1. Home
  2. Topics
  3. Calendar Week Calculator

Best Calendar Week Calculator Apps

218+ iOS apps curated and reviewed

4.6 avg rating
19 free apps
Updated May 2026

If you already know Date and Time Calculator, this is the deeper bench. 218+ calendar week calculator apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of May 2026.

Top Picks for Calendar Week Calculator

Date and Time Calculator#1

Date and Time Calculator by 山 钟

Editor's Choice
🔧 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
Week Calendar - Smart Planner#2

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

Sync Agenda Tasks & Reminders
Strong Contender
📊 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
Calendars: Schedule Planner#3

Calendars: Schedule Planner by Readdle Technologies Limited

Reminder・Tasks Organizer・To Do
Worth Considering
📊 Productivity
4.7😊(120K ratings)
FreeAdsIn-App Purchases
#89in Productivity
Calendars: Schedule Planner screenshot 1
Calendars: Schedule Planner screenshot 2
Calendars: Schedule Planner screenshot 3
Calendars: Schedule Planner screenshot 4
Calendars: Schedule Planner screenshot 5
Calendars: Schedule Planner screenshot 6

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.

What We Love

  • 🌟 Excellent calendar app
  • 👍 Easy to use and organize
  • 🎨 Helpful color-coding
  • 📆 Seamless integration with other calendars

Room to Improve

  • 🐛 Occasional glitches and data loss
  • 💰 Concerns over subscription model
  • 🕰️ Cumbersome date/time selection process

More Calendar Week Calculator apps to explore

4
Days + Date + Time Calculator
Days + Date + Time Calculator
Days + Date + Time Calculator
Days Between Two Dates
Free

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.

Calculate days between datesCalculate duration between dates and timesCalculate duration between times
📊 Productivity
(795)
ad-supported
5
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
6
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
7
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
8
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
9
Calendar · Planner & Reminders
Calendar · Planner & Reminders
Calendar · Planner & Reminders
Planner Organizer & Agenda
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
10
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
11
Date Calculator - TimeRange
Date Calculator - TimeRange
Date Calculator - TimeRange
Work day counter & countdown
Free

Easily calculate the difference between dates, add or subtract days, and create custom countdowns. Personalize your workweek and skip specific dates for accurate workday calculations. Track events with home screen widgets and receive timely notifications.

Add/subtract days, weeks, months, yearsCustomizable workweek calculationsSkip specific dates
📊 Productivity
(169)
free with in-app purchases
12
Work Hours & Pay Calculator
Work Hours & Pay Calculator
Work Hours & Pay Calculator
Track time & expected salary
Free

Easily track your work hours, including shifts, breaks, and days off. Calculate your expected salary, overtime, and tips. Ideal for freelancers and self-employed individuals to ensure accurate pay.

Track shifts (night, 24-hour)Add days off and breaksTipped worker mode
💰 Finance
(14K)
free with in-app purchases
13
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
(1.9K)
ad-supported
14
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
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
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
(87K)
free with in-app purchases
17
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
(376K)
free with in-app purchases
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
TickTick:To-Do List & Calendar
TickTick:To-Do List & Calendar
TickTick:To-Do List & Calendar
Task remind, planner,countdown
Free

This app helps you manage tasks, schedule events, and build habits. It offers cross-device synchronization, multiple reminders, and collaboration features. Stay organized and boost productivity with its comprehensive planning tools.

Cross-device task synchronizationMultiple reminders and flexible schedulingCalendar views and integration
📊 Productivity
(44K)
freemium
20
Easy Calendar
Easy Calendar
Easy Calendar
by Tom van Zummeren
$1.99

This app offers a user-friendly weekly calendar experience, allowing for quick event creation and editing. It seamlessly syncs with your existing calendars and provides various views for planning and navigation. Enjoy customization options and helpful features like night mode.

Weekly calendar overviewSeamless native calendar integrationSyncs with iCloud, Outlook, Google Calendar
📊 Productivity
(2.6K)
subscription