# STACK Storage vs Correctbook App

The clearest difference is update cadence: STACK Storage at every 3 weeks against Correctbook App's every 9 months. STACK Storage also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

STACK Storage ships an update every 3 weeks, Correctbook App every 9 months. The most recent releases landed on September 9, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | STACK Storage | Correctbook App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/stack-storage/id985218254/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 9 months |
| Monetization | Free | — |
| Size | 23 MB | 30 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [TransIP BV](https://appshunter.io/developer/325181787) | [Correctbook](https://appshunter.io/developer/1691849771) |

## What reviewers say

### STACK Storage

[App page](https://appshunter.io/ios/app/stack-storage/id985218254)

Securely store, access, and share your files from any device. Automatically back up photos and videos, and share links or files directly with others. Offers password protection for added security.

**Highlights:** Secure online storage, Access files from any device, Share files and download links, Automatic photo and video upload, Password protection, 256-bit encryption

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

**In-app purchases:** none


### Correctbook App

[App page](https://appshunter.io/ios/app/correctbook-app/id6450104369)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is STACK Storage free?

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

### Is Correctbook App free?

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

### Do STACK Storage or Correctbook App have ads?

Neither STACK Storage nor Correctbook App shows ads.

### Which is updated more often, STACK Storage or Correctbook App?

STACK Storage ships an update every 3 weeks, and Correctbook App every 9 months. Most recently, STACK Storage was updated on September 9, 2026 and Correctbook App on September 11, 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.*