Comparison

2Do Legacy Edition vs Tasks+Cal+Sync 4

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

Head to head
About

2Do Legacy Edition

This app offers a flexible and powerful way to manage your tasks, checklists, and projects. It adapts to your workflow with a simple interface, allowing you to organize and prioritize what matters most. Features include custom lists, smart lists, and batch editing.

Highlights
  • Create simple tasks, checklists, and projects
  • Multiple alarms and flexible repeating options
  • Organize tasks with lists, groups, and smart lists
  • Password protection for app or individual lists
  • Batch editing and task sharing
  • Sync across devices via Dropbox, CalDAV, and more
  • Email to task integration
Features
Read full description

IMPORTANT - 2Do v4 is here. You are looking at the old, legacy version of 2Do. Please visit: https://apps.apple.com/app/2do-todos-tasks-notes/id1470214600 "2Do adapts to my needs, not the other way around. 2Do gets me."- Macstories 2Do lets you take a completely different approach to managing your tasks. With its extremely simple-to-use interface and a comprehensive and flexible set of powerful features, it lets you focus on what's most important to you: your life. There is no wrong way of using 2Do, and unlike other to-do apps, it won't force you in adhering to a particular task management methodology. AWARDS • Macstories: App of the Year 2015 • Apple - App of the week, June 2015 • Apple - Mac App Store “Best of 2013” • “Best App Ever Awards” Winner • Cult Of Mac - 5/5 • Gizmodo "Best app for forgetful people" - Gold Medal PLUGINS: Email to 2Do: Optional plugin that allows you to integrate your email address directly with 2Do, thus allowing you to email yourself tasks from anywhere. You can even use automation, such as IFTTT, to add reminders to your list. SYNC • Stay in sync using one of the following: Dropbox, Reminders (CalDAV), Toodledo, Fruux (CalDAV), Calendar Server (CalDAV), ownCloud (CalDAV), SabreDAV (CalDAV) or a 3rd party CalDAV Server of choice. • Using Reminders CalDAV sync enables Siri • Periodic automatic backups are created for you (compatible with 2Do for Mac) for a rainy day. • Automatic Push sync between devices SIMPLE TASKS, CHECKLISTS & PROJECTS • Create simple tasks, or checklists and projects with sub-tasks. Tasks can have notes, attachments and multiple alarms. • Set any task to repeat using a flexible set of options. • Assign multiple alerts / reminders PASSWORD PROTECTION • Set a lock to the whole app or individual lists LIST GROUPS, LISTS, INBOX & SMART LISTS • In addition to built-in Focus lists that allow you to conveniently view upcoming, starred or scheduled tasks, you can create multiple lists to manage and organize your tasks. • Built-in support for GTD Inbox • Smart lists let you harness the true potential of 2Do using a number of search options, filters and search pre-sets. Using Smart Lists, you can create custom views of your tasks and use them to focus-in or find frequently managed tasks. 
 PINCH ZOOMING • Control the amount of information you wish to see with a simple pinch-to-zoom gesture, from single line titles to multiple lines of titles, notes and tags.
 BATCH EDITING & SHARING • Drag & Drop support to move tasks between lists or drop on calendar to defer • Batch tagging, starring, marking tasks done and more • Task Sharing via AirDrop, iMessage and Email REIMAGINED TASK EDITOR & QUICK ADD • With focus on switching between editors effortlessly using a single tap only, you’ll save dozens of taps and swipes when editing your tasks. • Save your thoughts as they come to you, by using Quick Add (Tap-hold on [+]) • X-callback-url support TAGS • Manage tags from a dedicated Tags Panel • Organize your tags within groups • Leverage the powerful integration of Tags & Smart Lists to filter on frequently managed tasks. 
• Find Used vs. Unused tags YOUR TASKS UNLIMITED • Set a Start Date to hide tasks from a list before they're relevant and add Duration to put an estimate on the amount of time you’ll be spending on your task • Add an action to call, write an email or trigger a URL Scheme right from 2Do • Attach an image or a voice note to your tasks • Customizations for time management • Use as an events / party planner, or an effective birthday reminder • Desktop-class Task Manager ALERTS • Attach multiple alerts to each task • Attach locations to tasks and get nearby alerts as you approach assigned locations DESKTOP-CLASS IPAD APP • Everything from Tasks to Calendar Events - all managed from the same screen. • Manage calendar events and schedules • Split-screen support • Keyboard shortcuts

About

Tasks+Cal+Sync 4

This app synchronizes contacts, tasks, and calendars using the SyncML standard. It's designed for users who need to connect with older systems or specific organizational requirements that rely on this legacy synchronization technology.

Highlights
  • SyncML synchronization for contacts, tasks, and calendars
  • App-internal calendar and task management
  • iOS contact group assignment
  • Acts as a local SyncML server
  • Month, day, week, and list calendar views
Features
Read full description

Please read the following desciption before buying this app! Tasks+Cal+Sync 4 is a niche app, suitable only when you need synchronizing contacts, tasks and calendar with a server or service which uses a standard called SyncML. The app does not support any other synchronisation technology! So please buy this app only if you know for sure that SyncML-based synchronisation is really what you need! This may be the case when the IT people of your organisation say so, and maybe even explicitly recommend using Tasks+Cal+Sync to synchronize calendars, tasks and contacts. In any case, please realize that for using this app, you need to know the URL of your syncml server, the login user to use, and the so called server paths for contacts/tasks/calendar. Only the provider of the SyncML service knows these details and can support you in establishing sync with his SyncML server. We as makers of the SyncML client app cannot! By now, SyncML is a legacy standard. It was invented in 2000, and many of that time's feature phones did support it. Since then, it has been largely superseded by other technologies, most notably CalDAV and CardDAV, which iOS supports out of the box without any extra app. But SyncML still exists, and for some older calendaring systems, it may be the only way to synchronize. For those cases, Tasks+Cal+Sync 4 exists. Tasks+Cal+Sync 4 is a rework of the former Tasks+Cal+Sync app, to allow using SyncML on iOS 10 and later (the original Tasks+Cal+Sync app only works up to iOS 9). But please note that Tasks+Cal+Sync 4 does not provide new features over the original Tasks+Cal+Sync - except for a contact list view with a way to easily assign contacts to groups. Otherwise Tasks+Cal+Sync 4 just carries the original Tasks+Cal+Sync functionality forward to make it usable with iOS10 and later. So now that you are certain SyncML based synchronisation is what you need - here's the summary for Tasks+Cal+Sync 4: • based on a mature and extensively interoperability tested SyncML engine, which powers many SyncML client and server products for different platforms (libsynthesis). • synchronizes app-internal calendar (not the iOS calendar! If you want that, have a look at "SyncML PRO 4"), app-internal tasks (not iOS reminders!) and iOS contacts to a SyncML compliant server or service in the internet or in the local network. • can act as SyncML server in the local WiFi network (e.g. to keep really old mobiles in sync with an iOS device) • has built-in tasks, month, day, week and list views for the iOS calendar (same as in original Tasks+Cal+Sync) • has a contacts list for the iOS contacts, and allows quickly assigning/removing contact group membership (that's a new feature in Tasks+Cal+Sync 4) Please visit the plan44.ch web page (see support link below) for support and FAQ, as well as documentation for download.

Screenshots

2Do Legacy Edition4 screens
Tasks+Cal+Sync 44 screens

Verdict

The call

The clearest difference is rating: 2Do Legacy Edition at 4.7 against Tasks+Cal+Sync 4's 1.0. 2Do Legacy Edition also leads on update cadence (every 3 weeks vs every 20 months) and ratings volume (3.7K vs 2). Tasks+Cal+Sync 4's advantage is in-app purchases (none vs 3) and iOS requirement (10.0 vs 17.6). On ads 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

2Do Legacy Edition costs $9.99 and Tasks+Cal+Sync 4 $14.99 up front. 2Do Legacy Edition sells 3 one-off in-app purchases. Tasks+Cal+Sync 4 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

2Do Legacy Edition holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: 2Do Legacy Edition has 3.7K ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

2Do Legacy Edition ships an update every 3 weeks, Tasks+Cal+Sync 4 every 20 months. The most recent releases landed on September 28, 2026 and July 4, 2026 respectively.

Scorecard7 real differences · 3 level
2Do Legacy Edition versus Tasks+Cal+Sync 4: the parameters behind the verdict, then further details
Parameter2Do Legacy EditionTasks+Cal+Sync 4
Price$9.99 — better$14.99
Rating4.7 (3.7K ratings) — better1.0 (2 ratings)
Positive reviews82.7% of reviews—
Number of ratings3.7K — better2
Update frequencyEvery 3 weeks — betterEvery 20 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS17.610.0 — better
Further details — not scored
Size96 MB8 MB
Age rating4+4+
DeveloperBeehive Innovations ServicesLukas Zeller

Customer experience

2Do Legacy Edition

All ratings3,722 ratings
Positive93.1%
Neutral2.8%
Negative4.1%
Written reviews2,029 reviews
Positive82.7%
Neutral6.6%
Negative10.7%

Tasks+Cal+Sync 4

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

2Do Legacy Edition

Reported bugs

4 issues
  • Crashes after recent update
  • Repeating tasks not working correctly
  • Unable to add new tasks in some cases
  • Sync issues between devices

Requested features

6 requests
  • Dark mode option
  • Native calendar integration
  • Improved Apple Watch support
  • Easier task prioritization
  • Better email integration
Show 1 more
  • Shared task lists

Tasks+Cal+Sync 4

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

2Do Legacy Edition

One-time3
  • Email to 2Do Plus$1.99
  • Email to 2Do$1.99
  • Email to 2Do$3.99
None

Tasks+Cal+Sync 4

No in-app purchases

Questions

Is 2Do Legacy Edition free?
2Do Legacy Edition costs $9.99, and also offers in-app purchases.
Is Tasks+Cal+Sync 4 free?
Tasks+Cal+Sync 4 costs $14.99, with no in-app purchases.
Which has better reviews, 2Do Legacy Edition or Tasks+Cal+Sync 4?
2Do Legacy Edition is rated higher. 2Do Legacy Edition averages 4.7 out of 5 from 3.7K ratings, while Tasks+Cal+Sync 4 averages 1.0 from 2 ratings.
Do 2Do Legacy Edition or Tasks+Cal+Sync 4 have ads?
Neither 2Do Legacy Edition nor Tasks+Cal+Sync 4 shows ads.
Which is updated more often, 2Do Legacy Edition or Tasks+Cal+Sync 4?
2Do Legacy Edition ships an update every 3 weeks, and Tasks+Cal+Sync 4 every 20 months. Most recently, 2Do Legacy Edition was updated on September 28, 2026 and Tasks+Cal+Sync 4 on July 4, 2026.

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