# Weight Stats vs HydroSync

The clearest difference is in-app purchases: HydroSync at none against Weight Stats's 1. Weight Stats's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Weight Stats sells 1 one-off in-app purchase. HydroSync asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 16, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Weight Stats | HydroSync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (13 ratings)](https://appshunter.io/ios/app/weight-stats/id6446096079/reviews)** | — |
| Number of ratings | **13** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 37 MB |
| Requires iOS | **15.4** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Codulis](https://appshunter.io/developer/335542761) | [MOBIPOTATO HK LIMITED](https://appshunter.io/developer/1470578867) |

## What reviewers say

### Weight Stats

[App page](https://appshunter.io/ios/app/weight-stats/id6446096079)

Track your weight loss journey with a visually appealing, color-coded chart and goal line. Add notes for comments and utilize rolling averages to monitor progress. Supports both kilograms and pounds, and integrates with Apple Health.

**Highlights:** Color-coded progress chart, Goal line visualization, Rolling average curve, Comment notepad, Kilograms and pounds support, Apple Health integration

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weight Stats Premium | $9.99 | one-time |


### HydroSync

[App page](https://appshunter.io/ios/app/hydrosync-water/id6756297025)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Weight Stats free?

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

### Is HydroSync free?

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

### Do Weight Stats or HydroSync have ads?

HydroSync shows ads; Weight Stats does not.

### Which is updated more often, Weight Stats or HydroSync?

Weight Stats ships an update every 3 months, and HydroSync every 3 months. Most recently, Weight Stats was updated on October 16, 2026 and HydroSync on October 2, 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.*