# Hydration Tracker vs Ghost Runner G2

The clearest difference is in-app purchases: Ghost Runner G2 at none against Hydration Tracker's 5. Ghost Runner G2 also leads on ads (none vs shown). Hydration Tracker's advantage is update cadence (weekly vs every 5 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Hydration Tracker sells 5 in-app purchases, starting at $1.49 per 7 days. Ghost Runner G2 asks for nothing beyond the download.

Hydration Tracker ships an update weekly, Ghost Runner G2 every 5 months. The most recent releases landed on October 13, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Hydration Tracker | Ghost Runner G2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (25 ratings)](https://appshunter.io/ios/app/hydration-tracker-liquid-cats/id6744845359/reviews)** | — |
| Number of ratings | **25** | — |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 5 months |
| Monetization | Free with in-app purchases | — |
| Size | 30 MB | 5 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Nikita Zhukov](https://appshunter.io/developer/974791842) | [Atlas Codes LTD](https://appshunter.io/developer/1757136727) |

## What reviewers say

### Hydration Tracker

[App page](https://appshunter.io/ios/app/hydration-tracker-liquid-cats/id6744845359)

This gamified hydration tracker helps you build a healthy habit of drinking water regularly. It offers smart reminders, customizable goals based on your profile, and a collection of fun cat characters to keep you motivated. Track various beverages and view your progress with detailed logs and statistics.

**Highlights:** Gamified hydration tracking, Smart daily water reminders, Customizable goal calculator, Collection of cat characters, Log of 38 popular beverages, Detailed history and stats, Ad-free experience

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.49 | per 7 days |
| Monthly | $2.99 | per month |
| Annual | $8.99 | per year |
| Cats friend | Free | one-time |
| Lifetime | $17.99 | one-time |


### Ghost Runner G2

[App page](https://appshunter.io/ios/app/ghost-runner-g2/id6761507661)

**In-app purchases:** none


## Frequently asked questions

### Is Hydration Tracker free?

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

### Is Ghost Runner G2 free?

Ghost Runner G2 is free to download, with no in-app purchases.

### Do Hydration Tracker or Ghost Runner G2 have ads?

Hydration Tracker shows ads; Ghost Runner G2 does not.

### Which is updated more often, Hydration Tracker or Ghost Runner G2?

Hydration Tracker ships an update weekly, and Ghost Runner G2 every 5 months. Most recently, Hydration Tracker was updated on October 13, 2026 and Ghost Runner G2 on October 12, 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.*