# FourScan vs Shift Pocket Calendar

The clearest difference is in-app purchases: FourScan at none against Shift Pocket Calendar's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Shift Pocket Calendar sells 1 in-app purchase, starting at $4.99 per month. FourScan asks for nothing beyond the download.

FourScan ships an update every 5 days, Shift Pocket Calendar weekly. The most recent releases landed on November 9, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | FourScan | Shift Pocket Calendar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Weekly |
| Size | 3 MB | 2 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 9+ |
| Developer | [satoshi amasaki](https://appshunter.io/developer/1891268722) | [LEGALISS Inc.](https://appshunter.io/developer/1835467219) |

## What reviewers say

### FourScan

[App page](https://appshunter.io/ios/app/fourscan-spy-detector/id6761895107)

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

**In-app purchases:** none


### Shift Pocket Calendar

[App page](https://appshunter.io/ios/app/shift-pocket-calendar/id6764268926)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shift Pocket Pro | $4.99 | per month |


## Frequently asked questions

### Is FourScan free?

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

### Is Shift Pocket Calendar free?

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

### Do FourScan or Shift Pocket Calendar have ads?

Neither FourScan nor Shift Pocket Calendar shows ads.

### Which is updated more often, FourScan or Shift Pocket Calendar?

FourScan ships an update every 5 days, and Shift Pocket Calendar weekly. Most recently, FourScan was updated on November 9, 2026 and Shift Pocket Calendar on October 28, 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.*