# RAID Calculator vs 潤心充 (HK)

The clearest difference is update cadence: 潤心充 (HK) at monthly against RAID Calculator's every 9 months. 潤心充 (HK) also leads on iOS requirement (13.0 vs 26.0). 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.

RAID Calculator ships an update every 9 months, 潤心充 (HK) monthly. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | RAID Calculator | 潤心充 (HK) |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 42.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Monthly** |
| Monetization | Free | — |
| Size | 10 MB | 87 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Todd Greco](https://appshunter.io/developer/395601656) | [Winland Property Management Limited](https://appshunter.io/developer/1172203652) |

## What reviewers say

### RAID Calculator

[App page](https://appshunter.io/ios/app/raid-calculator/id395601653)

This app helps you plan NAS storage configurations and upgrades. It calculates usable space for various RAID levels and NAS systems, even with mixed drive sizes. Visualize drive layouts, compare systems, and learn about RAID configurations.

**Highlights:** Calculate usable space for mixed drive sizes, Supports Synology, Unraid, ZFS, SnapRAID, Btrfs, Visualize drive data, parity, and mirror copies, Compare different NAS systems side-by-side, Plan drive upgrades and see space gains, Learn about RAID levels and NAS system pros/cons

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

**In-app purchases:** none


### 潤心充 (HK)

[App page](https://appshunter.io/ios/app/hk/id6756920080)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RAID Calculator free?

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

### Is 潤心充 (HK) free?

潤心充 (HK) is free to download, with no in-app purchases.

### Do RAID Calculator or 潤心充 (HK) have ads?

Neither RAID Calculator nor 潤心充 (HK) shows ads.

### Which is updated more often, RAID Calculator or 潤心充 (HK)?

RAID Calculator ships an update every 9 months, and 潤心充 (HK) monthly. Most recently, RAID Calculator was updated on November 1, 2026 and 潤心充 (HK) on October 30, 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.*