# PlainShogiBoard / Plain将棋盤 vs 7seg Invader

The clearest difference is in-app purchases: 7seg Invader at none against PlainShogiBoard / Plain将棋盤's 1. PlainShogiBoard / Plain将棋盤's advantage is update cadence (every 2 months vs every 5 months) and device support (6 vs 2). On price and ads there is nothing between them.

Both are free to download. PlainShogiBoard / Plain将棋盤 sells 1 one-off in-app purchase. 7seg Invader asks for nothing beyond the download.

PlainShogiBoard / Plain将棋盤 ships an update every 2 months, 7seg Invader every 5 months. The most recent releases landed on September 25, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | PlainShogiBoard / Plain将棋盤 | 7seg Invader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Size | 7 MB | 1 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | **iPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Ryo Yamashita](https://appshunter.io/developer/1347562710) | [Kiyoshi Izumi](https://appshunter.io/developer/1807085294) |

## What reviewers say

### PlainShogiBoard / Plain将棋盤

[App page](https://appshunter.io/ios/app/plainshogiboard-plain/id1620268476)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hide AD | $1.99 | one-time |


### 7seg Invader

[App page](https://appshunter.io/ios/app/7seg-invader/id6744325035)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is PlainShogiBoard / Plain将棋盤 free?

PlainShogiBoard / Plain将棋盤 is free to download, with in-app purchases available.

### Is 7seg Invader free?

7seg Invader is free to download, with no in-app purchases.

### Do PlainShogiBoard / Plain将棋盤 or 7seg Invader have ads?

Neither PlainShogiBoard / Plain将棋盤 nor 7seg Invader shows ads.

### Which is updated more often, PlainShogiBoard / Plain将棋盤 or 7seg Invader?

PlainShogiBoard / Plain将棋盤 ships an update every 2 months, and 7seg Invader every 5 months. Most recently, PlainShogiBoard / Plain将棋盤 was updated on September 25, 2026 and 7seg Invader on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*