Task Calendar vs WhenNote
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Task Calendar
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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. β 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. β Unlimited Calendar Scrolling Scroll vertically to instantly jump to any month, past or future. No need for annoying buttons to move between months! β View All Calendars at Once Combine every tab's calendar into a single, unified view. No more switching back and forth between tabs! β Sorting Freely reorder tasks by dragging, or sort them alphabetically and more. β Unlimited Tabs Create as many calendars as you like for categories such as "Work," "Study," and "Personal." There's no limit! β Powerful Search Instantly find the task you need by filtering all your tasks by date range or keyword. β Tasks Without a Date Create tasks that aren't tied to a specific date. Perfect for tasks whose date hasn't been decided yet! β Notifications Send yourself notifications at any time with any message you like, so you never forget a task. β Dark Mode Choose your theme from Light Mode, Dark Mode, or automatic switching based on your device settings. β Custom Background Colors Change the background color of each tab to any color you like. β Archive Hide any calendars you don't want to see. β Biometric Authentication Supports Face ID and Touch ID, keeping your important records safely protected. β Security Your data is stored only on your device and is never sent to any third party. β No Login Required Start using the app right away without any login. β Offline Support Works even when you're not connected to the internet. β Privacy Policy naokiotsu.com/privacy-policy β 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
WhenNote
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WhenNote keeps important dates clear and easy to revisit. Organize meaningful events in flexible notebooks, understand how much time has passed or remains, and handle everyday date calculations in one focused app. Features: β’ Organize dates into separate notebooks β’ Record names, descriptions, start dates, and end dates β’ See elapsed, upcoming, and remaining time at a glance β’ Calculate and total date intervals β’ Add or subtract years, months, days, hours, and minutes β’ Reorder notebooks and entries to match your workflow β’ Optionally back up and restore through your private Google Drive app-data area β’ Use the app in English, Traditional Chinese, or Japanese Your notes are stored on your device by default. When Google Drive backup is enabled, WhenNote requests access only to its own hidden app-data areaβnot your other Drive files. No ads. No tracking. No unnecessary account required.
Screenshots
Verdict
Task Calendar and WhenNote are too close to call on the numbers: across 6 compared parameters β price, update cadence, ads and in-app purchases among them β neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Task Calendar ships an update every 4 weeks, WhenNote fortnightly. The most recent releases landed on September 23, 2026 and September 14, 2026 respectively.
| Parameter | Task Calendar | WhenNote |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 weeks | Fortnightly β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod β better | iPhone, iPod |
| Requires iOS | 15.1 | 15.0 β better |
| Further details β not scored | ||
| Size | 44 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | naoki otsu | Hank Wang |
In-app purchases
Task Calendar
No in-app purchases
WhenNote
No in-app purchases









