# IoTシステム A･ISys vs シフト管理カレンダー

The clearest difference is update cadence: シフト管理カレンダー at every 2 weeks against IoTシステム A･ISys's every 7 months. シフト管理カレンダー also leads on iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

IoTシステム A･ISys ships an update every 7 months, シフト管理カレンダー every 2 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | IoTシステム A･ISys | シフト管理カレンダー |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Size | 53 MB | 33 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [ACTN K.K.](https://appshunter.io/developer/1519939443) | [Yoshiki Kanayama](https://appshunter.io/developer/1693902547) |

## What reviewers say

### IoTシステム A･ISys

[App page](https://appshunter.io/ios/app/iot-aisys/id1615943586)

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

**In-app purchases:** none


### シフト管理カレンダー

[App page](https://appshunter.io/ios/app/id6450722264)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IoTシステム A･ISys free?

IoTシステム A･ISys is free to download, with no in-app purchases.

### Is シフト管理カレンダー free?

シフト管理カレンダー is free to download, with no in-app purchases.

### Do IoTシステム A･ISys or シフト管理カレンダー have ads?

Neither IoTシステム A･ISys nor シフト管理カレンダー shows ads.

### Which is updated more often, IoTシステム A･ISys or シフト管理カレンダー?

IoTシステム A･ISys ships an update every 7 months, and シフト管理カレンダー every 2 weeks. Most recently, IoTシステム A･ISys was updated on November 3, 2026 and シフト管理カレンダー on November 3, 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.*