# Tether vs Immunally

The clearest difference is in-app purchases: Immunally at none against Tether's 3. Immunally also leads on update cadence (every 3 days vs every 2 months). On price, ads, device support 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. Immunally asks for nothing beyond the download.

Tether ships an update every 2 months, Immunally every 3 days. The most recent releases landed on September 24, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Tether | Immunally |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/immunally-autoimmune-tracker/id6787620519/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | — | Free |
| Size | 39 MB | 7 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Zachary Lyons](https://appshunter.io/developer/1802738531) | [Immunally LLC](https://appshunter.io/developer/6787620521) |

## 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 |


### Immunally

[App page](https://appshunter.io/ios/app/immunally-autoimmune-tracker/id6787620519)

Effortlessly track symptoms, meals, medications, and lab results for autoimmune conditions. Gain clear insights into patterns and triggers to better manage your health and prepare for doctor appointments.

**Highlights:** Log symptoms, meals, medications, and labs, Connect Apple Health for automatic data import, Analyze patterns and detect triggers, Run elimination experiments, Prepare for doctor appointments with data summaries, Private and secure health data

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

**In-app purchases:** none


## Frequently asked questions

### Is Tether free?

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

### Is Immunally free?

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

### Do Tether or Immunally have ads?

Neither Tether nor Immunally shows ads.

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

Tether ships an update every 2 months, and Immunally every 3 days. Most recently, Tether was updated on September 24, 2026 and Immunally on September 30, 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.*