Comparison

ToDo Calendar Pro vs OneTodo

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

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.

Highlights
  • 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
Features
Read full description

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

ToDo Calendar Pro4 screens
OneTodo4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
ToDo Calendar Pro versus OneTodo: the parameters behind the verdict, then further details
ParameterToDo Calendar ProOneTodo
PriceFreeFree
Rating4.2 (5 ratings) — better2.3 (3 ratings)
Positive reviews20.0% of reviews71.4% of reviews — better
Number of ratings5 — better3
Update frequencyEvery 2 monthsEvery 9 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS17.0 — better17.6
Further details — not scored
Size33 MB140 MB
Age rating17+4+
DeveloperNAOAKI SEKIGUCHIChengdu Reinvent Technology Co., Ltd.

Customer experience

ToDo Calendar Pro

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews10 reviews
Positive20.0%
Neutral10.0%
Negative70.0%

OneTodo

All ratings3 ratings
Positive0.0%
Neutral66.7%
Negative33.3%
Written reviews7 reviews
Positive71.4%
Neutral28.6%
Negative0.0%

In-app purchases

1 purchases

ToDo Calendar Pro

One-time1
  • ToDo Calendar Pro License$1.99
3 purchases

OneTodo

Subscriptions2
  • OneTodo Pro (Monthly)$0.991 Month
  • OneTodo Pro (Yearly)$6.991 Year
One-time1
  • OneTodo Pro (Lifetime)$14.99

Questions

Is ToDo Calendar Pro free?
ToDo Calendar Pro is free to download, with in-app purchases available.
Is OneTodo free?
OneTodo is free to download, with in-app purchases available.
Which has better reviews, ToDo Calendar Pro or OneTodo?
ToDo Calendar Pro is rated higher. ToDo Calendar Pro averages 4.2 out of 5 from 5 ratings, while OneTodo averages 2.3 from 3 ratings.
Do ToDo Calendar Pro or OneTodo have ads?
ToDo Calendar Pro shows ads; OneTodo does not.
Which is updated more often, ToDo Calendar Pro or OneTodo?
ToDo Calendar Pro ships an update every 2 months, and OneTodo every 9 days. Most recently, ToDo Calendar Pro was updated on October 23, 2026 and OneTodo on October 24, 2026.

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