# Wittgenstein vs Root Locus Plotter

The clearest difference is in-app purchases: Root Locus Plotter at none against Wittgenstein's 1. Root Locus Plotter also leads on update cadence (every 3 months vs every 8 months) and iOS requirement (15.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Wittgenstein sells 1 one-off in-app purchase. Root Locus Plotter asks for nothing beyond the download.

Wittgenstein ships an update every 8 months, Root Locus Plotter every 3 months. The most recent releases landed on October 10, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Wittgenstein | Root Locus Plotter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 months** |
| Size | 3 MB | 30 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [Sthefano Schiavon](https://appshunter.io/developer/1882733645) |

## What reviewers say

### Wittgenstein

[App page](https://appshunter.io/ios/app/wittgenstein/id6751452422)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Sentences | $4.99 | one-time |


### Root Locus Plotter

[App page](https://appshunter.io/ios/app/root-locus-plotter/id6760122394)

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

**In-app purchases:** none


## Frequently asked questions

### Is Wittgenstein free?

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

### Is Root Locus Plotter free?

Root Locus Plotter is free to download, with no in-app purchases.

### Do Wittgenstein or Root Locus Plotter have ads?

Neither Wittgenstein nor Root Locus Plotter shows ads.

### Which is updated more often, Wittgenstein or Root Locus Plotter?

Wittgenstein ships an update every 8 months, and Root Locus Plotter every 3 months. Most recently, Wittgenstein was updated on October 10, 2026 and Root Locus Plotter on October 3, 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.*