Best Calendar Week Calculator Apps

212+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated July 2026

If you already know Week Calendar, this is the deeper bench. 212+ calendar week calculator apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of July 2026.

Compare top Calendar Week Calculator Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Week Calendar - Smart PlannerWeek Calendar - Smart PlannerFree4.4★ (10K)YesYesAug 2026
2Days + Date + Time CalculatorDays + Date + Time CalculatorFree4.7★ (795)YesNoAug 2026
3Date and Time CalculatorDate and Time CalculatorFree4.7★ (9.1K)YesNoAug 2026
4Calendars: Schedule PlannerCalendars: Schedule PlannerFree4.7★ (121K)NoYesAug 2026
5Weekly Planner - Diary, NotesWeekly Planner - Diary, NotesFree4.7★ (15K)NoYesAug 2026
6Calendar Week CalculatorCalendar Week CalculatorFreeNoNoMay 2026
7Simple Calendar - SimpleCalSimple Calendar - SimpleCalFree4.7★ (16K)YesYesAug 2026
8Work Week CalculatorWork Week CalculatorFree4.3★ (3)NoNoMay 2026

Top Picks for Calendar Week Calculator

Week Calendar - Smart Planner#1

Week Calendar - Smart Planner by Do More Mobile, LLC.

Sync Agenda Tasks & Reminders
Editor's Choice
📊 Productivity
4.4😐(10K ratings)
FreeAdsIn-App Purchases
Week Calendar - Smart Planner screenshot 1
Week Calendar - Smart Planner screenshot 2
Week Calendar - Smart Planner screenshot 3
Week Calendar - Smart Planner screenshot 4
Week Calendar - Smart Planner screenshot 5
Week Calendar - Smart Planner screenshot 6

This app offers a highly customizable calendar experience with multiple view options and automation tools. It allows for easy event management, integration with popular calendar services, and includes features like weather forecasts and calendar insights. An optional Pro version unlocks additional widgets and features.

What We Love

  • 👍 Excellent calendar app
  • 🚀 Highly customizable
  • 💡 Useful features like color-coding, templates, and rolling events
  • 👍 Easy to use and organize schedule

Room to Improve

  • 🐛 Occasional bugs and glitches
  • 💰 Aggressive push for subscription upgrade
  • 🔒 Concerns about privacy and data collection
Days + Date + Time Calculator#2

Days + Date + Time Calculator by 山 钟

Days Between Two Dates
Strong Contender
📊 Productivity
4.7😊(795 ratings)
FreeAds
Days + Date + Time Calculator screenshot 1
Days + Date + Time Calculator screenshot 2
Days + Date + Time Calculator screenshot 3

Calculate the duration between two dates and times. This tool helps you find the exact number of days, hours, and minutes between any two points in time.

What We Love

  • 👍 Excellent app
  • 👍 Helpful and useful
  • 👍 Great variety of fonts and symbols
  • 👍 Easy to use

Room to Improve

  • 🐛 Excessive advertising
  • 🐛 Compatibility issues with updates
  • 🔋 High battery consumption
Date and Time Calculator#3

Date and Time Calculator by 山 钟

Worth Considering
🔧 Utilities
4.7😐(9.1K ratings)
FreeAds
Date and Time Calculator screenshot 1
Date and Time Calculator screenshot 2
Date and Time Calculator screenshot 3

Calculate the exact number of days, hours, and seconds between any two dates. This tool also allows you to find the date before or after a specified period, making it useful for tracking deadlines, events, or financial products.

What We Love

  • 💡 Helpful for tracking dates and time
  • 👍 Simple and easy to use
  • 🚀 Accurate calculations
  • 🚀 Useful for various purposes (medication management, work timelines, etc.)

Room to Improve

  • 🐛 Ads are intrusive and difficult to close
  • 🐛 Compatibility issues on iPad
  • 🐛 Bugs with date/time calculations

More Calendar Week Calculator apps to explore

4
Calendars: Schedule Planner
Calendars: Schedule Planner
Calendars: Schedule Planner
2026 Daily Organizer・Reminder
Free

This app combines a calendar, task manager, daily planner, and habit tracker. It helps users plan their day, build habits, boost productivity, and stay organized with seamless syncing across all Apple devices. Features include event creation, to-do list management, natural language input, and integration with popular meeting platforms.

Calendar, task, and habit managementDaily, weekly, and monthly viewsNatural language event creation
📊 Productivity
(121K)
free with in-app purchases
5
Weekly Planner - Diary, Notes
Weekly Planner - Diary, Notes
Weekly Planner - Diary, Notes
Visual calendar & to do list
Free

Organize your life with a simple, visual weekly planner. Easily add appointments, to-do lists, and recurring events. Enjoy a minimalist approach to tracking tasks and priorities, similar to a paper planner but digital.

Visual weekly calendarTo-do list creationAdd appointments and tasks
📊 Productivity
(15K)
free with in-app purchases
6
Calendar Week Calculator
Calendar Week Calculator
Calendar Week Calculator
by Schnitzer Anlauf- und Projektmanagement GmbH
Free

Quickly calculate project durations, start dates, or end dates based on a given number of weeks. This tool adheres to the ISO 8601 standard for accurate scheduling.

Calculate project duration from start and end datesDetermine end date from start date and durationDetermine start date from end date and duration
📊 Productivity
(0)
free
7
Simple Calendar - SimpleCal
Simple Calendar - SimpleCal
Simple Calendar - SimpleCal
Tasks & ToDo for your schedule
Free

This app offers a straightforward way to manage your schedule, sync events across devices using iCloud or Google Calendar, and stay organized with reminders and weather forecasts. Its customizable interface and simple design make adding and editing events quick and intuitive.

Cross-platform sync (iCloud/Google)Event reminders (daily, weekly, monthly, yearly)Weather forecast integration
📊 Productivity
(16K)
free with in-app purchases
8
Work Week Calculator
Work Week Calculator
Work Week Calculator
WorkWeekCalc
Free

This app helps professionals quickly determine work weeks and corresponding dates. It allows customization of the fiscal year start and the first day of the work week, with the current work week displayed on the app icon.

Determine work week from a dateDetermine date from a work weekConfigure fiscal year start
💼 Business
(3)
free
9
Vantage Calendar
Vantage Calendar
Vantage Calendar
Calendar & To-Do List
Free

This app offers a visually engaging way to manage your schedule and to-do lists. It uses colorful cues, stickers, and "stacks" to help you understand your day at a glance. Integrated to-dos can be easily scheduled by dragging and dropping them onto dates.

Visual cues (colors, stickers, book covers)Summarize days with 'Stacks'Integrated to-do lists in notebooks
📊 Productivity
(1.8K)
free with in-app purchases
10
Simple Calendar・Schedule app
Simple Calendar・Schedule app
Simple Calendar・Schedule app
simple and cool calendar app
Free

This app offers a streamlined calendar experience, focusing on essential features for easy event management. It's designed for users who prefer simplicity and a clean interface over complex functionalities. Get organized with core calendar tools and helpful notifications.

Calendar viewEvent creationSearch functionality
📊 Productivity
(2.3K)
ad-supported
11
Calendar · Planner & Reminders
Calendar · Planner & Reminders
Calendar · Planner & Reminders
Tasks, Agenda & To Do List AI
Free

This app offers a streamlined calendar experience with beautiful, intuitive views of your schedule. It unifies events and reminders, allows for quick natural language event entry, and provides contact history. It supports major calendar services and offers premium features through subscription.

Intuitive day and month viewsUnified events and remindersNatural language event entry
📊 Productivity
(59K)
free with in-app purchases
12
Saturn Calendar
Saturn Calendar
Saturn Calendar
Manage and share your time
Free

This app is designed for students to manage complex school schedules, including rotating periods and group events. It simplifies planning with friends and classmates, allowing users to share schedules and coordinate activities easily. Stay organized for high school and college with features tailored to student life.

Rotating period supportBlock schedule managementSocial schedule sharing
📊 Productivity
(68K)
free
13
PocketLife Calendar
PocketLife Calendar
PocketLife Calendar
Calendar Organizer & Reminders
Free

Organize your life with a stylish and intuitive calendar app. It offers powerful customization, seamless syncing with popular services, and natural language event creation. Share events, set reminders, and personalize your calendar views.

Calendar sharing with friends and familyFast sync with Google, Outlook, iCal, Yahoo, iCloudCreate events using natural language
📊 Productivity
(41K)
free with in-app purchases
14
TimeTree: Shared Calendar
TimeTree: Shared Calendar
TimeTree: Shared Calendar
Make a Shared Calendar
Free

This app allows users to create and share calendars with family, friends, or colleagues. It facilitates event planning, communication, and organization through shared schedules, photo albums, and to-do lists. Stay connected and manage your time effectively with this collaborative scheduling tool.

Shared calendars for groupsEvent notifications and remindersSync with device calendars
📊 Productivity
(89K)
free with in-app purchases
15
24me: Calendar・Planner & To Do
24me: Calendar・Planner & To Do
24me: Calendar・Planner & To Do
Reminders, Schedule, Organizer
Free

This app acts as a smart personal assistant, consolidating your calendar, to-do lists, notes, and personal accounts into one unified platform. It streamlines daily management with features like voice commands, smart reminders, and email-to-task conversion, helping you stay organized and productive.

Unified calendar and plannerSmart task manager and to-do listSimple notes and lists
📊 Productivity
(6.7K)
free with in-app purchases
16
Pregnancy Baby Tracker - WTE
Pregnancy Baby Tracker - WTE
Pregnancy Baby Tracker - WTE
Track Development & Growth
Free

This app guides you through pregnancy and early parenthood with weekly updates, development trackers, and expert advice. It helps you monitor your baby's growth, manage symptoms, and connect with other parents.

Week-by-week pregnancy trackerDue date calculatorBaby development and growth tracking
🏥 Medical
(378K)
free with in-app purchases
17
Awesome Calendar 2
Awesome Calendar 2
Awesome Calendar 2
reminders, note & planner app
Free

Enhance your daily schedule with a feature-rich calendar app. Add visual flair with stickers, create checklists and notes with photos, and access your schedule instantly via a widget. Customize themes, icons, and more to personalize your planning experience.

Calendar with notes and checklistsCustomizable stickers and markersLock screen widget for quick access
📊 Productivity
(4.8K)
freemium
18
Pencil Planner & Calendar Pro
Pencil Planner & Calendar Pro
Pencil Planner & Calendar Pro
Daily digital passion agenda
Free

This app merges your digital calendar with a handwritten planner experience. Use your stylus to write directly over digital events, offering the best of both worlds for scheduling and note-taking. Plan your days, weeks, and months with a natural writing feel.

Handwritten notes over digital calendar eventsDaily, weekly, monthly, and yearly planningSyncs with device calendars and reminders
📊 Productivity
(12K)
subscription
19
Calendar Z
Calendar Z
Calendar Z
Simple schedule planner with r
Free

A straightforward yet powerful calendar application designed for efficient schedule management. It features an integrated reminder system, supports Apple Watch, and offers advanced options for recurring events and event display.

Integrated reminder systemApple Watch compatibilityAdvanced repeating event setup
📊 Productivity
(708)
free with in-app purchases
20
Pregnancy Week Tracker
Pregnancy Week Tracker
Pregnancy Week Tracker
Your Pregnancy Tracker
Free

Track your pregnancy progress with a clear overview of your current week and trimester. Calculate your due date and see the remaining days until your baby's arrival. Never lose track of your pregnancy journey.

Current pregnancy week and day trackingTrimester informationCountdown to baby's birth
🏥 Medical
(62)
ad-supported

FAQ about Calendar Week Calculator

What are the best calendar week calculator apps for iPhone?
Week Calendar - Smart Planner tops our calendar week calculator apps ranking as of July 2026, with a 4.4-star average from 10K App Store ratings, and it's free to download.
Yes — 20 of the top calendar week calculator apps we rank are free to download, including Week Calendar - Smart Planner and Days + Date + Time Calculator.
Week Calendar - Smart Planner shows ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 212+ calendar week calculator apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
Week Calendar is a highly adaptable and customizable calendar application designed to streamline your busy life. It offers various views like Day, Agenda, Mini Month, Month, and Year, along with automation tools for easy event management. It also integrates with popular calendar services and provides features like weather forecasts and calendar insights.
Key features include customizable calendar views, event automation and templates, drag-and-drop rescheduling, integrated weather forecasts, calendar insights, and the ability to subscribe to popular calendars. It also syncs with major calendar services like iCloud, Google Calendar, and Outlook.