Best 13 Month Fixed Calendar Apps

250+ iOS apps curated and reviewed

3.5 avg rating
18 free apps
Updated October 2026

From beginner-friendly picks to power-user tools, our 13 month fixed calendar list covers 250+ iPhone apps updated through October 2026. Compare ratings, prices, and screenshots in one place.

Compare top 13 Month Fixed Calendar Apps (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1International Fixed CalendarInternational Fixed CalendarFree3.2★ (12)NoNoOct 2026
2Timepage: Calendar PlannerTimepage: Calendar PlannerFree4.6★ (15K)NoYesNov 2026
3Koyomi (Calendar)Koyomi (Calendar)Free—NoNoSep 2026
4Moon Year CalendarMoon Year CalendarFree—NoNoMay 2026
5Roots CalendarRoots CalendarFree—NoNoJun 2026
6Circa: Life CalendarCirca: Life CalendarFree—NoYesAug 2026
7PocketLife CalendarPocketLife CalendarFree4.7★ (42K)YesYesNov 2026
8Countdown: Memento CalendarCountdown: Memento CalendarFree—NoYesOct 2026

Top Picks for 13 Month Fixed Calendar

3.2(12 ratings)
Free
International Fixed Calendar screenshot 1

Explore an alternative calendar system with 13 equal months. This app provides access to the International Fixed Calendar, featuring widgets and Apple Watch integration for easy date checking. Discover a historical calendar reform used by Kodak.

Timepage: Calendar Planner#2

Timepage: Calendar Planner by Bonobo

Weather & Family Appointments
Strong Contender
📊 Productivity
4.6😐(15K ratings)
FreeIn-App Purchases
Timepage: Calendar Planner screenshot 1
Timepage: Calendar Planner screenshot 2
Timepage: Calendar Planner screenshot 3
Timepage: Calendar Planner screenshot 4
Timepage: Calendar Planner screenshot 5
Timepage: Calendar Planner screenshot 6

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.

What We Love

  • 🚀 Gorgeous design
  • 👍 Intuitive and easy to use
  • 💡 Useful features like weather, travel time estimates
  • 👍 Highly customizable
  • 🚀 Smooth performance

Room to Improve

  • 🐛 Buggy, crashes frequently
  • 🔒 Subscription model required for full functionality
  • 🔒 Separate subscription for companion app
  • 🔋 Slow load times
  • 👎 Missing key features like month view, to-do list
Koyomi (Calendar)#3

Koyomi (Calendar) by Kouichi Abe

Simple Three Months Calendar
Worth Considering
📊 Productivity
0.0(0 ratings)
Free
Koyomi (Calendar) screenshot 1
Koyomi (Calendar) screenshot 2

This simple calendar app displays three months at a time, along with an annual view. Easily navigate between months and years with intuitive scrolling gestures. It offers a straightforward yet highly useful way to manage your schedule.

More 13 Month Fixed Calendar apps to explore

FAQ about 13 Month Fixed Calendar

What are the best 13 month fixed calendar apps for iPhone?
International Fixed Calendar tops our 13 month fixed calendar apps ranking as of October 2026, with a 3.2-star average from 12 App Store ratings, and it's free to download.
Yes — 18 of the top 13 month fixed calendar apps we rank are free to download, including International Fixed Calendar and Timepage: Calendar Planner.
International Fixed Calendar has no ads and has no in-app purchases, according to its App Store listing as of October 2026.
We track 250+ 13 month fixed calendar apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.