# Hydration Hero vs Curls AI

The clearest difference is update cadence: Curls AI at every 5 days against Hydration Hero's monthly. Curls AI also leads on iOS requirement (16.4 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Hydration Hero sells 5 in-app purchases, starting at $0.49 per 7 days and Curls AI sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Hydration Hero ships an update monthly, Curls AI every 5 days. The most recent releases landed on November 8, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Hydration Hero | Curls AI |
| --- | --- | --- |
| Price | Free | 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 | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 134 MB | 44 MB |
| Requires iOS | 18.6 | **16.4** |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Digital Sauce Pty Ltd](https://appshunter.io/developer/1759095998) | [SABR LABS LTD](https://appshunter.io/developer/1863734513) |

## What reviewers say

### 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 that reacts to your drinks. It intelligently tracks various beverages, offers smart reminders, and allows you to set personalized goals, conquer challenges, and connect with friends for motivation.

**Highlights:** Customizable avatar that reacts to drinks, Smart tracking of various beverage hydration impacts, Personalized daily hydration goals, Intelligent reminders, Streaks, badges, and challenges for motivation, Community features 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 |


### Curls AI

[App page](https://appshunter.io/ios/app/curls-ai/id6780203648)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Curls AI yearly | $29.99 | one-time |


## Frequently asked questions

### Is Hydration Hero free?

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

### Is Curls AI free?

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

### Do Hydration Hero or Curls AI have ads?

Neither Hydration Hero nor Curls AI shows ads.

### Which is updated more often, Hydration Hero or Curls AI?

Hydration Hero ships an update monthly, and Curls AI every 5 days. Most recently, Hydration Hero was updated on November 8, 2026 and Curls AI on October 28, 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.*