# WellAge for Fitbit vs Hydrelle

The clearest difference is in-app purchases: WellAge for Fitbit at none against Hydrelle's 3. WellAge for Fitbit also leads on ads (none vs shown). Hydrelle's advantage is update cadence (every 3 weeks vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Hydrelle sells 3 in-app purchases, starting at $2.99 per month. WellAge for Fitbit asks for nothing beyond the download.

WellAge for Fitbit ships an update every 2 months, Hydrelle every 3 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | WellAge for Fitbit | Hydrelle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 180 MB | 85 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [MAKOTO KOMAZAWA](https://appshunter.io/developer/976896555) | [Tomohito Kii](https://appshunter.io/developer/1689523321) |

## What reviewers say

### WellAge for Fitbit

[App page](https://appshunter.io/ios/app/wellage-for-fitbit/id6738938946)

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

**In-app purchases:** none


### Hydrelle

[App page](https://appshunter.io/ios/app/hydrelle-water-tracker/id6761470806)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $2.99 | per month |
| Annual Premium | $14.99 | per year |
| Lifetime Premium | $29.99 | one-time |


## Frequently asked questions

### Is WellAge for Fitbit free?

WellAge for Fitbit is free to download, with no in-app purchases.

### Is Hydrelle free?

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

### Do WellAge for Fitbit or Hydrelle have ads?

Hydrelle shows ads; WellAge for Fitbit does not.

### Which is updated more often, WellAge for Fitbit or Hydrelle?

WellAge for Fitbit ships an update every 2 months, and Hydrelle every 3 weeks. Most recently, WellAge for Fitbit was updated on October 30, 2026 and Hydrelle on October 31, 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.*