# Shift Calendar Alarm vs ShiftProCalendar

The clearest difference is update cadence: Shift Calendar Alarm at fortnightly against ShiftProCalendar's every 2 months. ShiftProCalendar's advantage is device support (3 vs 1) and iOS requirement (17.6 vs 26.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Shift Calendar Alarm sells 2 in-app purchases, starting at $0.99 per month and ShiftProCalendar sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Shift Calendar Alarm ships an update fortnightly, ShiftProCalendar every 2 months. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Shift Calendar Alarm | ShiftProCalendar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Size | 6 MB | 20 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [PING CHANG YU](https://appshunter.io/developer/1884515149) | [LI JUNYI](https://appshunter.io/developer/1863692375) |

## What reviewers say

### Shift Calendar Alarm

[App page](https://appshunter.io/ios/app/shift-calendar-alarm/id6760447926)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shift Alarm Premium Monthly | $0.99 | per month |
| Shift Alarm Premium Yearly | $8.99 | per year |


### ShiftProCalendar

[App page](https://appshunter.io/ios/app/shiftprocalendar/id6761934926)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $0.99 | per month |
| Pro Lifetime Access | $29.99 | one-time |


## Frequently asked questions

### Is Shift Calendar Alarm free?

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

### Is ShiftProCalendar free?

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

### Do Shift Calendar Alarm or ShiftProCalendar have ads?

Neither Shift Calendar Alarm nor ShiftProCalendar shows ads.

### Which is updated more often, Shift Calendar Alarm or ShiftProCalendar?

Shift Calendar Alarm ships an update fortnightly, and ShiftProCalendar every 2 months. Most recently, Shift Calendar Alarm was updated on October 31, 2026 and ShiftProCalendar on October 24, 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.*