# Stretch U | vs Parabon CTX Study App

The clearest difference is iOS requirement: Parabon CTX Study App at 13.0 against Stretch U |'s 16.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 5, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Stretch U | | Parabon CTX Study App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (13 ratings)](https://appshunter.io/ios/app/stretch-u/id1038231071/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 88.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 191 MB | 10 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stretch Management LLC](https://appshunter.io/developer/1538895694) | [Parabon NanoLabs, Inc.](https://appshunter.io/developer/1401016241) |

## What reviewers say

### Stretch U |

[App page](https://appshunter.io/ios/app/stretch-u/id1038231071)

Plan and schedule your stretching sessions directly from your device. View availability, sign up for classes, and make purchases. Optimize your time and enjoy the convenience of managing your fitness activities on the go.

**Highlights:** Schedule stretching sessions, View session availability, Sign up for sessions, Make purchases, View studio location

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

**In-app purchases:** none


### Parabon CTX Study App

[App page](https://appshunter.io/ios/app/parabon-ctx-study-app/id6444806840)

**In-app purchases:** none


## Frequently asked questions

### Is Stretch U | free?

Stretch U | is free to download, with no in-app purchases.

### Is Parabon CTX Study App free?

Parabon CTX Study App is free to download, with no in-app purchases.

### Do Stretch U | or Parabon CTX Study App have ads?

Neither Stretch U | nor Parabon CTX Study App shows ads.

### Which is updated more often, Stretch U | or Parabon CTX Study App?

Stretch U | ships an update every 3 weeks, and Parabon CTX Study App every 3 weeks. Most recently, Stretch U | was updated on October 5, 2026 and Parabon CTX Study App on October 6, 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.*