# SmartCheckSLS vs Backpaper

The clearest difference is in-app purchases: SmartCheckSLS at none against Backpaper's 2. SmartCheckSLS also leads on ads (none vs shown). Backpaper's advantage is update cadence (every 5 days vs every 8 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Backpaper sells 2 in-app purchases, starting at $1.99 per month. SmartCheckSLS asks for nothing beyond the download.

SmartCheckSLS ships an update every 8 months, Backpaper every 5 days. The most recent releases landed on October 2, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | SmartCheckSLS | Backpaper |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Every 5 days** |
| Size | 108 MB | 49 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Industrial Augmented Reality S.L.](https://appshunter.io/developer/1574310834) | [Leandro Gartner](https://appshunter.io/developer/1270406368) |

## What reviewers say

### SmartCheckSLS

[App page](https://appshunter.io/ios/app/smartchecksls/id6443825301)

**Features:** macOS Compatibility

**In-app purchases:** none


### Backpaper

[App page](https://appshunter.io/ios/app/backpaper-wallpapers/id6456572371)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Suscripción Mensual | $1.99 | per month |
| Suscripción Anual | $6.99 | per year |


## Frequently asked questions

### Is SmartCheckSLS free?

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

### Is Backpaper free?

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

### Do SmartCheckSLS or Backpaper have ads?

Backpaper shows ads; SmartCheckSLS does not.

### Which is updated more often, SmartCheckSLS or Backpaper?

SmartCheckSLS ships an update every 8 months, and Backpaper every 5 days. Most recently, SmartCheckSLS was updated on October 2, 2026 and Backpaper on September 28, 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.*