Comparison

Tasks+Cal+Sync 4 vs Reminders

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

Head to head
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 Since then, it has been largely superseded by other technologies, most notably CalDAV and CardDAV, which iOS supports out of the box without any extra app.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.

About

Reminders

Seamlessly integrate your to-do lists and reminders directly into your calendar app. Organize your day with a structured planner and home screen widgets for quick access. Enjoy offline syncing and robust privacy protection.

Highlights
  • Calendar integration
  • Home screen widgets
  • Structured day planner
  • Offline syncing
  • Siri integration
  • Customizable sync schedules
Read full description

Keep using the Reminders and Calendar apps that you know and love - now with seamless integration. Effortlessly view your reminders directly within the Calendar app, enhancing your productivity and organisation. Stay organized effortlessly with the to do list widget, your go-to tool for quick task tracking and reminders—access your to do list widget right from your home screen and stay on top of everything. Plan every hour with precision using our structured day planner, helping you break down goals into manageable steps with a clear, visual structured day planner layout. Build the perfect schedule for productivity and balance—edit your schedule in real time and sync tasks from your structured day planner directly into your daily schedule. Sync when you want inside the app, or schedule your own syncing patterns in Shortcuts. From every time you exit Reminders, to when you charge your device, you can be in charge of the syncing schedule to suit your needs with support for Shortcut Automations. Prefer to control things manually? You can do so even more effortlessly using Siri or interactive Home Screen widgets. Want to hide some reminders from Calendar? Add $nocal or $nocalendar to the title or notes of your reminder so that you stay in control of what appears in Calendar. All syncing is done offline, on your device. No cloud servers are used and no data ever leaves your device, so your privacy is always protected. Verify for yourself by running the app whilst in Airplane Mode. Want to take advantage of this app on other devices? If you use an iCloud, calDAV or Exchange calendar, your reminders will already be synced to your calendar on all your other devices. If you prefer to store your calendars locally, this app is available on all your other devices: iPhone, iPad, Mac and Apple Vision Pro. Terms of use: https://zipoapps.com/remindertocalios/terms/ Privacy policy: https://zipoapps.com/remindertocalios/privacy/

Screenshots

Tasks+Cal+Sync 44 screens
Reminders4 screens

Verdict

The call

The clearest difference is price: Reminders at Free against Tasks+Cal+Sync 4's $14.99. Reminders also leads on rating (4.5 vs 1.0) and update cadence (every 6 weeks vs every 20 months). Tasks+Cal+Sync 4's advantage is in-app purchases (none vs 16) and ads (none vs shown). On 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

Reminders is free to download; Tasks+Cal+Sync 4 costs $14.99 up front. Reminders sells 16 in-app purchases, starting at $0.99 per 7 days. Tasks+Cal+Sync 4 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Reminders holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: Reminders has 96 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Tasks+Cal+Sync 4 ships an update every 20 months, Reminders every 6 weeks. The most recent releases landed on October 16, 2026 and October 20, 2026 respectively.

Scorecard8 real differences · 2 level
Tasks+Cal+Sync 4 versus Reminders: the parameters behind the verdict, then further details
ParameterTasks+Cal+Sync 4Reminders
Price$14.99Free — better
Rating1.0 (2 ratings)4.5 (96 ratings) — better
Positive reviews—52.4% of reviews
Number of ratings296 — better
Update frequencyEvery 20 monthsEvery 6 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, Mac, Vision Pro — better
Requires iOS10.0 — better16.0
Further details — not scored
Size8 MB99 MB
Age rating4+4+
DeveloperLukas ZellerZipoApps

Customer experience

Tasks+Cal+Sync 4

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

Reminders

All ratings82 ratings
Positive86.6%
Neutral6.1%
Negative7.3%
Written reviews63 reviews
Positive52.4%
Neutral9.5%
Negative38.1%

Bugs and requests

Tasks+Cal+Sync 4

Not enough reviews yet to summarise bugs or requests.

Reminders

Reported bugs

23 issues
  • Reminders re-syncing after deletion
  • Full-screen ads after payment
  • Broken Shortcuts automation
  • Cannot restore previous purchases
  • Ads in purchased versions
Show 18 more
  • Everything is duplicated
  • Calendar entries duplicated
  • App crashes on opening
  • Syncs only locally
  • Does not sync to Google Calendar
  • Last sync label always shows 'never'
  • 00:00 reminders shown as all-day events
  • Sync deletes and re-adds all reminders
  • Reminders duplicated in calendar
  • App doesn't open on Mac without crashing
  • Error syncing
  • Entries always show as 30 minutes and reset
  • Reminders created twice in calendar
  • Regular appointments not fully transferred
  • Duplicate entries when loading on multiple devices
  • Cannot transfer entries made on Mac to all devices
  • Calendar and Outlook restricted
  • Not all calendars can be synced

Requested features

9 requests
  • Two-way sync between reminders and calendar
  • Ability to choose specific reminder lists to sync
  • Option to change the name of the created calendar
  • Ability to drag reminders in the calendar to organize
  • Select existing calendar for reminders
Show 4 more
  • More aesthetic hashtag alternative
  • Exclude reminders without time from syncing as all-day events
  • Fix Shortcuts automation errors
  • Sync changes made in calendar back to reminders

In-app purchases

None

Tasks+Cal+Sync 4

No in-app purchases

16 purchases

Reminders

Subscriptions16
  • Unlimited access3 Days trial$0.997 Days
  • Unlimited access3 Days trial$1.997 Days
  • Unlimited access3 Days trial$2.997 Days
Show 13 more
  • Unlimited access3 Days trial$3.997 Days
  • Premium features3 Days trial$4.997 Days
  • Premium features3 Days trial$5.997 Days
  • Premium features3 Days trial$6.997 Days
  • Premium features3 Days trial$7.997 Days
  • Premium features3 Days trial$8.997 Days
  • Premium features3 Days trial$9.991 Year
  • Unlimited access3 Days trial$19.991 Year
  • Premium features3 Days trial$19.991 Month
  • Unlimited access3 Days trial$29.991 Year
  • Premium features3 Days trial$29.991 Month
  • Unlimited access3 Days trial$39.991 Year
  • Unlimited access3 Days trial$49.991 Year

Questions

Is Tasks+Cal+Sync 4 free?
Tasks+Cal+Sync 4 costs $14.99, with no in-app purchases.
Is Reminders free?
Reminders is free to download, with in-app purchases available.
Which has better reviews, Tasks+Cal+Sync 4 or Reminders?
Reminders is rated higher. Tasks+Cal+Sync 4 averages 1.0 out of 5 from 2 ratings, while Reminders averages 4.5 from 96 ratings.
Do Tasks+Cal+Sync 4 or Reminders have ads?
Reminders shows ads; Tasks+Cal+Sync 4 does not.
Which is updated more often, Tasks+Cal+Sync 4 or Reminders?
Tasks+Cal+Sync 4 ships an update every 20 months, and Reminders every 6 weeks. Most recently, Tasks+Cal+Sync 4 was updated on October 16, 2026 and Reminders on October 20, 2026.

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