ToDo Calendar Pro vs OneTodo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ToDo Calendar Pro
Manage your tasks efficiently with a calendar view that shows due dates. Sync tasks across all your devices via iCloud and automatically register them to other calendar apps. Attach files, create sub-tasks, and receive timely notifications.
- Calendar task overview
- iCloud task synchronization
- File and photo attachments
- Sub-task creation
- Template-based task registration
- Integration with iOS Calendar and Google Calendar
- Apple Watch task viewing
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Would you like to make your smartphone or tablet PC into a useful business tool? ToDo Calendar Pro is an application to manage your tasks efficiently using a calendar. The calendar shows you an overview of what tasks are due to be performed and when. Tasks are synced to all your devices through iCloud, so you can manage your tasks anytime, anywhere. You can also automatically register tasks to iOS Calendar, iOS Reminder and Google Calendar. ToDo Calendar Pro functions 1. Registering tasks First, let's register your tasks. By setting a scheduled start date and scheduled end date, you will be able to complete your tasks on time. You can fill in detailed information and attach photos, videos, Excel, Word or other files and maps in the tasks. Tasks can also be further divided into sub-tasks. 2. Registering tasks using a template By using pre-registered templates, you can easily register tasks. You can customize the template any way you like. 3. Managing tasks in a calendar You can see your tasks in the calendar. The calendar allows you to see which tasks will be performed when. 4. Managing tasks in a list You can also see the tasks in a list. You can see what tasks are currently being performed, what tasks have been completed, and what tasks will be performed in the future. 5. Organizing tasks in groups If you set up groups for tasks, you can view tasks by group in a calendar or a list. You can customize groups any way you like. 6. Task notifications You can specify the tasks to be notified at the scheduled start date and time or at a specified date and time. With notifications, you'll never forget an important task. 7. Linking iOS Calendar, iOS Reminder and Google Calendar You can set up your tasks to work with iOS Calendar, iOS Reminder, and Google Calendar, so they can be registered to iOS Calendar, iOS Reminder, and Google Calendar. 8. Viewing today’s tasks on Apple Watch You can see a list of tasks to be performed today on your Apple Watch. You can also mark completed tasks as completed.
OneTodo
Organize your life with a hierarchical task management system. Create tasks, pages, projects, boxes, and spaces to structure your to-do list and plans. Track project progress and manage separate data spaces for different aspects of your life.
- Hierarchical task organization (Task > Page > Project > Box > Space)
- Create standalone tasks
- Use pages as project subtitles
- Track project completion progress
- Group projects with boxes
- Separate data spaces for internal accounts
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Your Personal Task System. The Todo Application In The New Era Task -> Page -> Project -> Box -> Space # Todo/Task - add a to-do to your project or box. - tasks can also stand on their own. # Page - add a page to list your to-do plan. - you could use page as project’s subtitle. # Project - add a goal, plan, list as one project. - projects can show completion progress. # Box - add a box to group projects. # Space - stores a separate data space. - as the internal account system of OneTodo. OneTodo offers auto-renewable subscriptions. - Available plans, durations, and localized prices are shown on the purchase screen. Prices may vary by country or region. - Payment will be charged to your Apple Account when you confirm the purchase. - The subscription renews automatically unless you turn off auto-renew at least 24 hours before the end of the current period. - Your Apple Account will be charged for renewal within 24 hours before the end of the current period. - You can manage or cancel subscriptions in your App Store account settings after purchase. - Any unused portion of a free trial, if offered, will be forfeited when you purchase a subscription. Privacy Policy: https://docs.onenice.tech/#/OneTodo/privacy Terms of Service: https://docs.onenice.tech/#/OneTodo/terms Contact us: hi@onenice.tech Twitter: @OneTodoApp
Screenshots
Verdict
The clearest difference is review sentiment: OneTodo at 71% against ToDo Calendar Pro's 20%. OneTodo also leads on ads (none vs shown) and update cadence (every 9 days vs every 2 months). ToDo Calendar Pro's advantage is rating (4.2 vs 2.3) and monetization model (free with in-app purchases vs subscription). On price, ratings volume, 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
Both are free to download. ToDo Calendar Pro sells 1 one-off in-app purchase and OneTodo sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
ToDo Calendar Pro holds the better App Store score, 4.2 against 2.3. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews complicate that: 20% of ToDo Calendar Pro's written reviews are positive against 71% of OneTodo's, so the app with the better star average is not the one people write more warmly about.
ToDo Calendar Pro ships an update every 2 months, OneTodo every 9 days. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | ToDo Calendar Pro | OneTodo |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (5 ratings) — better | 2.3 (3 ratings) |
| Positive reviews | 20.0% of reviews | 71.4% of reviews — better |
| Number of ratings | 5 — better | 3 |
| Update frequency | Every 2 months | Every 9 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases — better | Subscription |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPad |
| Requires iOS | 17.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 33 MB | 140 MB |
| Age rating | 17+ | 4+ |
| Developer | NAOAKI SEKIGUCHI | Chengdu Reinvent Technology Co., Ltd. |
Customer experience
ToDo Calendar Pro
OneTodo
In-app purchases
ToDo Calendar Pro
- ToDo Calendar Pro License$1.99
OneTodo
- OneTodo Pro (Monthly)$0.991 Month
- OneTodo Pro (Yearly)$6.991 Year
- OneTodo Pro (Lifetime)$14.99
Questions
Is ToDo Calendar Pro free?
Is OneTodo free?
Which has better reviews, ToDo Calendar Pro or OneTodo?
Do ToDo Calendar Pro or OneTodo have ads?
Which is updated more often, ToDo Calendar Pro or OneTodo?
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