# FK Trend vs Hydrify

The clearest difference is in-app purchases: FK Trend at none against Hydrify's 3. FK Trend also leads on iOS requirement (13.4 vs 16.0). Hydrify's advantage is update cadence (weekly vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. Hydrify sells 3 in-app purchases, starting at $1.99 per month. FK Trend asks for nothing beyond the download.

FK Trend ships an update monthly, Hydrify weekly. The most recent releases landed on October 15, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | FK Trend | Hydrify |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/hydrify-water-tracker/id6746819381/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | — | Freemium |
| Size | 29 MB | 125 MB |
| Requires iOS | **13.4** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Fitbase](https://appshunter.io/developer/1530906929) | [Emrah Korkmaz](https://appshunter.io/developer/1485564066) |

## What reviewers say

### FK Trend

[App page](https://appshunter.io/ios/app/fk-trend/id1616737525)

**Features:** macOS Compatibility

**In-app purchases:** none


### Hydrify

[App page](https://appshunter.io/ios/app/hydrify-water-tracker/id6746819381)

This AI-powered app tracks your water intake and connects it to your mood, energy, and skin health. It offers intelligent face detection, interactive widgets, and smart reminders to help you build healthy hydration habits and visualize your progress.

**Highlights:** AI-powered hydration tracking, Mood and face scan integration, Interactive home screen widgets, Customizable smart reminders, Year in Pixels historical visualization, Detailed AI-driven insights

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Membership | $1.99 | per month |
| Annual Premium Membership | $17.99 | per year |
| Annual Premium Membership | $19.99 | per year |


## Frequently asked questions

### Is FK Trend free?

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

### Is Hydrify free?

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

### Do FK Trend or Hydrify have ads?

Neither FK Trend nor Hydrify shows ads.

### Which is updated more often, FK Trend or Hydrify?

FK Trend ships an update monthly, and Hydrify weekly. Most recently, FK Trend was updated on October 15, 2026 and Hydrify on October 6, 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.*