# Wittgenstein vs Rondo

The clearest difference is update cadence: Rondo at every 3 days against Wittgenstein's every 8 months. Wittgenstein's advantage is iOS requirement (17.6 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Wittgenstein sells 1 one-off in-app purchase and Rondo sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Wittgenstein ships an update every 8 months, Rondo every 3 days. The most recent releases landed on October 10, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Wittgenstein | Rondo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rondo-prime-factorization/id6784029039/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 days** |
| Monetization | — | Free with in-app purchases |
| Size | 3 MB | 11 MB |
| Requires iOS | **17.6** | 26.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [KEN TOMINAGA](https://appshunter.io/developer/975026926) |

## 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 |


### Rondo

[App page](https://appshunter.io/ios/app/rondo-prime-factorization/id6784029039)

Explore the mathematical beauty of numbers through interactive, animated factorization diagrams. Watch numbers dance, hear their unique songs, and even visualize them in augmented reality. Discover the stories behind special numbers and personalize your experience with customizable palettes and sounds.

**Highlights:** Animated factorization diagrams, Augmented reality number visualization, Auditory representation of factors, Interactive number exploration, Field Guide for special numbers, Home screen and Apple Watch widgets, Customizable color palettes and sounds

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip a prime · 199 | $1.99 | one-time |
| Tip a prime · 499 | $4.99 | one-time |
| Rondo Pro | $4.99 | one-time |
| Tip a prime · 599 | $5.99 | one-time |
| Tip a prime · 1999 | $19.99 | one-time |


## Frequently asked questions

### Is Wittgenstein free?

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

### Is Rondo free?

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

### Do Wittgenstein or Rondo have ads?

Neither Wittgenstein nor Rondo shows ads.

### Which is updated more often, Wittgenstein or Rondo?

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