Comparison

Calndars vs Rizno

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

Rizno

Features
Read full description

Stay organized like never before - your ultimate to-do calendar app! Plan smarter, live better. Whether you're managing personal goals, school assignments, or team tasks, our powerful to-do calendar app helps you stay on track with simplicity and style. Smart Task Creation - Add tasks with a title and description - Set tasks to repeat daily or on specific weekdays, for as long as you need - Organize tasks by categories and browse a full category list Quick Add with Voice - Use speech-to-text to instantly create tasks - Automatically detects title, start and end times, and date from your voice - Customize the main add button to switch between text or voice input Calendar Sync & Event Integration - Sync all your calendars in one place — including your Apple Calendar and work and personal calendars from your email accounts — birthday events from your contacts automatically appear in the calendar. - You can choose which calendar sources appear in the app and easily hide any source from App Settings while keeping others visible. - Customize calendar source names and colors inside the app without affecting the original calendar settings. - Events are view-only inside the app. - Convert any event into an editable app task and move it to any category you choose. Bilingual Support - Fully supports English and Arabic Search and Smart Timetable - Easily search for any task by title or category - Visual timetable view - tap a time slot to add a task instantly - Show or hide the timetable as you prefer - Navigate easily through months and years Never Miss a Task - Set reminders at the task time or up to 24 hours before - Incomplete tasks are always shown on the homepage so you never miss a thing Widget and Sharing - Home screen widget shows today's tasks at a glance - Share tasks as images with your team, classmates, family, or friends Flexible Task Management - Duplicate tasks and assign different times or dates - Mark tasks complete with your own custom strikethrough style - Change task status and track your progress iCloud Sync - Your tasks are safely backed up and synced across all your Apple devices * By using this app, you agree to our Terms of Use, which can be found at the link below: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Calndars4 screens
Rizno4 screens

Verdict

The call

The clearest difference is price: Rizno at Free against Calndars's $3.99. Rizno also leads on iOS requirement (17.6 vs 26.0). Calndars's advantage is in-app purchases (none vs 2) and ads (none vs shown). On update cadence 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

Rizno is free to download; Calndars costs $3.99 up front. Rizno sells 2 in-app purchases, starting at $0.99 per 7 days. Calndars asks for nothing beyond the download.

UpkeepUpdate frequency

Calndars ships an update every 5 weeks, Rizno every 2 months. The most recent releases landed on October 6, 2026 and October 18, 2026 respectively.

Scorecard4 real differences · 5 level
Calndars versus Rizno: the parameters behind the verdict, then further details
ParameterCalndarsRizno
Price$3.99Free — better
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 5 weeks — betterEvery 2 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS26.017.6 — better
Further details — not scored
Size6 MB12 MB
Age rating4+4+
DeveloperGeert JadoulAsmaa Almarrikhi

In-app purchases

None

Calndars

No in-app purchases

2 purchases

Rizno

Subscriptions2
  • Weekly Plan - $0.99/week7 Days trial$0.997 Days
  • Monthly Plan - $2.99/mo7 Days trial$2.991 Month

Questions

Is Calndars free?
Calndars costs $3.99, with no in-app purchases.
Is Rizno free?
Rizno is free to download, with in-app purchases available.
Do Calndars or Rizno have ads?
Rizno shows ads; Calndars does not.
Which is updated more often, Calndars or Rizno?
Calndars ships an update every 5 weeks, and Rizno every 2 months. Most recently, Calndars was updated on October 6, 2026 and Rizno on October 18, 2026.

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