# C137 vs Sophon

The clearest difference is in-app purchases: C137 at none against Sophon's 12. Sophon's advantage is iOS requirement (15.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Sophon sells 12 in-app purchases, starting at $6.99 per month. C137 asks for nothing beyond the download.

C137 ships an update every 5 days, Sophon every 9 days. The most recent releases landed on October 5, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | C137 | Sophon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.1 (74 ratings)](https://appshunter.io/ios/app/sophon-secure-cloud-storage/id6738370584/reviews)** |
| Number of ratings | — | **74** |
| Positive reviews | — | 28.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 9 days |
| Monetization | — | Free with in-app purchases |
| Size | 39 MB | 193 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Emmanuel Bordon](https://appshunter.io/developer/1774611734) | [New Sophon Technology Limited](https://appshunter.io/developer/1780457092) |

## What reviewers say

### C137

[App page](https://appshunter.io/ios/app/c137-aesthetic-widget/id6737089692)

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

**In-app purchases:** none


### Sophon

[App page](https://appshunter.io/ios/app/sophon-secure-cloud-storage/id6738370584)

Securely store, transfer, and share files with 6GB of free cloud storage. Access your data from any device, organize files efficiently, and enjoy features like online browsing and encrypted sharing. It also offers business-oriented tools for document conversion and OCR.

**Highlights:** 6GB free secure cloud storage, Unlimited file transfer, File classification and management, Access from any device, Online photo browsing and video playback, Encrypted file sharing, Document conversion and OCR

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| monthly subscription | $6.99 | per month |
| Weekly Subscription | $6.99 | per 7 days |
| Weekly Subscription | $6.99 | per 7 days |
| Weekly Subscription | $6.99 | per 7 days |
| Weekly | $6.99 | per 7 days |
| Weekly Subscription | $9.99 | per 7 days |
| Monthly subscription | $12.99 | per month |
| Monthly Subscription | $12.99 | per month |
| Monthly | $12.99 | per month |
| monthly subscription | $19.99 | per month |
| Annual Subscription | $79.99 | per year |
| Annually | $79.99 | per year |


## Frequently asked questions

### Is C137 free?

C137 is free to download, with no in-app purchases.

### Is Sophon free?

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

### Do C137 or Sophon have ads?

Neither C137 nor Sophon shows ads.

### Which is updated more often, C137 or Sophon?

C137 ships an update every 5 days, and Sophon every 9 days. Most recently, C137 was updated on October 5, 2026 and Sophon on October 20, 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.*