# Weight Loss Tracker vs Hydro Dots

The clearest difference is in-app purchases: Weight Loss Tracker at none against Hydro Dots's 4. Weight Loss Tracker also leads on iOS requirement (13.0 vs 26.0). Hydro Dots's advantage is update cadence (daily vs every 26 months). On price, ads and device support there is nothing between them.

Both are free to download. Hydro Dots sells 4 one-off in-app purchases. Weight Loss Tracker asks for nothing beyond the download.

Weight Loss Tracker ships an update every 26 months, Hydro Dots daily. The most recent releases landed on October 4, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Weight Loss Tracker | Hydro Dots |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 26 months | **Daily** |
| Size | 22 MB | 43 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ferran Espuna](https://appshunter.io/developer/1608027657) | [Kengo Tate](https://appshunter.io/developer/1458012620) |

## What reviewers say

### Weight Loss Tracker

[App page](https://appshunter.io/ios/app/weight-loss-tracker-bmi-log/id1608161020)

**Features:** macOS Compatibility

**In-app purchases:** none


### Hydro Dots

[App page](https://appshunter.io/ios/app/hydro-dots/id6794577673)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A drop | $0.99 | one-time |
| A glass | $2.99 | one-time |
| A bottle | $5.99 | one-time |
| Pro — Founding Member | $5.99 | one-time |


## Frequently asked questions

### Is Weight Loss Tracker free?

Weight Loss Tracker is free to download, with no in-app purchases.

### Is Hydro Dots free?

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

### Do Weight Loss Tracker or Hydro Dots have ads?

Both Weight Loss Tracker and Hydro Dots show ads.

### Which is updated more often, Weight Loss Tracker or Hydro Dots?

Weight Loss Tracker ships an update every 26 months, and Hydro Dots daily. Most recently, Weight Loss Tracker was updated on October 4, 2026 and Hydro Dots on October 11, 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.*