# STL Viewer vs Shift Planner

The clearest difference is price: STL Viewer at Free against Shift Planner's $1.99. Shift Planner's advantage is update cadence (every 3 weeks vs every 43 months) and iOS requirement (13.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

STL Viewer is free to download; Shift Planner costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

STL Viewer ships an update every 43 months, Shift Planner every 3 weeks. The most recent releases landed on October 8, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | STL Viewer | Shift Planner |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 43 months | **Every 3 weeks** |
| Size | 4 MB | 25 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Felipe Marques de Barros](https://appshunter.io/developer/1459294806) | [Xiamen City Fanyou Network Technology Co., Ltd.](https://appshunter.io/developer/1842524161) |

## What reviewers say

### STL Viewer

[App page](https://appshunter.io/ios/app/stl-viewer/id6445801487)

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

**In-app purchases:** none


### Shift Planner

[App page](https://appshunter.io/ios/app/shift-planner-work-roster/id6772426831)

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

**In-app purchases:** none


## Frequently asked questions

### Is STL Viewer free?

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

### Is Shift Planner free?

Shift Planner costs $1.99, with no in-app purchases.

### Do STL Viewer or Shift Planner have ads?

Neither STL Viewer nor Shift Planner shows ads.

### Which is updated more often, STL Viewer or Shift Planner?

STL Viewer ships an update every 43 months, and Shift Planner every 3 weeks. Most recently, STL Viewer was updated on October 8, 2026 and Shift Planner on October 1, 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.*