WhichWeek vs WeekPeek
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
WhichWeek
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WhichWeek is the fastest way to know your ISO week number. Open the app and your current ISO week number is front and center ā bold, clear, and impossible to miss. No digging through a calendar. No mental arithmetic. Just the week number. WEEK VIEW ⢠Your current ISO week number, large and legible ⢠The exact date range for that week (Monday to Sunday) ⢠Step forward or back through weeks and years with the stepper controls ⢠Tap Today to jump straight back to the current week ⢠Leap year indicator so you never lose track of the extra day DAYS VIEW ⢠Pick any two dates and instantly see the number of days between them ⢠Broken down into full weeks and remaining days ⢠Perfect for project planning, countdowns, and date arithmetic DESIGNED WITH CARE ⢠Pure SwiftUI ā fast, native, and responsive ⢠Supports Dynamic Type for accessibility ⢠Full Dark Mode and Light Mode support ⢠Works in portrait and landscape ⢠Available on iPhone, iPad, Mac, and Apple Watch ISO WEEK NUMBERS ISO 8601 defines week numbering used widely in business, finance, logistics, and project management across Europe and beyond. Week 1 is the week containing the first Thursday of the year. WhichWeek follows this standard precisely. NO ADS. NO TRACKING. NO SUBSCRIPTIONS. WhichWeek is a one-time purchase. No accounts required, no data collected, no network requests made.
WeekPeek
Easily check the current week number and your schedule at a glance on your iPhone widgets, lock screen, and Apple Watch. View your calendar and upcoming events without unlocking your device, with seamless integration into your existing calendar.
- View current week number (CW)
- Home screen widgets for calendar and schedule
- Lock screen widgets with various layouts
- Apple Watch app for wrist-based calendar access
- Smart Stack support for Apple Watch
- Watch face complications for week number and dates
- Real-time sync with iOS Calendar
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Your calendar, without opening an app. WeekPeek puts your Apple Calendar on your Home Screen, Lock Screen, and Apple Watch. Keep adding events in the Calendar app you already use ā WeekPeek makes sure you see them the moment you look at your phone or wrist. ā¼ Lock Screen widgets See today's remaining events without unlocking your phone. Choose from Today's Events (your next 3), a 3-week calendar, and inline or circular week displays. ā¼ Home Screen widgets (small, medium, large) A full month with your events at a glance. On the large widget, tap a date to expand that day's events, tap an event to jump straight to it in the Calendar app, and switch months without leaving your Home Screen. ā¼ Apple Watch A weekly calendar and your events on your wrist. Turn the Digital Crown to move through events, and keep turning to cross into the next day. Includes watch face complications, a 3-week calendar, and an Upcoming Events widget for the Smart Stack. ā¼ Week numbers, if you need them Working with calendar weeks (CW)? The week number column shows the current week at all times ā on your widgets, Lock Screen, and Watch. Don't need it? Turn it off in settings. ā¼ Made for - Checking your schedule from the Lock Screen, dozens of times a day - Glancing at your wrist instead of opening apps - Anyone who plans by week numbers ā manufacturing, logistics, or teams abroad WeekPeek doesn't create or manage events. It does one thing well: showing your Apple Calendar, instantly, everywhere. * Available in English, German, and Korean.
Screenshots
Verdict
The clearest difference is iOS requirement: WeekPeek at 16.0 against WhichWeek's 26.4. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | WhichWeek | WeekPeek |
|---|---|---|
| Price | Free | Free |
| Positive reviews | ā | 100.0% of reviews |
| Update frequency | ā | Every 3 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | ā | Free |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Requires iOS | 26.4 | 16.0 ā better |
| Further details ā not scored | ||
| Size | 3 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Arthur Kahwa | KAHYUN YOON |
In-app purchases
WhichWeek
No in-app purchases
WeekPeek
No in-app purchases









