc shows ads; Underground Pilates Studio does not.

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

Underground Pilates Studio ships an update every 10 months, and CONTROLOGY drhc every 2 weeks. Most recently, Underground Pilates Studio was updated on September 19, 2026 and CONTROLOGY drhc on September 8, 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.*