Comparison

CalenGoo Calendar vs One Tasks

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

Head to head
About

CalenGoo Calendar

Access and manage your Google Calendar and iOS calendars with this app. It offers offline access, event synchronization, and advanced features like drag-and-drop event management and task list integration. Customize your calendar views and print your schedule.

Highlights
  • Offline access to calendar data
  • Google Calendar and iOS calendar sync
  • Drag-and-drop event management
  • Event templates for quick creation
  • Print/PDF export of calendar views
  • Google Tasks integration
Features
Read full description

CalenGoo gives you a fast and easy way to access and modify your Google Calendar with your iPhone, iPod Touch or iPad. It can also be used when you have no Internet connection, using the cached data. Changes are saved and uploaded the next time you are connected. The calendar view is similar to the web view of Google Calendar. Events are displayed using the same calendar colors that you use in your Google Calendar, even Google's event colors are supported (please see http://www.calengoo.com/cc ). It also recognizes which calendars are visible and which are hidden. So the view should match the view of your Google Calendar as much as possible. CalenGoo also has a month view similar to that of Google Calendar. It can be zoomed and panned to quickly get an overview over the events of a month. Zooming the month is done by using the two-finger-zoom gesture that you know from Safari and the photo application. A double tap opens the tapped day. It also supports the same kinds of recurrence rules as Google Calendar and displays recurring events correctly even when you are offline or scroll far into the future. You can also use Google Calendar's feature to invite people to events and see their status (accepted, declined, maybe, no answer). They will get an invitation email with links to e.g. accept or decline the invitation. Google Calendar has an integrated task list, called Google Tasks. Tasks with a due date are displayed on the corresponding days of the calendar. CalenGoo can do the same, it can sync this list, display your tasks in the calendar views and in a list view and it even makes your tasks available offline. You can edit and add tasks and the changes will be synced with Google Tasks. You either need a (free) Google Calendar account to use this app or you can use it with your iOS calendars. However using it with Google Calendar has a few advantages. To get more information, screenshots and a tutorial, please go to http://www.calengoo.com If you have any problems or suggestions, please send an email to calengoo@dgunia.de or take a look at CalenGoo's support website to get help. If you think the font is too small and hard to read, you can increase the font size of all calendar views in the settings under "Settings", "Display and Use". Features ( http://www.calengoo.com ): - Drag&drop to quickly copy and move events - Templates to quickly create similar events again. They can even be combined, e.g. one template for the location of an event and another for the attendees - Print/PDF function to print the day, week, month or agenda view via AirPrint or to email it as a PDF file - Supports the same recurrence rules as Google Calendar - Supports Google Calendar's event colors when syncing via OAuth2 - Icons can be assigned to Google Calendar events - Date/time can be entered using the iOS wheels or by using a keypad - Fast search function - Show/edit iOS calendars in addition to Google calendars (or instead of Google calendars) - Sync with Google Tasks and iOS Reminders - Reminders can be snoozed and they can be (optionally) repeated every minute - Birthdays and anniversaries of your contacts can be displayed - Zoomable month view, which can be configured to scroll horizontally (month by month) or vertically (week by week) - Events can be linked to contacts - Floating events and completable events - Photos and PDF files can be created and attached to events (via Google Drive) - Calendar selection bar to quickly show and hide single calendars - The location of an event can be opened with Apple Maps, Google Maps, Navigon, TomTom, Skobbler, Sygic, iGo or Waze - View/edit calendars that are shared with others via Google Calendar - Many configuration options to change the way the app looks and works

About

One Tasks

Manage your to-do lists and tasks with a trusted application. Features include subtasks, due dates, reminders, and widgets. It syncs with popular services like Google Tasks and Outlook, and supports CalDAV for data ownership.

Highlights
  • Subtask management
  • Due dates and reminders
  • Widgets for quick access
  • Sync with Google Tasks, Outlook, Office 365, iCloud Reminders
  • CalDAV provider integration
  • Cross-device support
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.

Screenshots

CalenGoo Calendar4 screens
One Tasks4 screens

Verdict

The call

The clearest difference is price: One Tasks at Free against CalenGoo Calendar's $6.99. One Tasks also leads on rating (4.8 vs 4.6) and update cadence (monthly vs every 2 months). CalenGoo Calendar's advantage is chart position (#169 vs unranked) and iOS requirement (13.0 vs 15.0). On ratings volume, ads, 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

One Tasks is free to download; CalenGoo Calendar costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

One Tasks holds the better App Store score, 4.8 against 4.6. Both are backed by a comparable volume of ratings — 301 and 277 respectively. Written reviews point the same way: 79% of CalenGoo Calendar's written reviews are positive against 91% of One Tasks's.

UpkeepUpdate frequency

CalenGoo Calendar ships an update every 2 months, One Tasks monthly. Both last shipped on November 6, 2026.

Scorecard7 real differences · 4 level
CalenGoo Calendar versus One Tasks: the parameters behind the verdict, then further details
ParameterCalenGoo CalendarOne Tasks
Price$6.99Free — better
Rating4.6 (301 ratings)4.8 (277 ratings) — better
Positive reviews79.4% of reviews90.9% of reviews — better
Number of ratings301 — better277
Update frequencyEvery 2 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#169 — better—
DevicesiPhone, iPad, iPod, Apple WatchiPhone, iPad, iPod, Mac
Requires iOS13.0 — better15.0
Further details — not scored
Size30 MB61 MB
Age rating4+12+
DeveloperDominique Andr GuniaCode Spark

Customer experience

CalenGoo Calendar

All ratings297 ratings
Positive87.5%
Neutral5.4%
Negative7.1%
Written reviews741 reviews
Positive79.4%
Neutral7.6%
Negative13.1%

One Tasks

All ratings276 ratings
Positive96.4%
Neutral2.9%
Negative0.7%
Written reviews11 reviews
Positive90.9%
Neutral9.1%
Negative0.0%

Bugs and requests

CalenGoo Calendar

Reported bugs

3 issues
  • Crashes when editing events
  • Duplicate events after sync
  • Incorrect time zone handling

Requested features

4 requests
  • Dark mode option
  • Improved task management integration
  • Ability to customize event icons
  • Smoother transition between calendar views

One Tasks

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

CalenGoo Calendar

No in-app purchases

None

One Tasks

No in-app purchases

Questions

Is CalenGoo Calendar free?
CalenGoo Calendar costs $6.99, with no in-app purchases.
Is One Tasks free?
One Tasks is free to download, with no in-app purchases.
Which has better reviews, CalenGoo Calendar or One Tasks?
One Tasks is rated higher. CalenGoo Calendar averages 4.6 out of 5 from 301 ratings, while One Tasks averages 4.8 from 277 ratings.
Do CalenGoo Calendar or One Tasks have ads?
Neither CalenGoo Calendar nor One Tasks shows ads.
Which is updated more often, CalenGoo Calendar or One Tasks?
CalenGoo Calendar ships an update every 2 months, and One Tasks monthly. Most recently, CalenGoo Calendar was updated on November 6, 2026 and One Tasks on November 6, 2026.

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