# NAS Pro vs 4DI

The clearest difference is in-app purchases: 4DI at none against NAS Pro's 10. 4DI also leads on update cadence (every 3 days vs every 3 weeks). NAS Pro's advantage is device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. NAS Pro sells 10 in-app purchases, starting at $2.49 per month. 4DI asks for nothing beyond the download.

NAS Pro ships an update every 3 weeks, 4DI every 3 days. The most recent releases landed on September 25, 2026 and August 30, 2026 respectively.

## The numbers

| Metric | NAS Pro | 4DI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (172 ratings)](https://appshunter.io/ios/app/nas-pro/id1435876433/reviews)** | — |
| Number of ratings | **172** | — |
| Positive reviews | 58.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 77 MB | 4 MB |
| Requires iOS | **18.0** | 18.6 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [EZV, spol. s r.o.](https://appshunter.io/developer/1274203159) | [Robert Poetzsch](https://appshunter.io/developer/1860642630) |

## What reviewers say

### NAS Pro

[App page](https://appshunter.io/ios/app/nas-pro/id1435876433)

Manage and monitor your Synology, QNAP, or TrueNAS server remotely. Control system health, storage, containers, virtual machines, backups, and downloads from your mobile device. Features Wake on LAN, Widgets, and Siri Shortcuts for convenient access.

**Highlights:** Remote NAS management, System health monitoring, Storage pool and volume management, Container and VM monitoring, Backup and download task management, Real-time network activity, Wake on LAN support

**Features:** Family Sharing, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Supporter Level - Monthly | $2.49 | per month |
| Supporter Level - Yearly | $18.49 | per year |
| System module | $1.99 | one-time |
| Network module | $1.99 | one-time |
| Storage module | $1.99 | one-time |
| Logs module | $1.99 | one-time |
| Tasks module | $1.99 | one-time |
| Docker Containers module | $1.99 | one-time |
| Download Station module | $1.99 | one-time |
| One Time - All Modules | $49.99 | one-time |

**What reviewers like**

- 🚀 Very good app for Synology
- 👍 Nice app
- 👍 Excellent app
- 👍 Great app
- 👍 Wonderful backup

**What reviewers complain about**

- 🔒 Subscription service required to use it
- 🐛 Giving up
- 🐛 Doesn't work at all
- 🐛 Probably the worse app ever
- 💰 Absurdly overpriced, a total non-starter

**Reported bugs**

- CPU usage meter not working in DSM7.1
- Some docker containers are not showing up on the list
- 2 factor authentication doesn't work properly
- Unable to remove demo server
- Home Screen Widget issue

**Requested features**

- Add OpenMediaVault NAS support
- Add Cloudflare's headers support
- Add Active Backup for Business module
- Show volume description in storage section
- Add basic VM support


### 4DI

[App page](https://appshunter.io/ios/app/4di-data-integrity-tool/id6760180866)

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

**In-app purchases:** none


## Frequently asked questions

### Is NAS Pro free?

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

### Is 4DI free?

4DI is free to download, with no in-app purchases.

### Do NAS Pro or 4DI have ads?

Neither NAS Pro nor 4DI shows ads.

### Which is updated more often, NAS Pro or 4DI?

NAS Pro ships an update every 3 weeks, and 4DI every 3 days. Most recently, NAS Pro was updated on September 25, 2026 and 4DI on August 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.*