# Strongbox Pro vs S3 Client

The clearest difference is price: S3 Client at Free against Strongbox Pro's $99.99. S3 Client also leads on update cadence (every 9 days vs every 2 weeks). Strongbox Pro's advantage is ratings volume (338 vs 54) and device support (5 vs 3). On rating, review sentiment, ads and in-app purchases there is nothing between them.

S3 Client is free to download; Strongbox Pro costs $99.99 up front. Strongbox Pro sells 7 in-app purchases, starting at $2.99 per month and S3 Client sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for Strongbox Pro against 4.8 for S3 Client. That said, the two scores are not equally well evidenced: Strongbox Pro has 338 ratings behind it against 54, so its average is the more settled of the two. Written reviews are what separate them: 86% of Strongbox Pro's written reviews are positive against 79% of S3 Client's.

Strongbox Pro ships an update every 2 weeks, S3 Client every 9 days. The most recent releases landed on September 29, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Strongbox Pro | S3 Client |
| --- | --- | --- |
| Price | $99.99 | **Free** |
| Rating | [4.7 (338 ratings)](https://appshunter.io/ios/app/strongbox-pro/id1481853033/reviews) | **[4.8 (54 ratings)](https://appshunter.io/ios/app/s3-client-files-location/id6447647340/reviews)** |
| Number of ratings | **338** | 54 |
| Positive reviews | **85.7% of reviews** | 79.1% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 136 MB | 63 MB |
| Requires iOS | **15.0** | 18.2 |
| Devices | **iPhone, iPad, iPod, Mac, Apple Watch** | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Phoebe Code Limited](https://appshunter.io/developer/897283734) | [Anders Borum ApS](https://appshunter.io/developer/1629010537) |

## What reviewers say

### Strongbox Pro

[App page](https://appshunter.io/ios/app/strongbox-pro/id1481853033)

Securely store and protect all your passwords with one master password. Supports open-source formats and offers advanced security features like biometric unlock, hardware token protection, and cloud syncing.

**Highlights:** Master password protection, Biometric unlock (Face ID/Touch ID), Passkey and YubiKey support, Military-grade encryption, Cloud sync (iCloud, Dropbox, etc.), Password auditing (weak passwords, HIBP check), Secure password generation

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Tip | $2.99 | per month |
| Annual Tip | $19.99 | per year |
| Little Tip | $4.99 | one-time |
| Small Tip | $9.99 | one-time |
| Medium Tip | $19.99 | one-time |
| Large Tip | $99.99 | one-time |
| Huge Tip | $199.99 | one-time |


### S3 Client

[App page](https://appshunter.io/ios/app/s3-client-files-location/id6447647340)

Access and manage your S3-compatible cloud storage directly from your device's file system. Files are downloaded on demand and synchronized automatically, with support for various S3 services and encryption methods.

**Highlights:** Direct S3 storage access, On-demand file downloading, Automatic synchronization, Support for multiple S3 services, System share sheet uploads, Pre-signed sharing link generation, Shortcuts automation support

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| S3 Files Pro Monthly | $2.99 | per month |
| Lifetime S3 Pro | $14.99 | one-time |
| Lifetime S3 Pro | $17.99 | one-time |

**What reviewers like**

- 👍 Intuitive UI/UX
- 🔄 Universal setup across devices
- 🚀 Smooth and fast performance
- 💡 Excellent integration with Files app
- 🛠️ Handles edge cases and retries well

**What reviewers complain about**

- 🤔 Not intuitive for some
- 💰 Limited free features
- 🐛 Clunky to use
- 🐛 App constantly pauses
- 🐛 No obvious way to unpause

**Reported bugs**

- Files renamed randomly
- High CPU usage
- Stopped working in iOS 26
- Can't set permissions
- Fails to load S3 buckets properly

**Requested features**

- Support for WebDAV servers
- Support for Google OAuth for GCS
- Synchronous feature to backup photos automatically
- Configurable AWS endpoint for non-.com endpoints
- Allow import/export of configuration


## Frequently asked questions

### Is Strongbox Pro free?

Strongbox Pro costs $99.99, and also offers in-app purchases.

### Is S3 Client free?

S3 Client is free to download, with in-app purchases available.

### Which has better reviews, Strongbox Pro or S3 Client?

S3 Client is rated higher. Strongbox Pro averages 4.7 out of 5 from 338 ratings, while S3 Client averages 4.8 from 54 ratings.

### Do Strongbox Pro or S3 Client have ads?

Neither Strongbox Pro nor S3 Client shows ads.

### Which is updated more often, Strongbox Pro or S3 Client?

Strongbox Pro ships an update every 2 weeks, and S3 Client every 9 days. Most recently, Strongbox Pro was updated on September 29, 2026 and S3 Client on September 26, 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.*