# Tether vs MyVitalSync

The clearest difference is update cadence: MyVitalSync at every 5 days against Tether's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Tether sells 3 in-app purchases, starting at $4.99 per month and MyVitalSync sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Tether ships an update every 2 months, MyVitalSync every 5 days. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Tether | MyVitalSync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/myvitalsync/id6761660908/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | — | Freemium |
| Size | 39 MB | 45 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Zachary Lyons](https://appshunter.io/developer/1802738531) | [Samvion Labs LLC](https://appshunter.io/developer/6802082251) |

## 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 |


### MyVitalSync

[App page](https://appshunter.io/ios/app/myvitalsync/id6761660908)

Transform your lab reports into a comprehensive health overview. This app uses AI to extract biomarkers, identify areas needing attention, and calculate your biological age and health score. Track trends, prepare for doctor visits, and manage family health profiles.

**Highlights:** AI biomarker extraction, Biological age calculation, Health score assessment, Trend tracking, Doctor preparation questions, Family health profiles, Apple Health integration

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Individual Monthly | $3.99 | per month |
| Family Monthly | $8.99 | per month |


## Frequently asked questions

### Is Tether free?

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

### Is MyVitalSync free?

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

### Do Tether or MyVitalSync have ads?

Neither Tether nor MyVitalSync shows ads.

### Which is updated more often, Tether or MyVitalSync?

Tether ships an update every 2 months, and MyVitalSync every 5 days. Most recently, Tether was updated on September 24, 2026 and MyVitalSync on September 22, 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.*