# Tether vs Sjogrens Tracker

The clearest difference is device support: Sjogrens Tracker at 4 against Tether's 2. On price, ads, in-app purchases 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 and Sjogrens Tracker sells 10 in-app purchases, starting at $4.95 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Tether | Sjogrens Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Size | 39 MB | 202 MB |
| Requires iOS | **15.1** | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 17+ | 12+ |
| Developer | [Zachary Lyons](https://appshunter.io/developer/1802738531) | [Digital Therapeutics](https://appshunter.io/developer/1721663167) |

## 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 |


### Sjogrens Tracker

[App page](https://appshunter.io/ios/app/sjogrens-tracker/id6770044980)

**Features:** macOS Compatibility, Siri integration, Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flex Pass | $4.95 | per month |
| Sjogrens Tracker Weekly | $6.99 | per 7 days |
| monthly access | $9.99 | per month |
| Yearly Access | $24.99 | per year |
| smart pass | $29.99 | per month |
| premium sale | $29.99 | per year |
| yearly access | $39.99 | per year |
| yearly access | $59.99 | per year |
| Sjogrens Care Plan | $9.99 | one-time |
| Sjogrens Lifetime Upgrade | $149.99 | one-time |


## Frequently asked questions

### Is Tether free?

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

### Is Sjogrens Tracker free?

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

### Do Tether or Sjogrens Tracker have ads?

Neither Tether nor Sjogrens Tracker shows ads.

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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.*