# IWOS vs Shift Calendar

The clearest difference is in-app purchases: IWOS at none against Shift Calendar's 1. Shift Calendar's advantage is update cadence (monthly vs every 3 months) and iOS requirement (12.0 vs 14.0). On price, ads and device support there is nothing between them.

Both are free to download. Shift Calendar sells 1 one-off in-app purchase. IWOS asks for nothing beyond the download.

IWOS ships an update every 3 months, Shift Calendar monthly. The most recent releases landed on September 10, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | IWOS | Shift Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/shift-calendar-auto-schedule/id6476062772/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | — | Free with in-app purchases |
| Size | 42 MB | 35 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Beijing Inhand Networks Technology co.,Ltd.](https://appshunter.io/developer/972533730) | [晨 房](https://appshunter.io/developer/1683285100) |

## What reviewers say

### IWOS

[App page](https://appshunter.io/ios/app/iwos/id1459213546)

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

**In-app purchases:** none


### Shift Calendar

[App page](https://appshunter.io/ios/app/shift-calendar-auto-schedule/id6476062772)

This calendar app is designed for shift workers, offering automatic calculation of time off for work cycles. It also includes additional tools specifically for managing shift-related schedules.

**Highlights:** Shift worker focus, Automatic time off calculation, Work cycle scheduling, Shift-related tools

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shift Calendar Premium | $9.99 | one-time |


## Frequently asked questions

### Is IWOS free?

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

### Is Shift Calendar free?

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

### Do IWOS or Shift Calendar have ads?

Neither IWOS nor Shift Calendar shows ads.

### Which is updated more often, IWOS or Shift Calendar?

IWOS ships an update every 3 months, and Shift Calendar monthly. Most recently, IWOS was updated on September 10, 2026 and Shift Calendar on June 4, 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.*