# 開業支援G21 vs JAN8 CS

The clearest difference is iOS requirement: JAN8 CS at 13.0 against 開業支援G21's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

開業支援G21 ships an update every 2 months, JAN8 CS every 6 weeks. The most recent releases landed on October 25, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | 開業支援G21 | JAN8 CS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Size | 5 MB | 180 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [株式会社ヨシダ](https://appshunter.io/developer/1417159527) | [JAN8](https://appshunter.io/developer/1579642116) |

## What reviewers say

### 開業支援G21

[App page](https://appshunter.io/ios/app/g21/id1424788384)

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

**In-app purchases:** none


### JAN8 CS

[App page](https://appshunter.io/ios/app/jan8-cs/id1579642024)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 開業支援G21 free?

開業支援G21 is free to download, with no in-app purchases.

### Is JAN8 CS free?

JAN8 CS is free to download, with no in-app purchases.

### Do 開業支援G21 or JAN8 CS have ads?

Neither 開業支援G21 nor JAN8 CS shows ads.

### Which is updated more often, 開業支援G21 or JAN8 CS?

開業支援G21 ships an update every 2 months, and JAN8 CS every 6 weeks. Most recently, 開業支援G21 was updated on October 25, 2026 and JAN8 CS 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.*