# Fitness vs HydraFill

The clearest difference is ads: Fitness at none against HydraFill's shown. HydraFill's advantage is update cadence (every 2 days vs every 37 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Fitness ships an update every 37 months, HydraFill every 2 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Fitness | HydraFill |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hydrafill-hydration-tracker/id6790350987/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 37 months | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 30 MB | 102 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Instance IT Solutions](https://appshunter.io/developer/1378931704) | [Parthkumar Saliya](https://appshunter.io/developer/1895160511) |

## What reviewers say

### Fitness

[App page](https://appshunter.io/ios/app/fitness-7/id1477958073)

**In-app purchases:** none


### HydraFill

[App page](https://appshunter.io/ios/app/hydrafill-hydration-tracker/id6790350987)

Visualize your daily water intake with an animated body silhouette that fills up with each logged drink. Track various beverages, set personalized goals, and receive custom reminders to stay hydrated. Share your progress with engaging visualizations.

**Highlights:** Animated body visualization of hydration, Log 18+ drink types with custom icons, Set personalized daily hydration goals, Customizable drink reminders, Build daily streaks and earn badges, Sync with Apple Health, Track caffeine intake, Home screen widget for quick logging

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

**In-app purchases:** none


## Frequently asked questions

### Is Fitness free?

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

### Is HydraFill free?

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

### Do Fitness or HydraFill have ads?

HydraFill shows ads; Fitness does not.

### Which is updated more often, Fitness or HydraFill?

Fitness ships an update every 37 months, and HydraFill every 2 days. Most recently, Fitness was updated on November 3, 2026 and HydraFill on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*