Best 1Calendars Apps

246+ iOS apps curated and reviewed

3.5 avg rating

20 free apps

Updated August 2026

Looking for free 1calendars apps? 20 of our 246+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top 1Calendars Apps (August 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	1CalendarS	Free	5.0★ (2)	No	Yes	May 2026
2	Calendars: Organizer & Planner	Free	—	No	Yes	May 2026
3	OneCalendar Free - All in one calendar	Free	4.0★ (1)	No	No	Aug 2026
4	My Calendar Global	Free	—	No	No	May 2026
5	#1 Fan: Sports Calendar	Free	5.0★ (3)	No	No	Sep 2026
6	Date Converter: All Calendars	Free	—	No	No	May 2026
7	trueCalendar	Free	—	No	No	May 2026
8	Busy Calendar - AI Assistant	Free	3.0★ (1)	No	No	May 2026

Top Picks for 1Calendars

#1

1CalendarS by KAIROS Company Limited

Editor's Choice

🔧 Utilities

5.0(2 ratings)

FreeIn-App Purchases

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Efficiently manage your schedule with multiple calendar views and customizable reminders. Sync your events across all your Apple devices seamlessly. Offers a free version with an optional premium subscription for enhanced features.

#2

Calendars: Organizer & Planner by Devita Ika Lestari

#1 Calendars Planner and Event

Strong Contender

📊 Productivity

0.0(0 ratings)

FreeIn-App Purchases

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#3

OneCalendar Free - All in one calendar by Hoan Ngo

Worth Considering

📊 Productivity

4.0(1 ratings)

Free

OneCalendar Free - All in one calendar screenshot 1

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This app combines multiple productivity tools into a single interface. Manage your schedule, to-do lists, weather forecasts, and notes with photo diaries, all in one place.

More 1Calendars apps to explore

My Calendar Global

My Calendar Global

My Calendar Global

My Calendar Global

#1 Fan: Sports Calendar

#1 Fan: Sports Calendar

#1 Fan: Sports Calendar

Your teams, in your calendar

Sync sports schedules directly into your device's calendar. Follow your favorite teams and leagues, and receive automatic updates for game times and changes. Enjoy a seamless experience without ads or tracking.

Syncs team schedules to your calendarAutomatic updates for game timesSupports NFL, NBA, MLB, NHL, F1, Golf, Soccer

Date Converter: All Calendars

Date Converter: All Calendars

Date Converter: All Calendars

by Fahad Alrashidi

by John Chambers

Busy Calendar - AI Assistant

Busy Calendar - AI Assistant

Busy Calendar - AI Assistant

Smart and Simple Scheduling

This AI-powered scheduling tool integrates with your existing calendars to intelligently plan new events around your availability. It offers a Kanban-style view with dedicated panes for today, this week, and unscheduled items, allowing for easy drag-and-drop management of tasks and events.

AI-powered smart schedulingDrag-and-drop event managementKanban-style calendar view

BestWeekCalendarView

BestWeekCalendarView

BestWeekCalendarView

Your full week in 1 view

📊 Productivity

Calendar App- Schedule Planner

Calendar App- Schedule Planner

Calendar App- Schedule Planner

Plan Your Day, Week & Life

📊 Productivity

Calendar+ - Event Scheduling

Calendar with Task Manager

This app offers a customizable calendar and task management system with event categorization and alerts. It provides a visually appealing interface for tracking tasks and scheduling important dates.

Calendar with task markingsEvent categorizationCustomizable alerts

Calendar Op.2: Planner & Diary

Calendar Op.2: Planner & Diary

Calendar Op.2: Planner & Diary

Aesthetic Planner & Diary

Organize your daily schedule with a clean and simple calendar app. It offers a beautiful month and list view with event titles, a mini pop-up for daily events, and seamless scrolling. Easily copy and paste events and search your schedule.

Works with built-in iOS calendarMonth & list view with event titleMini pop-up for daily events

📊 Productivity

free with in-app purchases

Farmark: Family Calendar

Farmark: Family Calendar

Farmark: Family Calendar

Turn schedules into one plan

📊 Productivity

Share calendar photo family

Share calendar photo family

Share calendar photo family

Create personalized calendars

Design personalized calendars using your own photos and pre-made templates. Easily create custom photo collages and monthly calendars to keep track of your days. Turn any photo into a wallpaper with this intuitive photo editing tool.

Personalized calendar creationPhoto collage designCalendar templates

📷 Photo & Video

free with in-app purchases

Desktop Calendar - WallCal

Desktop Calendar - WallCal

Desktop Calendar - WallCal

to be with your Loved Photos

Calday: Calendar & Todo

Calday: Calendar & Todo

Calday: Calendar & Todo

Daily Planner, Widget, Lunar

TV & Movie Calendar Sync

TV & Movie Calendar Sync

TV & Movie Calendar Sync

by Keith Barney

🎬 Entertainment

CompactCalendar - Month Widget

CompactCalendar - Month Widget

CompactCalendar - Month Widget

Clean calendar & reminders

Display your calendar events and reminders directly on your Home Screen and Lock Screen with customizable widgets. See your schedule at a glance, choose which calendars to display, and enjoy true calendar colors.

Home Screen widgetsLock Screen widgetsEvents and reminders together

📊 Productivity

free with in-app purchases

Global Calendar: World Events

Global Calendar: World Events

Global Calendar: World Events

Photo2Calendar: Smart Events

Photo2Calendar: Smart Events

Photo2Calendar: Smart Events

Snap schedules, save instantly

📊 Productivity

FAQ about 1Calendars

What are the best 1calendars apps for iPhone?

1CalendarS tops our 1calendars apps ranking as of August 2026, with a 5.0-star average from 2 App Store ratings, and it's free to download.

Are there free 1calendars apps for iPhone?

Yes — 20 of the top 1calendars apps we rank are free to download, including 1CalendarS and Calendars: Organizer & Planner.

Does 1CalendarS have ads or in-app purchases?

1CalendarS has no ads and offers in-app purchases, according to its App Store listing as of August 2026.

How many 1calendars apps are on the App Store?

We track 246+ 1calendars apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.

What is 1CalendarS?

1CalendarS is a utility app designed to help users efficiently manage their schedules with various calendar views and customizable reminders. It supports synchronization across multiple Apple devices.

What are the subscription options for 1CalendarS?

1CalendarS offers a premium subscription with monthly and annual plans. The monthly subscription costs $1.99, and the annual subscription is $19.99. Subscriptions auto-renew unless canceled at least 24 hours before the current period ends.