# RepUp vs HydroSync

The clearest difference is in-app purchases: HydroSync at none against RepUp's 3. RepUp's advantage is ads (none vs shown) and update cadence (every 4 days vs every 3 months). On price, device support and iOS requirement there is nothing between them.

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

RepUp ships an update every 4 days, HydroSync every 3 months. The most recent releases landed on October 24, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | RepUp | HydroSync |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Every 3 months |
| Size | 149 MB | 37 MB |
| Requires iOS | **15.5** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Korea Analytics Technology](https://appshunter.io/developer/1645007311) | [MOBIPOTATO HK LIMITED](https://appshunter.io/developer/1470578867) |

## What reviewers say

### RepUp

[App page](https://appshunter.io/ios/app/repup-100-push-up-challenge/id6754883532)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Push-up Plus | $2.99 | per month |
| Push-up Plus | $24.99 | per year |
| Push-up Plus Lifetime | $59.99 | one-time |


### HydroSync

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RepUp free?

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

### Is HydroSync free?

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

### Do RepUp or HydroSync have ads?

HydroSync shows ads; RepUp does not.

### Which is updated more often, RepUp or HydroSync?

RepUp ships an update every 4 days, and HydroSync every 3 months. Most recently, RepUp was updated on October 24, 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.*