# Tether vs Upswell Studio

The clearest difference is in-app purchases: Upswell Studio at none against Tether's 3. Upswell Studio also leads on update cadence (every 3 weeks vs every 2 months). Tether's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. Tether sells 3 in-app purchases, starting at $4.99 per month. Upswell Studio asks for nothing beyond the download.

Tether ships an update every 2 months, Upswell Studio every 3 weeks. The most recent releases landed on September 8, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Tether | Upswell Studio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/upswell-studio/id6762153076/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 39 MB | 37 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPod** | — |
| Age rating | 17+ | 4+ |
| Developer | [Zachary Lyons](https://appshunter.io/developer/1802738531) | [Upswell Studio, Inc.](https://appshunter.io/developer/1893148692) |

## What reviewers say

### Tether

[App page](https://appshunter.io/ios/app/tether-sensitivity-tracker/id6759925709)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tether Premium | $4.99 | per month |
| Tether Premium | $39.99 | per year |
| Tether Premium | $79.99 | one-time |


### Upswell Studio

[App page](https://appshunter.io/ios/app/upswell-studio/id6762153076)

Easily browse and purchase class packs or membership options. View the schedule, filter by class type, and manage your reservations to stay organized and committed to your fitness goals.

**Highlights:** Purchase class packs and memberships, Browse class schedule, Filter classes by type, Manage class reservations, Track upcoming classes

**In-app purchases:** none


## Frequently asked questions

### Is Tether free?

Tether is free to download, with in-app purchases available.

### Is Upswell Studio free?

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

### Which is updated more often, Tether or Upswell Studio?

Tether ships an update every 2 months, and Upswell Studio every 3 weeks. Most recently, Tether was updated on September 8, 2026 and Upswell Studio on September 11, 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.*