Comparison

Calendar ToDo vs Studirum

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

Head to head
About

Calendar ToDo

Features
Read full description

Turn your calendar events into a progress log you can review later. Calendar ToDo reads your calendar events and lets you record completion, progress, and reflection inside the appβ€”without creating, editing, or deleting your calendar events. Because Calendar ToDo works with events shown in Apple’s Calendar app, you can use calendars from iCloud, Google Calendar, Outlook, and other accounts synced to your iPhone. Tap the Done button on the right to record completion immediately. Touch and hold an event to record progress. You can then select a reflection to save the reflection and completion as well. Progress is context for reflection and does not mark an event as Done by itself. Events saved as Done appear in the same completion records, graphs, and reports as before. On supported devices and languages, Apple Intelligence assists on-device event classification and Weekly Report insights. When Apple Intelligence is unavailable, completion, reflection, and category review and correction remain available. Key Features - On supported devices, Apple Intelligence assists event classification - View events from Apple Calendar, iCloud, Google Calendar, and Outlook without editing them - Check events and progress from the Monthly Calendar - Browse months and expand a week in a larger Home Screen calendar widget to see events and completion status, then open a selected day in the app - See adjacent completed dates in multi-day events as a continuous completion band - Review completion history and the next two weeks of schedule changes with a small or medium Home Screen Heatmap widget - Browse today's events and mark them Done with one tap - Touch and hold an event to record progress and reflection - Review and correct each event's category from event details - Review schedule load, outcomes, progress, and reflections in the Report section of Analytics - Get end-of-event reminders with Done and 1-hour snooze actions - Notice schedule changes such as new events, time shifts, and missing routines - Sync completion and progress records across devices with iCloud Calendar ToDo is for people who already plan with a calendar and want a simple way to look back on what they completed, how far they progressed, and how the week went. Some features, including detailed reviews of past weeks, are available with Calendar ToDo Plus (monthly or yearly). Eligible subscribers may receive a 1-month free trial with the monthly plan. Official Website: https://calendartodo.app/en/ Terms of Use: https://calendartodo.app/en/terms/ Privacy Policy: https://calendartodo.app/en/privacy/

About

Studirum

Features
Read full description

Transform your study habits with Studirum: Study & Focus Timer. Designed with the motto "The Smartest Way to Study," Studirum is much more than a simple timer; it is your comprehensive digital study assistant tailored to help you reach your goals. Whether you are preparing for a tough exam or trying to organize your daily tasks, Studirum helps you focus, tracks your progress, and keeps your motivation at its peak. Focus. Track. Achieve Together! HIGHLIGHTED FEATURES: Advanced Pomodoro & Focus Timer Step away from distractions and work deeply. Seamlessly manage your study and break cycles with customizable Pomodoro durations and special notification sounds (success, break, alarm). Smart Task Management (To-Do List) Break your goals down into small, manageable pieces. Categorize your tasks into Daily, Weekly, and Monthly. Make the most of your time by tracking the remaining time for each task instantly. Daily Rhythm & Custom Reminders Build a solid study routine! Set independent daily, weekly, or monthly reminders to establish your personal study rhythm. Choose your favorite reminder sound and stay consistent. Remember: Studying at the same time every day increases focus by 40%! Detailed Statistics & Progress Tracking (Track) "You can't manage what you don't measure." Studirum turns your study sessions and completed goals into detailed charts. See how productive you are each day and step closer to your goals without breaking your study streaks. Achieve Together You don't have to study alone. Feel the power of the community behind you on the way to your goals with social features that will boost your motivation. Customizable Themes & Dark Mode Personalize your digital workspace. Boost your motivation by choosing from vibrant themes like Blue-Orange, Green-Purple, Pastel, or switch to the eye-friendly Dark Mode for late-night study sessions. WHY STUDIRUM? With its user-friendly, modern, and focus-driven interface, it not only gets you to sit at your desk but ensures you stay there productively. Add your tasks, start the timer, and see the difference without wasting time on complex settings. Download Studirum now to study smarter and unlock your potential!

Screenshots

Calendar ToDo4 screens
Studirum4 screens

Verdict

The call

The clearest difference is in-app purchases: Studirum at none against Calendar ToDo's 2. Studirum also leads on iOS requirement (15.1 vs 26.0). Calendar ToDo's advantage is update cadence (weekly vs monthly). On price, ads and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Calendar ToDo sells 2 in-app purchases, starting at $1.99 per month. Studirum asks for nothing beyond the download.

UpkeepUpdate frequency

Calendar ToDo ships an update weekly, Studirum monthly. The most recent releases landed on October 3, 2026 and October 2, 2026 respectively.

Scorecard3 real differences Β· 3 level
Calendar ToDo versus Studirum: the parameters behind the verdict, then further details
ParameterCalendar ToDoStudirum
PriceFreeFree
Update frequencyWeekly β€” betterMonthly
AdsNoNo
In-app purchasesYesNo β€” better
DevicesiPhone, iPadiPhone, iPad, iPod β€” better
Requires iOS26.015.1 β€” better
Further details β€” not scored
Size14 MB54 MB
Age rating4+4+
DeveloperYugo OkugawaOmer Aslan

In-app purchases

2 purchases

Calendar ToDo

Subscriptions2
  • Calendar ToDo Plus Monthly1 Month trial$1.991 Month
  • Calendar ToDo Plus Annual1 Year trial$14.991 Year
None

Studirum

No in-app purchases

Questions

Is Calendar ToDo free?
Calendar ToDo is free to download, with in-app purchases available.
Is Studirum free?
Studirum is free to download, with no in-app purchases.
Do Calendar ToDo or Studirum have ads?
Neither Calendar ToDo nor Studirum shows ads.
Which is updated more often, Calendar ToDo or Studirum?
Calendar ToDo ships an update weekly, and Studirum monthly. Most recently, Calendar ToDo was updated on October 3, 2026 and Studirum on October 2, 2026.

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