# Partial Difference Subtraction vs Map Burger Japan

The clearest difference is price: Map Burger Japan at Free against Partial Difference Subtraction's $3.99. Map Burger Japan also leads on update cadence (every 2 months vs every 9 months) and iOS requirement (12.1 vs 17.6). Partial Difference Subtraction's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Map Burger Japan is free to download; Partial Difference Subtraction costs $3.99 up front. Map Burger Japan sells 1 one-off in-app purchase. Partial Difference Subtraction asks for nothing beyond the download.

Partial Difference Subtraction ships an update every 9 months, Map Burger Japan every 2 months. The most recent releases landed on October 8, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Partial Difference Subtraction | Map Burger Japan |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/map-burger-japan/id673209738/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | — | Ad-supported |
| Size | 1 MB | 32 MB |
| Requires iOS | 17.6 | **12.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Esa Helttula](https://appshunter.io/developer/339440196) | [HIKARI NAKASHIMA](https://appshunter.io/developer/646350940) |

## What reviewers say

### Partial Difference Subtraction

[App page](https://appshunter.io/ios/app/partial-difference-subtraction/id351023078)

**Features:** macOS Compatibility

**In-app purchases:** none


### Map Burger Japan

[App page](https://appshunter.io/ios/app/map-burger-japan/id673209738)

Learn the geography of Japan through a fun quiz game. Correctly answer questions to build a burger and complete the map of Japan. An ad-supported free version is available, with a paid ad-free option.

**Highlights:** Learn Japanese prefectures, Quiz-based learning, Burger building game mechanic, Map completion challenge, Free to play with ads

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| To hide ad | $2.99 | one-time |


## Frequently asked questions

### Is Partial Difference Subtraction free?

Partial Difference Subtraction costs $3.99, with no in-app purchases.

### Is Map Burger Japan free?

Map Burger Japan is free to download, with in-app purchases available.

### Do Partial Difference Subtraction or Map Burger Japan have ads?

Map Burger Japan shows ads; Partial Difference Subtraction does not.

### Which is updated more often, Partial Difference Subtraction or Map Burger Japan?

Partial Difference Subtraction ships an update every 9 months, and Map Burger Japan every 2 months. Most recently, Partial Difference Subtraction was updated on October 8, 2026 and Map Burger Japan on October 19, 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.*