Comparison

Diary AI vs Task Calendar

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

Head to head
About

Diary AI

Features
Read full description

Extract handwritten notes from a notebook or planner into your computer or mobile device with the Diary AI App. - On device processing Text recognition on-device AI, no lookup on cloud AI. - Text export Quickly export recognized text into note-taking apps such as Notes and Freeform.

About

Task Calendar

Organize your life by writing and editing tasks directly on a monthly calendar. View all your commitments at a glance, with unlimited tabs, sorting, and customizable themes. Keep your data secure with offline support and biometric authentication.

Highlights
  • Task management on a monthly calendar
  • Unlimited tabs for categories
  • Task sorting and reordering
  • Tasks without specific dates
  • Notifications for reminders
  • Dark mode and custom background colors
  • Biometric authentication for security
Features
Read full description

Task Calendar is a task management app that lets you write down and edit tasks right on your calendar. It's packed with features such as task management on a monthly calendar, unlimited tabs, sorting, tasks without a date, notifications, dark mode support, and more. โ–  Manage Tasks on a Monthly Calendar Write tasks directly onto a monthly calendar, so you can see everything you need to do each month at a glance. โ–  Unlimited Calendar Scrolling Scroll vertically to instantly jump to any month, past or future. No need for annoying buttons to move between months! โ–  View All Calendars at Once Combine every tab's calendar into a single, unified view. No more switching back and forth between tabs! โ–  Sorting Freely reorder tasks by dragging, or sort them alphabetically and more. โ–  Unlimited Tabs Create as many calendars as you like for categories such as "Work," "Study," and "Personal." There's no limit! โ–  Powerful Search Instantly find the task you need by filtering all your tasks by date range or keyword. โ–  Tasks Without a Date Create tasks that aren't tied to a specific date. Perfect for tasks whose date hasn't been decided yet! โ–  Notifications Send yourself notifications at any time with any message you like, so you never forget a task. โ–  Dark Mode Choose your theme from Light Mode, Dark Mode, or automatic switching based on your device settings. โ–  Custom Background Colors Change the background color of each tab to any color you like. โ–  Archive Hide any calendars you don't want to see. โ–  Biometric Authentication Supports Face ID and Touch ID, keeping your important records safely protected. โ–  Security Your data is stored only on your device and is never sent to any third party. โ–  No Login Required Start using the app right away without any login. โ–  Offline Support Works even when you're not connected to the internet. โ–  Privacy Policy naokiotsu.com/privacy-policy โ–  Contact If you have any requests or questions, feel free to reach out through the in-app contact form or the email address below. info@naokiotsu.com

Screenshots

Diary AI2 screens
Task Calendar4 screens

Verdict

The call

The clearest difference is price: Task Calendar at Free against Diary AI's $0.99. Task Calendar also leads on update cadence (weekly vs every 16 months) and iOS requirement (15.1 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Task Calendar is free to download; Diary AI costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Diary AI ships an update every 16 months, Task Calendar weekly. The most recent releases landed on October 30, 2026 and November 4, 2026 respectively.

Scorecard3 real differences ยท 5 level
Diary AI versus Task Calendar: the parameters behind the verdict, then further details
ParameterDiary AITask Calendar
Price$0.99Free โ€” better
Positive reviewsโ€”100.0% of reviews
Update frequencyEvery 16 monthsWeekly โ€” better
AdsNoNo
In-app purchasesNoNo
Monetizationโ€”Free
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS17.015.1 โ€” better
Further details โ€” not scored
Size3 MB44 MB
Age rating4+4+
DeveloperJuiko Ongnaoki otsu

In-app purchases

None

Diary AI

No in-app purchases

None

Task Calendar

No in-app purchases

Questions

Is Diary AI free?
Diary AI costs $0.99, with no in-app purchases.
Is Task Calendar free?
Task Calendar is free to download, with no in-app purchases.
Do Diary AI or Task Calendar have ads?
Neither Diary AI nor Task Calendar shows ads.
Which is updated more often, Diary AI or Task Calendar?
Diary AI ships an update every 16 months, and Task Calendar weekly. Most recently, Diary AI was updated on October 30, 2026 and Task Calendar on November 4, 2026.

Other comparisons