# HydroX vs Stackup

The clearest difference is update cadence: Stackup at every 4 days against HydroX's every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.

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

HydroX ships an update every 6 weeks, Stackup every 4 days. The most recent releases landed on October 6, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | HydroX | Stackup |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 4 days** |
| Size | 32 MB | 155 MB |
| Requires iOS | **15.1** | 15.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HYDROGEN PAYMENT SERVICES COMPANY LIMITED](https://appshunter.io/developer/1691861531) | [Stackup Technology Limited](https://appshunter.io/developer/6797650460) |

## What reviewers say

### HydroX

[App page](https://appshunter.io/ios/app/hydrox/id6479891627)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stackup

[App page](https://appshunter.io/ios/app/stackup-payments-and-gifts/id6797650458)

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

**In-app purchases:** none


## Frequently asked questions

### Is HydroX free?

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

### Is Stackup free?

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

### Do HydroX or Stackup have ads?

Neither HydroX nor Stackup shows ads.

### Which is updated more often, HydroX or Stackup?

HydroX ships an update every 6 weeks, and Stackup every 4 days. Most recently, HydroX was updated on October 6, 2026 and Stackup on October 17, 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.*