# Allergy Diary 3 vs Hydration Hero

The clearest difference is price: Hydration Hero at Free against Allergy Diary 3's $3.99. Allergy Diary 3's advantage is in-app purchases (none vs 6) and iOS requirement (11.0 vs 18.6). On ads and device support there is nothing between them.

Hydration Hero is free to download; Allergy Diary 3 costs $3.99 up front. Hydration Hero sells 5 in-app purchases, starting at $0.49 per 7 days. Allergy Diary 3 asks for nothing beyond the download.

## The numbers

| Metric | Allergy Diary 3 | Hydration Hero |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | — | **[4.9 (14 ratings)](https://appshunter.io/ios/app/hydration-herowater-reminder/id6572288673/reviews)** |
| Number of ratings | — | **14** |
| Positive reviews | — | 94.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 12 MB | 131 MB |
| Requires iOS | **11.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [cellHigh](https://appshunter.io/developer/380874052) | [Digital Sauce Pty Ltd](https://appshunter.io/developer/1759095998) |

## What reviewers say

### Allergy Diary 3

[App page](https://appshunter.io/ios/app/allergy-diary-3/id6463805258)

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

**In-app purchases:** none


### Hydration Hero

[App page](https://appshunter.io/ios/app/hydration-herowater-reminder/id6572288673)

This app transforms hydration into an engaging quest with a customizable avatar and smart tracking. It offers personalized goals, intelligent reminders, and community challenges to help you build healthy habits and celebrate progress.

**Highlights:** Customizable avatar that reacts to drinks, Smart tracking of various beverage hydration impact, Personalized water intake goals, Intelligent, customizable reminders, Streaks, badges, and challenges for motivation, Community and friend challenges

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $0.49 | per 7 days |
| Monthly Subscription | $1.99 | per month |
| Yearly Subscription | $14.99 | per year |
| Yearly Subscription | $19.99 | per year |
| Lifetime Subscription | $29.99 | one-time |


## Frequently asked questions

### Is Allergy Diary 3 free?

Allergy Diary 3 costs $3.99, with no in-app purchases.

### Is Hydration Hero free?

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

### Do Allergy Diary 3 or Hydration Hero have ads?

Neither Allergy Diary 3 nor Hydration Hero 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.*