# Everwell vs Tether

The clearest difference is device support: Everwell at 4 against Tether's 2. Everwell also leads on iOS requirement (11.0 vs 15.1). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Everwell sells 7 in-app purchases, starting at $9.99 per month and Tether sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Everwell | Tether |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Size | 83 MB | 39 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Everwell Software Inc.](https://appshunter.io/developer/1728675908) | [Zachary Lyons](https://appshunter.io/developer/1802738531) |

## What reviewers say

### Everwell

[App page](https://appshunter.io/ios/app/everwell-health-tracker/id6477316510)

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $9.99 | per month |
| Premium Access | $9.99 | per month |
| Premium Access | $59.99 | per year |
| Premium Access | $83.99 | per year |
| Premium Access | $95.99 | per year |
| Premium Access | $95.99 | per year |
| Premium Access | $119.99 | per year |


### 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 |


## Frequently asked questions

### Is Everwell free?

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

### Is Tether free?

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

### Do Everwell or Tether have ads?

Neither Everwell nor Tether 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.*