# Stacked vs SD Backup

Stacked and SD Backup are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | Stacked | SD Backup |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 days | — |
| Size | 15 MB | 16 MB |
| Requires iOS | 26.0 | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Pull Apps](https://appshunter.io/developer/1828384931) | [小祯 汪](https://appshunter.io/developer/1164848834) |

## What reviewers say

### Stacked

[App page](https://appshunter.io/ios/app/stacked-batch-pdf-scanner/id6761432682)

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

**In-app purchases:** none


### SD Backup

[App page](https://appshunter.io/ios/app/sd-backup-nas-and-sftp/id6806176361)

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

**In-app purchases:** none


## Frequently asked questions

### Is Stacked free?

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

### Is SD Backup free?

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

### Do Stacked or SD Backup have ads?

Neither Stacked nor SD Backup shows ads.

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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.*