# StretchLab vs Optimize U

StretchLab and Optimize U 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.

StretchLab ships an update every 3 weeks, Optimize U every 5 weeks. The most recent releases landed on September 28, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | StretchLab | Optimize U |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (11K ratings)](https://appshunter.io/ios/app/stretchlab-live-long/id1484392665/reviews)** | — |
| Number of ratings | **11K** | — |
| Positive reviews | 48.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 152 MB | 62 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, Apple Watch | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [Xponential Fitness LLC](https://appshunter.io/developer/1442244332) | [EndoMedical Inc](https://appshunter.io/developer/1290814301) |

## What reviewers say

### StretchLab

[App page](https://appshunter.io/ios/app/stretchlab-live-long/id1484392665)

Discover personalized stretching sessions, from 1-on-1 to group classes, designed to improve flexibility and reduce tension. Book sessions, track your progress, and find studios near you. Enhance your overall health and wellness with expert guidance.

**Highlights:** Browse schedule of 1-on-1 and group stretches, Filter stretches by date and Flexologist, Book sessions and add to calendar, In-app activity tracker, Find nearby studios on interactive map, Track monthly membership, Check in to sessions

**Features:** Apple Watch app

**In-app purchases:** none

**What reviewers like**

- 👍 Excellent stretching experience
- 🙌 Knowledgeable and friendly staff
- 💪 Improved flexibility and mobility
- 🤩 Positive overall experience

**What reviewers complain about**

- 🐛 Buggy and unreliable app
- 💰 Expensive services
- 📞 Poor customer support and follow-up
- ⏰ Difficulty booking appointments

**Reported bugs**

- App crashes and errors when booking appointments
- Incorrect credit/session information displayed
- Password reset issues and invalid links
- Inability to log in or create an account

**Requested features**

- Ability to book appointments beyond current month
- Option to view password during login
- Improved app stability and functionality
- Integration with calendar apps


### Optimize U

[App page](https://appshunter.io/ios/app/optimize-u/id6575345918)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is StretchLab free?

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

### Is Optimize U free?

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

### Do StretchLab or Optimize U have ads?

Neither StretchLab nor Optimize U shows ads.

### Which is updated more often, StretchLab or Optimize U?

StretchLab ships an update every 3 weeks, and Optimize U every 5 weeks. Most recently, StretchLab was updated on September 28, 2026 and Optimize U on September 26, 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.*