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Best Calendars By Readdle Apps

221+ iOS apps curated and reviewed

4.7 avg rating
19 free apps
Updated May 2026

Out of 221+ calendars by readdle apps on iOS, 19 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Top Picks for Calendars By Readdle

Calendars: Schedule Planner#1

Calendars: Schedule Planner by Readdle Technologies Limited

Reminder・Tasks Organizer・To Do
Editor's Choice
📊 Productivity
4.7😊(120K ratings)
FreeAdsIn-App Purchases
#92in 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
Google Calendar: Get Organized#2

Google Calendar: Get Organized by Google LLC

Easily plan & schedule
Strong Contender
📊 Productivity
4.5😊(131K ratings)
FreeAdsIn-App Purchases
#13in Productivity
Google Calendar: Get Organized screenshot 1
Google Calendar: Get Organized screenshot 2
Google Calendar: Get Organized screenshot 3
Google Calendar: Get Organized screenshot 4
Google Calendar: Get Organized screenshot 5
Google Calendar: Get Organized screenshot 6

This official app helps you manage your schedule and stay organized. It automatically adds events from Gmail, syncs across devices, and allows for shared calendars. You can also create tasks, customize views, and integrate with Google Meet for collaboration.

What We Love

  • 🚀 Keeps me organized
  • 🎨 Customizable colors
  • 📅 Integrates with email and other calendars
  • 🔔 Helpful reminders

Room to Improve

  • 🐛 Crashes and freezes
  • 🕰️ Slow loading times
  • 📆 Date on app icon doesn't change
Simple Calendar - SimpleCal#3

Simple Calendar - SimpleCal by Yohei Fujikawa

Tasks & ToDo for your schedule
Worth Considering
📊 Productivity
4.7😊(16K ratings)
FreeAdsIn-App Purchases
Simple Calendar - SimpleCal screenshot 1
Simple Calendar - SimpleCal screenshot 2
Simple Calendar - SimpleCal screenshot 3
Simple Calendar - SimpleCal screenshot 4
Simple Calendar - SimpleCal screenshot 5
Simple Calendar - SimpleCal screenshot 6

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.

What We Love

  • 😍 Awesome!!
  • 👍 Easy to use
  • 👍 Well-organized
  • 🎨 Helpful color-coding

Room to Improve

  • 🐛 Deleted events/data loss
  • 🔒 Requires full access to Apple Calendar
  • 🗓️ Can't edit read-only events

More Calendars By Readdle apps to explore

4
Tiny Calendar: Planner & Tasks
Tiny Calendar: Planner & Tasks
Tiny Calendar: Planner & Tasks
Agenda, Organizer & Reminders
Free

This intuitive calendar app syncs with your existing calendars, offering powerful event creation and management tools. Access your schedule offline, set advanced reminders, and view your events in multiple formats on your iPhone, iPad, and Apple Watch.

Natural language input for event creationDrag and drop event editingSyncs with Google Calendar and iOS local calendars
📊 Productivity
(20K)
subscription
5
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
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
minical - Planner & Calendar
minical - Planner & Calendar
minical - Planner & Calendar
위젯 지원 및 공유 가능한 간단한 일정 플래너
Free

This app offers a minimalist and intuitive way to manage your schedule. View events at a glance with home and lock screen widgets, color-code them for easy distinction, and quickly edit them with smart suggestions. Stay organized with customizable notifications and cloud syncing.

Minimalist designHome & lock screen widgetsEvent color-coding
📊 Productivity
(5.5K)
free with in-app purchases
8
One Calendar
One Calendar
One Calendar
All calendars in ONE place!
Free

Consolidate all your digital calendars into a single, easy-to-read view. Manage appointments, events, and birthdays from various providers like Google, Outlook, iCloud, and more, all within one application.

Integrates multiple calendar providersEasy-to-read overviewManage appointments and events
📊 Productivity
(20K)
free with in-app purchases
9
Notion Calendar
Notion Calendar
Notion Calendar
For your work and life
Free

Manage your schedule and events with a unified view across multiple calendars. Integrate with your Notion workspace to link documents and projects directly to your events. Offers customizable widgets for quick access to upcoming appointments and event details.

Deep Google Calendar integrationConnect Notion docs and projectsMultiple time zone support
📊 Productivity
(6.8K)
free
10
Simple Calendar: ToDo Planner
Simple Calendar: ToDo Planner
Simple Calendar: ToDo Planner
Schedule list & day organizer
Free
$6.99 | 100% OFF

This app offers a streamlined calendar experience with a focus on simplicity and ease of use. It allows for easy sharing of schedules, extensive customization options like font size and color-coding, and secure passcode locking. It's ideal for users seeking a functional, minimalist organizer.

Schedule sharing15 WidgetsAdjustable font size
📊 Productivity
(6.4K)
free with in-app purchases
11
PaperCal
PaperCal
PaperCal
Aesthetic calendar & widgets
$3.99

This app offers a visually appealing and user-friendly calendar experience, reimagined for iPhone. It features clean, paper-inspired layouts and beautiful widgets for your Home and Lock Screen, allowing you to see tasks and events together in one place.

Paper-inspired layoutsHome and Lock Screen widgetsTasks and events in one view
📊 Productivity
(411)
paid
12
Week Calendar - Smart Planner
Week Calendar - Smart Planner
Week Calendar - Smart Planner
Sync Agenda Tasks & Reminders
Free

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.

Customizable calendar views (Day, Agenda, Month, Year)Event automation and templatesDrag-and-drop event rescheduling
📊 Productivity
(10K)
free with in-app purchases
13
Fantastical Calendar
Fantastical Calendar
Fantastical Calendar
Reminders & Todo List
Free

This powerful calendar and task management app offers intuitive natural language input for event creation, multiple calendar views, and robust task integration. It provides weather forecasts and advanced features like meeting polls and video conferencing integration for premium users.

Natural language event and task creationMultiple calendar views (day, week, month, year)Integrated task management (Todoist, Google Tasks)
📊 Productivity
(23K)
freemium
14
Calendar
Calendar
Calendar
by Apple Inc.
Free

Organize your entire schedule in one place. View events from multiple accounts, manage tasks, and plan gatherings with others. Stay on top of appointments, holidays, and birthdays with customizable views and shared calendars.

Unified schedule viewEvent creation and editingTask management integration
📊 Productivity
(1.5M)
free
15
Timepage: Calendar Planner
Timepage: Calendar Planner
Timepage: Calendar Planner
Weather & Family Appointments
Free

This app offers a visually appealing and intuitive way to manage your schedule. It integrates events, maps, contacts, and weather to help you plan your day efficiently. Features include timeline views, weather forecasts, travel time estimates, and customizable themes.

Intuitive timeline viewMonth heatmap for busy/free timesAnimated weather forecasts
📊 Productivity
(15K)
subscription
16
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
17
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
18
FirstSeed Calendar
FirstSeed Calendar
FirstSeed Calendar
Calendars and widgets
Free

A powerful scheduling app that manages both events and reminders. It offers innovative calendar views, interactive widgets for various iOS versions, and seamless syncing with Apple's Calendar and Reminders apps. An optional paid upgrade unlocks advanced features like natural language event processing and drag-and-drop functionality.

Interactive and lock-screen widgetsFull-featured month, week, and list viewsEvent and reminder management
📊 Productivity
(324)
free with in-app purchases
19
Shared Family Calendar: FamCal
Shared Family Calendar: FamCal
Shared Family Calendar: FamCal
Share Schedules, Lists & Notes
Free

This app helps families stay organized by sharing schedules, tasks, lists, and notes in one central location. It allows for easy event management, collaborative list creation, and memo sharing to keep everyone connected and informed.

Shared family calendarTask assignment and listsFamily memos and notes
📊 Productivity
(27K)
free with in-app purchases
20
Cozi Family Organizer
Cozi Family Organizer
Cozi Family Organizer
Shared Calendar & To-Do Lists
Free

This app helps families organize their busy lives with a shared calendar, to-do lists, and recipe box. It keeps everyone on the same page for appointments, shopping, and meal planning, accessible from any device.

Shared family calendarColor-coded schedulingReminders and agenda emails
📊 Productivity
(386K)
free with in-app purchases

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