Best To Do List, Calendar Organizer Apps

0+ iOS apps curated and reviewed

4.7 avg rating
20 free apps
Updated September 2026

Calendars is the household name in to do list, calendar organizer, but it's far from the only option. We track 0+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top To Do List, Calendar Organizer Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Calendars: Schedule PlannerCalendars: Schedule PlannerFree4.7★ (122K)NoYesSep 2026
2Structured: Daily Planner TodoStructured: Daily Planner TodoFree4.8★ (166K)NoYesSep 2026
3TickTick:To-Do List & CalendarTickTick:To-Do List & CalendarFree4.9★ (46K)NoYesSep 2026
4Calendar All-In-One PlannerCalendar All-In-One PlannerFree4.3★ (96)YesYesSep 2026
5Google Calendar: Get OrganizedGoogle Calendar: Get OrganizedFree4.5★ (132K)NoYesSep 2026
6Calendar · Planner & RemindersCalendar · Planner & RemindersFree4.6★ (59K)YesYesSep 2026
7Google Tasks: Get Things DoneGoogle Tasks: Get Things DoneFree4.8★ (106K)NoNoSep 2026
8Do! - Simple To Do ListDo! - Simple To Do ListFree4.7★ (26K)YesYesSep 2026

Top Picks for To Do List, Calendar Organizer

Calendars: Schedule Planner#1

Calendars: Schedule Planner by Readdle Technologies Limited

2026 Daily Organizer・Reminder
Editor's Choice
📊 Productivity
4.7😊(122K ratings)
FreeIn-App Purchases
#95in 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
  • 🗓️ Detailed monthly/weekly views
  • 📝 Useful task management features

Room to Improve

  • 🐛 Occasional glitches and data loss
  • 💰 Concerns over subscription model
  • 🕰️ Cumbersome date/time selection process
  • 🔍 Limited location search functionality
  • 🔄 Sync issues between devices
Structured: Daily Planner Todo#2

Structured: Daily Planner Todo by unorderly GmbH

Visual Calendar & Organizer
Strong Contender
📊 Productivity
4.8😊(166K ratings)
FreeIn-App Purchases
#66in Productivity
Structured: Daily Planner Todo screenshot 1
Structured: Daily Planner Todo screenshot 2
Structured: Daily Planner Todo screenshot 3
Structured: Daily Planner Todo screenshot 4
Structured: Daily Planner Todo screenshot 5
Structured: Daily Planner Todo screenshot 6

Organize your day with a visual timeline that integrates your calendar, to-dos, routines, and habits. This app helps users feel calmer, focus faster, and accomplish more daily. It's ideal for work, study, travel, and managing ADHD, offering planning tools and focus timers.

What We Love

  • 🚀 Highly organized and structured
  • 🎨 Customizable colors and icons
  • ⏱️ Visualizes time and task duration
  • 🗓️ Integrates with calendar and reminders
  • 🧠 Helpful for ADHD and neurodivergent users
  • 💰 Affordable one-time purchase
  • 🤝 Generous scholarship program
  • 🧑‍💻 Responsive and caring developer

Room to Improve

  • 🕰️ Tedious to change task times
  • 🔀 Difficulty rearranging tasks
  • 🔍 Lack of search for icons
  • 📅 Missing weekly/monthly view
  • ⏰ Notifications not customizable
  • 🤖 Apple Watch app issues
  • 💻 Mac app crashes frequently
TickTick:To-Do List & Calendar#3

TickTick:To-Do List & Calendar by Appest Limited

Task remind, planner,countdown
Worth Considering
📊 Productivity
4.9😊(46K ratings)
FreeIn-App Purchases
#89in Productivity
TickTick:To-Do List & Calendar screenshot 1
TickTick:To-Do List & Calendar screenshot 2
TickTick:To-Do List & Calendar screenshot 3
TickTick:To-Do List & Calendar screenshot 4
TickTick:To-Do List & Calendar screenshot 5
TickTick:To-Do List & Calendar screenshot 6

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.

What We Love

  • 🚀 Highly customizable
  • 👍 Clean, intuitive interface
  • 🕰 Excellent habit tracking
  • 📅 Seamless calendar integration
  • 💡 Versatile task management features
  • 🔍 Powerful search and organization tools
  • 🤝 Effective collaboration capabilities
  • 🎨 Visually appealing with theming options
  • 💻 Cross-platform availability

Room to Improve

  • 🐛 Occasional syncing issues
  • 🔒 Subscription required for full functionality
  • 📝 Limited formatting options in notes
  • 🕰 Pomodoro timer could be more streamlined
  • 🗓 Calendar view could be more intuitive

More To Do List, Calendar Organizer apps to explore

FAQ about To Do List, Calendar Organizer

What are the best to do list, calendar organizer apps for iPhone?
Calendars: Schedule Planner tops our to do list, calendar organizer apps ranking as of September 2026, with a 4.7-star average from 122K App Store ratings, and it's free to download.
Yes — 20 of the top to do list, calendar organizer apps we rank are free to download, including Calendars: Schedule Planner and Structured: Daily Planner Todo.
Calendars: Schedule Planner has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
Calendars by Readdle is an all-in-one app that functions as a calendar, task manager, daily planner, and habit tracker. It is designed to help users organize their schedules, manage tasks, build routines, and improve overall productivity across their Apple devices.
Key features include viewing and managing your calendar with various views (daily, weekly, monthly), creating events and reminders, organizing to-do lists, adding items using natural language, tracking habits, and syncing across devices with services like Google Calendar and iCloud. It also integrates with meeting platforms like Zoom and Google Meet.