# Proton Drive vs CISA Smart Access

The clearest difference is in-app purchases: CISA Smart Access at none against Proton Drive's 9. CISA Smart Access also leads on iOS requirement (14.0 vs 16.0). Proton Drive's advantage is update cadence (fortnightly vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Proton Drive sells 9 in-app purchases, starting at $0.99 per month. CISA Smart Access asks for nothing beyond the download.

Proton Drive ships an update fortnightly, CISA Smart Access every 3 months. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Proton Drive | CISA Smart Access |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (1.3K ratings)](https://appshunter.io/ios/app/proton-drive-cloud-storage/id1509667851/reviews)** | — |
| Number of ratings | **1.3K** | — |
| Positive reviews | 37.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 235 MB | 28 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Proton AG](https://appshunter.io/developer/979659484) | [CISA S.p.A.](https://appshunter.io/developer/1561726091) |

## What reviewers say

### Proton Drive

[App page](https://appshunter.io/ios/app/proton-drive-cloud-storage/id1509667851)

Securely store and back up your files and photos with end-to-end encryption. Access your content across devices, share securely with password protection, and enjoy peace of mind with Swiss privacy laws. Offers free storage with upgrade options.

**Highlights:** End-to-end encrypted storage, Automatic photo and video backup, Secure link sharing with passwords, PIN/biometric protection, Offline file access, File version history

**Features:** Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Drive Lite 1 month | $0.99 | per month |
| Drive Plus 1 month | $4.99 | per month |
| Drive Plus 1 TB (1 month) | $9.99 | per month |
| Proton Unlimited 1 month | $14.99 | per month |
| Drive Plus 1 year | $47.90 | per year |
| Drive Plus 1 TB (1 year) | $95.99 | per year |
| Proton Unlimited 1 year | $119.00 | per year |
| Drive Plus | $59.99 | one-time |
| Proton Unlimited | $149.99 | one-time |

**What reviewers like**

- 🚀 Fast and efficient
- 🔒 Secure and private
- 👍 Simple and intuitive UI
- 💡 Integrated with iOS Files app

**What reviewers complain about**

- 🐛 Buggy and unreliable
- 🔋 High battery consumption
- 📥 Slow upload/download speeds
- 🗂️ Lacking key features like search and sorting

**Reported bugs**

- Frequent crashes and errors
- Inconsistent file syncing across devices
- Unable to access files uploaded from desktop
- Issues with offline file access

**Requested features**

- Automatic photo/video backup
- Ability to edit documents within the app
- Seamless integration with other apps for file sharing
- Linux desktop client


### CISA Smart Access

[App page](https://appshunter.io/ios/app/cisa-smart-access/id1561726089)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Proton Drive free?

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

### Is CISA Smart Access free?

CISA Smart Access is free to download, with no in-app purchases.

### Do Proton Drive or CISA Smart Access have ads?

Neither Proton Drive nor CISA Smart Access shows ads.

### Which is updated more often, Proton Drive or CISA Smart Access?

Proton Drive ships an update fortnightly, and CISA Smart Access every 3 months. Most recently, Proton Drive was updated on October 28, 2026 and CISA Smart Access on October 25, 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.*