# Calendar Week Nerd — ISO Weeks, Widgets & Watch

> ISO Weeks, Widgets & Watch (iPhone/iPad app by Balthasar Siekiera.)

- Source: https://appshunter.io/ios/app/calendar-week-nerd/id6744461822 (this page in markdown: same URL + `.md`)
- Developer: [Balthasar Siekiera](https://appshunter.io/developer/1805185275)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.4 · 161 MB
- Languages: English, German, Swedish
- Released: 2025-09-26
- Data updated: 2026-07-06
- User reviews in markdown: https://appshunter.io/ios/app/calendar-week-nerd/id6744461822/reviews.md

## What is Calendar Week Nerd?

Have your most beautiful week ever.

Calendar Week Nerd is the ultimate week companion that respects both aesthetics and technical needs. Whether you just want minimal, colorful week widgets or need full custom week setup with ISO, fiscal years, and 9-day cycles, CWN adapts to you.

Features:
Beautiful Widgets: Home screen, lock screen, and interactive widgets in all sizes.
Custom Week Setup: Choose your start day, fiscal year, week numbering, even 9-day sprints with custom week lengths.
Apple Watch App + Complications: See week numbers and progress right on your wrist.
Calendar Navigation: Tap any week and jump directly into your calendar app.
Week & Year Arcs: Track where you are in the year at a glance.

Calendar Week Nerd
The perfect week system you didn't know you needed.

Privacy Policy: https://calendarweeknerd.app/privacy
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| CalendarWeekNerd+ Monthly | $1.99 | per month |
| CalendarWeekNerd Plus Yearly | $9.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| CalendarWeekNerd+ Lifetime | $29.99 | one-time |



## Version history (last 5 releases)

### 2026.3 — 2026-07-04

The first half of 2026 is over and widgets are now paid again.
If you downloaded the app prior to this release the widgets stay unlocked for you. Thank you for your support.

### 2026.2.1 — 2026-02-20

Small fixes and improvements

### 2026.2 — 2026-02-13

Basic widgets are now also available without Plus

### 2026.1 — 2026-02-02

Small fixes to improve overall stability and performance

### 2025.3 — 2025-12-01

Small fixes to improve overall stability and performance

## Apps similar to Calendar Week Nerd

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Date601](https://appshunter.io/ios/app/date601/id6743832119) | — | $0.99 | Utilities |
| [Calendarweek Widget](https://appshunter.io/ios/app/calendarweek-widget/id6443529551) | 4.0 (2) | Free | Utilities |
| [Pezzy – Pet Organizer](https://appshunter.io/ios/app/pezzy-pet-organizer/id6757300804) | — | Free | Utilities |
| [Weeklet - Week Number](https://appshunter.io/ios/app/weeklet-week-number/id6745425508) | — | Free | Utilities |
| [Week number app](https://appshunter.io/ios/app/week-number-app/id6738779215) | — | Free | Utilities |
| [WeekNo.](https://appshunter.io/ios/app/weekno/id6759828289) | — | Free | Utilities |

## More apps by Balthasar Siekiera

- [Quick Issues: Fast Git Capture](https://appshunter.io/ios/app/quick-issues-fast-git-capture/id6758988655)

All apps by Balthasar Siekiera: https://appshunter.io/developer/1805185275

## Related topics

[calendar week nerd](https://appshunter.io/ios/topics/calendar-week-nerd)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-06.*