# Synology Drive vs VoltBook

The clearest difference is review sentiment: VoltBook at 100% against Synology Drive's 33%. VoltBook also leads on rating (5.0 vs 4.5) and update cadence (every 4 days vs every 3 months). Synology Drive's advantage is in-app purchases (none vs 2) and ratings volume (4.4K vs 1). On price, ads and device support there is nothing between them.

Both are free to download. VoltBook sells 2 in-app purchases, starting at $4.99 per month. Synology Drive asks for nothing beyond the download.

VoltBook holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Synology Drive has 4.4K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 33% of Synology Drive's written reviews are positive against 100% of VoltBook's.

Synology Drive ships an update every 3 months, VoltBook every 4 days. The most recent releases landed on October 27, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Synology Drive | VoltBook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (4.4K ratings)](https://appshunter.io/ios/app/synology-drive/id1267275421/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/voltbook/id6801197459/reviews)** |
| Number of ratings | **4.4K** | 1 |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | **Free** | Freemium |
| Size | 279 MB | 60 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Synology Inc.](https://appshunter.io/developer/321493109) | [Edward Anthony Whitfield](https://appshunter.io/developer/1836823655) |

## What reviewers say

### Synology Drive

[App page](https://appshunter.io/ios/app/synology-drive/id1267275421)

Access and manage files stored on your Synology NAS from your mobile device. This app allows you to view various file types, including office documents, and offers convenient file management features like syncing, searching, and sharing on the go.

**Highlights:** Access Synology NAS files on the go, View documents, spreadsheets, and slides, Sync files, Search files, Share files, Move and label files

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Fast and responsive
- 🔒 Secure private cloud
- 👍 Convenient remote access
- 🚀 Excellent integration with iOS Files app
- 👍 Great for photographers and mobile workers

**What reviewers complain about**

- 🐛 Frequent crashes and stability issues
- 🔋 High battery drain
- 👎 Unreliable sync and offline access
- 👎 Confusing and unintuitive user interface
- 🔍 Lacking search and organization features

**Reported bugs**

- Unable to log in with 2FA
- Sync tasks get stuck or fail
- Folders not showing content
- Incompatibility with latest iOS versions
- Duplicated files and folders after sync

**Requested features**

- Add support for offline folder sync
- Improve integration with iOS Files app
- Implement document editing capabilities
- Add option to customize file/folder naming
- Enhance audio/video playback features


### VoltBook

[App page](https://appshunter.io/ios/app/voltbook/id6801197459)

This app provides electricians with a comprehensive digital toolbox, featuring numerous electrical calculators, searchable code references, and job documentation tools. It offers offline functionality for all calculators and tables, with AI assistance for calculations and field notes.

**Highlights:** 75+ electrical calculators, Searchable NEC code references (2020, 2023, 2026), Offline functionality, AI Assistant for calculations and notes, Nameplate Scanner for equipment data, Job documentation and material lists (Pro)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $4.99 | per month |
| Pro Annual | $39.99 | per year |


## Frequently asked questions

### Is Synology Drive free?

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

### Is VoltBook free?

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

### Which has better reviews, Synology Drive or VoltBook?

VoltBook is rated higher. Synology Drive averages 4.5 out of 5 from 4.4K ratings, while VoltBook averages 5.0 from 1 ratings.

### Do Synology Drive or VoltBook have ads?

Neither Synology Drive nor VoltBook shows ads.

### Which is updated more often, Synology Drive or VoltBook?

Synology Drive ships an update every 3 months, and VoltBook every 4 days. Most recently, Synology Drive was updated on October 27, 2026 and VoltBook on October 8, 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.*