# ShelfSet vs K3D Reader

The clearest difference is in-app purchases: K3D Reader at none against ShelfSet's 4. K3D Reader also leads on update cadence (every 5 weeks vs every 4 months) and iOS requirement (11.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. ShelfSet sells 4 in-app purchases, starting at $19.99 per month. K3D Reader asks for nothing beyond the download.

ShelfSet ships an update every 4 months, K3D Reader every 5 weeks. The most recent releases landed on September 13, 2026 and December 24, 2025 respectively.

## The numbers

| Metric | ShelfSet | K3D Reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Size | 60 MB | 30 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [ShelfSet LLC](https://appshunter.io/developer/1511622298) | [Klee Group](https://appshunter.io/developer/449000568) |

## What reviewers say

### ShelfSet

[App page](https://appshunter.io/ios/app/shelfset/id1511622299)

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Monthly | $19.99 | per month |
| Pro Monthly | $79.99 | per month |
| Starter Annual | $199.99 | per year |
| Pro Annual | $799.99 | per year |


### K3D Reader

[App page](https://appshunter.io/ios/app/k3d-reader/id6633442261)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ShelfSet free?

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

### Is K3D Reader free?

K3D Reader is free to download, with no in-app purchases.

### Do ShelfSet or K3D Reader have ads?

Neither ShelfSet nor K3D Reader shows ads.

### Which is updated more often, ShelfSet or K3D Reader?

ShelfSet ships an update every 4 months, and K3D Reader every 5 weeks. Most recently, ShelfSet was updated on September 13, 2026 and K3D Reader on December 24, 2025.

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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.*