Comparison

Calndars vs Messo

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Calndars

Effortlessly convert dates between over 30 major calendar systems, including Gregorian, Islamic, and Chinese. This utility is designed for global professionals and researchers needing precise cross-cultural date translations. Integrates with widgets and Shortcuts for seamless workflow.

Highlights
  • Convert dates across 30+ calendar systems
  • Supports Gregorian, Islamic, Chinese, Hebrew, Persian, and more
  • Native experience on iPhone, iPad, Mac, Apple Watch
  • Customizable widgets
  • Shortcuts integration
  • AppleScript support on macOS
Read full description

Convert dates across cultures with precision and speed. Calndars is a powerful yet minimal calendar converter designed for global professionals, researchers, and anyone working across time systems. Instantly translate dates between major calendar systems including Gregorian, Hebrew, Islamic, Chinese, Persian, and more. Whether you're coordinating international projects or exploring historical timelines, Calndars delivers accurate results in seconds. Built with modern Apple technologies, the app offers a fast, native experience across iPhone, iPad, Mac, and Apple Watch. Customize your workflow with widgets, favorites, and seamless Shortcuts integration. Designed for efficiency and clarity, Calndars supports over 30 languages and integrates smoothly into your daily tools—without collecting any personal data. A focused utility for a global world. FEATURES - Calndars is the best app to converts dates between the most used calendars in the world. - Select a calendar to set a date, and get the corresponding date in another calendar. - Copy the date to use it in another app. - Add a calendar to the favourites by tapping the star. - Add a calendar to the widgets by tapping the 4 squares icon. - Calendars can be reordered in the list. INTEGRATION - The app supports small, medium and large widgets. - Create a Shortcut in the Apple's Shortcuts App and use the Shortcut everywhere. - Use AppleScript on MacOS for integration between Calndars and other Apps. CALENDARS Calendars to convert between are: - Buddhist - Chinese - Coptic - Ethiopic (Amete Alem) - Ethiopic (Amete Mihret) - Gregorian - Hebrew - indian - Islamic Civil - Islamic Tabular - Islamic Umm Al Qura - Japanese - Persian - Taiwanese - Bangla - Gujarati - Kannada - Malayalam - Marathi - Odia - Tamil - Telugu - Vikram - Dangi - Vietnamese PLATFORM OR DEVICES - iPhone - iPad - Mac - AppleWatch.

About

Messo

Features
Read full description

Messo is a simple to-do list, task manager, and notes app that helps you organize everyday tasks in one clean, flexible space. Create to-do lists, add tasks, track important dates, and keep notes together — without switching between multiple apps. Use spaces to separate your work, personal life, and important events, so everything stays clear and focused. Stay organized with to-dos and tasks Create simple to-do lists and individual tasks Check items off and track progress at a glance Focus on what needs to be done today Organize everything in spaces Separate work, personal tasks, and events Keep related items together in one view Switch between spaces as your priorities change Available widgets Messo lets you add different widgets to each space: To-Do — simple checklists for everyday tasks Task — individual tasks with progress tracking Countdown — track birthdays, events, and deadlines Time Since — see how much time has passed since an important date Notes — write quick thoughts and reminders Clock — view the current time for selected locations Clean and distraction-free Minimal design that’s easy to scan No complex setup or unnecessary features Designed for clarity and daily use Messo is ideal if you’re looking for a lightweight to-do app that combines tasks, lists, countdowns, time tracking, and notes in one simple workspace.

Screenshots

Calndars4 screens
Messo4 screens

Verdict

The call

The clearest difference is price: Messo at Free against Calndars's $3.99. Messo also leads on update cadence (every 4 days vs every 5 weeks) and iOS requirement (17.6 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Messo is free to download; Calndars costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Calndars ships an update every 5 weeks, Messo every 4 days. The most recent releases landed on October 6, 2026 and October 9, 2026 respectively.

Scorecard3 real differences · 6 level
Calndars versus Messo: the parameters behind the verdict, then further details
ParameterCalndarsMesso
Price$3.99Free — better
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 5 weeksEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS26.017.6 — better
Further details — not scored
Size6 MB81 MB
Age rating4+4+
DeveloperGeert JadoulStas Morozov

In-app purchases

None

Calndars

No in-app purchases

None

Messo

No in-app purchases

Questions

Is Calndars free?
Calndars costs $3.99, with no in-app purchases.
Is Messo free?
Messo is free to download, with no in-app purchases.
Do Calndars or Messo have ads?
Neither Calndars nor Messo shows ads.
Which is updated more often, Calndars or Messo?
Calndars ships an update every 5 weeks, and Messo every 4 days. Most recently, Calndars was updated on October 6, 2026 and Messo on October 9, 2026.

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