# Heliodose vs Hydration tracker2

The clearest difference is in-app purchases: Heliodose at none against Hydration tracker2's 1. Heliodose also leads on iOS requirement (15.1 vs 17.6). Hydration tracker2's advantage is update cadence (every 2 days vs every 5 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Hydration tracker2 sells 1 one-off in-app purchase. Heliodose asks for nothing beyond the download.

Heliodose ships an update every 5 weeks, Hydration tracker2 every 2 days. Both last shipped on October 11, 2026.

## The numbers

| Metric | Heliodose | Hydration tracker2 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 days** |
| Size | 24 MB | 66 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [Kliv Spahiu](https://appshunter.io/developer/1867066303) | [Paul Matthew](https://appshunter.io/developer/6782300193) |

## What reviewers say

### Heliodose

[App page](https://appshunter.io/ios/app/heliodose/id6761397845)

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

**In-app purchases:** none


### 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 Heliodose free?

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

### Is Hydration tracker2 free?

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

### Do Heliodose or Hydration tracker2 have ads?

Neither Heliodose nor Hydration tracker2 shows ads.

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

Heliodose ships an update every 5 weeks, and Hydration tracker2 every 2 days. Most recently, Heliodose was updated on October 11, 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.*