# JOSLITZ vs Penguin Launch

The clearest difference is in-app purchases: Penguin Launch at none against JOSLITZ's 1. Penguin Launch also leads on update cadence (daily vs every 9 months). JOSLITZ's advantage is iOS requirement (15.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. JOSLITZ sells 1 one-off in-app purchase. Penguin Launch asks for nothing beyond the download.

JOSLITZ ships an update every 9 months, Penguin Launch daily. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | JOSLITZ | Penguin Launch |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 months | **Daily** |
| Size | 3 MB | 36 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Masayuki Ishizuka](https://appshunter.io/developer/330537039) | [Yarra Park Pty Ltd](https://appshunter.io/developer/1856165981) |

## What reviewers say

### JOSLITZ

[App page](https://appshunter.io/ios/app/joslitz/id6472687919)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Neon Block | $0.99 | one-time |


### Penguin Launch

[App page](https://appshunter.io/ios/app/penguin-launch-physics-puzzle/id6818445793)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is JOSLITZ free?

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

### Is Penguin Launch free?

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

### Do JOSLITZ or Penguin Launch have ads?

Neither JOSLITZ nor Penguin Launch shows ads.

### Which is updated more often, JOSLITZ or Penguin Launch?

JOSLITZ ships an update every 9 months, and Penguin Launch daily. Most recently, JOSLITZ was updated on October 30, 2026 and Penguin Launch on October 29, 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.*