Comparison

WhichWeek vs WeekPeek

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

WhichWeek

Features
Read full description

WhichWeek is the fastest way to know your ISO week number. Open the app and your current ISO week number is front and center — 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 — 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.

About

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.

Highlights
  • 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
Features
Read full description

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 — WeekPeek makes sure you see them the moment you look at your phone or wrist. ā—¼ 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. ā—¼ 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. ā—¼ 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. ā—¼ Week numbers, if you need them Working with calendar weeks (CW)? The week number column shows the current week at all times — on your widgets, Lock Screen, and Watch. Don't need it? Turn it off in settings. ā—¼ 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 — 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

WhichWeek2 screens
WeekPeek4 screens

Verdict

The call

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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference Ā· 7 level
WhichWeek versus WeekPeek: the parameters behind the verdict, then further details
ParameterWhichWeekWeekPeek
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequency—Every 3 days
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPadiPhone, Apple Watch
Requires iOS26.416.0 — better
Further details — not scored
Size3 MB2 MB
Age rating4+4+
DeveloperArthur KahwaKAHYUN YOON

In-app purchases

None

WhichWeek

No in-app purchases

None

WeekPeek

No in-app purchases

Questions

Is WhichWeek free?
WhichWeek is free to download, with no in-app purchases.
Is WeekPeek free?
WeekPeek is free to download, with no in-app purchases.
Do WhichWeek or WeekPeek have ads?
Neither WhichWeek nor WeekPeek shows ads.

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