# Calendar Week vs Weeknummer

The clearest difference is in-app purchases: Calendar Week at none against Weeknummer's 1. Weeknummer's advantage is update cadence (every 4 weeks vs every 4 months) and iOS requirement (15.6 vs 17.0). On price, ads and device support there is nothing between them.

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

Calendar Week ships an update every 4 months, Weeknummer every 4 weeks. The most recent releases landed on November 2, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Calendar Week | Weeknummer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (5 ratings)](https://appshunter.io/ios/app/calendar-week/id1195370546/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 75.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 85 MB | 23 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jana Grill](https://appshunter.io/developer/1195343114) | [Aizu Fon](https://appshunter.io/developer/6802761307) |

## What reviewers say

### Calendar Week

[App page](https://appshunter.io/ios/app/calendar-week/id1195370546)

This app displays the current calendar week number for your Apple Watch complication or iPhone widget. It also provides details on the first and last day of the current week.

**Highlights:** Calendar week number display, Apple Watch complication, iPhone widget, First day of week info, Last day of week info

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

**In-app purchases:** none


### Weeknummer

[App page](https://appshunter.io/ios/app/weeknummer-kalender/id6806248831)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Jaaroverzicht Pro | $0.99 | one-time |


## Frequently asked questions

### Is Calendar Week free?

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

### Is Weeknummer free?

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

### Do Calendar Week or Weeknummer have ads?

Neither Calendar Week nor Weeknummer shows ads.

### Which is updated more often, Calendar Week or Weeknummer?

Calendar Week ships an update every 4 months, and Weeknummer every 4 weeks. Most recently, Calendar Week was updated on November 2, 2026 and Weeknummer on October 26, 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.*