# Hydrate vs Hydration tracker2

The clearest difference is update cadence: Hydration tracker2 at every 2 days against Hydrate's every 6 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Hydrate sells 3 in-app purchases, starting at $3.99 per month and Hydration tracker2 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Hydrate ships an update every 6 days, Hydration tracker2 every 2 days. The most recent releases landed on September 20, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Hydrate | Hydration tracker2 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 2 days** |
| Size | 22 MB | 66 MB |
| Requires iOS | 18.0 | **17.6** |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [ALEXANDER DAVID GRUINARD MACKENZIE](https://appshunter.io/developer/1886580061) | [Paul Matthew](https://appshunter.io/developer/6782300193) |

## What reviewers say

### Hydrate

[App page](https://appshunter.io/ios/app/hydrate-electrolyte-tracker/id6760869789)

**Features:** Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hydrate Pro — Monthly | $3.99 | per month |
| Hydrate Pro — Annual | $24.99 | per year |
| Lifetime Pro | $34.99 | one-time |


### Hydration tracker2

[App page](https://appshunter.io/ios/app/hydration-tracker2/id6782300191)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hydration Pro | $0.99 | one-time |


## Frequently asked questions

### Is Hydrate free?

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

### Is Hydration tracker2 free?

Hydration tracker2 is free to download, with in-app purchases available.

### Do Hydrate or Hydration tracker2 have ads?

Neither Hydrate nor Hydration tracker2 shows ads.

### Which is updated more often, Hydrate or Hydration tracker2?

Hydrate ships an update every 6 days, and Hydration tracker2 every 2 days. Most recently, Hydrate was updated on September 20, 2026 and Hydration tracker2 on October 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.*