Comparison

One Tasks vs Calendar Pro+

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

Head to head
About

One Tasks

Organize your life with a powerful task manager that syncs across devices. Create detailed to-do lists with subtasks, set deadlines, and receive timely reminders. Leverage widgets for quick access and integrate with popular calendar and task services.

Highlights
  • Subtask creation
  • Due dates and reminders
  • Widget support
  • Google Tasks sync
  • Outlook/Office 365 sync
  • iCloud Reminders sync
  • CalDAV provider integration
Features
Read full description

Stay on top of every task, anywhere. Seamlessly manage your to-do lists with the app trusted by millions — complete with subtasks, due dates, reminders, and handy widgets. Sync effortlessly with Google Tasks, Outlook, Office 365, iCloud Reminders, and One Calendar. Prefer more control? The app also integrates with any 3rd-party CalDAV providers, giving you full ownership of your data.

About

Calendar Pro+

This app offers a streamlined and intuitive way to manage your schedule, tasks, and events. It features smart reminders, multiple calendar views, and color-coding to help you stay organized and focused on what matters.

Highlights
  • Streamlined design
  • Context-aware long press menus
  • Smart reminders
  • Multiple calendar views (Day, Week, Month, List, Year)
  • Now and Next Home Screen widget
  • Color-coded calendars
  • Time-zone aware scheduling
Features
Read full description

Calendar Pro+ is the smarter, cleaner, more intuitive way to take control of your time. Whether you're juggling work, family, travel, or personal goals, Calendar Pro+ helps you stay organized with clarity and confidence. Why You'll Love It Beautiful, streamlined design that makes your schedule feel lighter, not louder Day, Event and Task long press menus that are context aware. Gives you the information and actions you need at your fingertips Smart reminders that keep you ahead of deadlines without overwhelming you Powerful views — Day, Week, Month, List AND a full calendar year*! — all crafted for quick scanning A Now and Next widget for your Home Screen Color-coded calendars for effortless separation of work, personal, and shared plans Time-zone aware scheduling for travelers and remote teams Built for Real Life From planning your week to tracking birthdays, appointments, workouts, and everything in between, Calendar Pro+ adapts to your rhythm. It's fast, reliable, and thoughtfully designed to help you focus on what matters. * Year view is only available on tablets and desktops, sorry! End User Licence Agreement https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

One Tasks4 screens
Calendar Pro+4 screens

Verdict

The call

The clearest difference is in-app purchases: One Tasks at none against Calendar Pro+'s 4. One Tasks also leads on ratings volume (257 vs 4) and device support (4 vs 2). Calendar Pro+'s advantage is update cadence (weekly vs every 4 weeks) and rating (5.0 vs 4.8). On price, ads and iOS requirement 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. Calendar Pro+ sells 4 in-app purchases, starting at $0.99 per month. One Tasks asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Calendar Pro+ holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: One Tasks has 257 ratings behind it against 4, so its average is the more settled of the two.

UpkeepUpdate frequency

One Tasks ships an update every 4 weeks, Calendar Pro+ weekly. The most recent releases landed on September 21, 2026 and September 19, 2026 respectively.

Scorecard6 real differences · 4 level
One Tasks versus Calendar Pro+: the parameters behind the verdict, then further details
ParameterOne TasksCalendar Pro+
PriceFreeFree
Rating4.8 (257 ratings)5.0 (4 ratings) — better
Positive reviews88.9% of reviews—
Number of ratings257 — better4
Update frequencyEvery 4 weeksWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS15.0 — better16.0
Further details — not scored
Size60 MB51 MB
Age rating12+4+
DeveloperCode Sparkjohnhair.com

Customer experience

One Tasks

All ratings257 ratings
Positive96.5%
Neutral2.7%
Negative0.8%
Written reviews9 reviews
Positive88.9%
Neutral11.1%
Negative0.0%

Calendar Pro+

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

One Tasks

No in-app purchases

4 purchases

Calendar Pro+

Subscriptions3
  • Monthly Subscription3 Days trial$0.991 Month
  • Quarterly Subscription3 Days trial$1.993 Months
  • Annual Subscription7 Days trial$4.991 Year
One-time1
  • All Features, Forever$9.99

Questions

Is One Tasks free?
One Tasks is free to download, with no in-app purchases.
Is Calendar Pro+ free?
Calendar Pro+ is free to download, with in-app purchases available.
Which has better reviews, One Tasks or Calendar Pro+?
Calendar Pro+ is rated higher. One Tasks averages 4.8 out of 5 from 257 ratings, while Calendar Pro+ averages 5.0 from 4 ratings.
Do One Tasks or Calendar Pro+ have ads?
Neither One Tasks nor Calendar Pro+ shows ads.
Which is updated more often, One Tasks or Calendar Pro+?
One Tasks ships an update every 4 weeks, and Calendar Pro+ weekly. Most recently, One Tasks was updated on September 21, 2026 and Calendar Pro+ on September 19, 2026.

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