When comparing Simplenote vs TickTick, the Slant community recommends TickTick for most people. In the question“What are the best cross-platform task apps?” TickTick is ranked 6th while Simplenote is ranked 39th. The most important reason people chose TickTick is:
On each task you can choose between a text description or a checklist.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Very simple and clean interface
Simplenote takes a minimalist approach to its interface. There are no toolbars full of formatting options or extra features like notebooks to group notes. The entire desktop interface consists solely of a sidebar with your tags and trash filters, the list of existing notes with search, a button to add a new note and a simple view for looking an existing note or writing a new one.
Pro Geared towards fast usage
Unlike alternatives (such as Evernote) that are laden with features, Simplenote is fast to use and sync. Reviews from the Verge, Lifehacker, and a variety of other sources all describe using the Simplenote apps as very fast. While it may not be as feature-rich as other apps, the responsiveness of the app and simple interface keep it easy to use while never slowing down the user when they need to quickly take a note.
Pro Works offline
Users can edit and create documents offline, can then sync their content the next time they are online. This way a user can work even when there's no data connection without the worry of losing work.
Pro Desktop app is open source
The desktop version of Simplenote is hosted on the GitHub and since it is open source, it can allow developers to fork the code in order to improve the app.
Pro Can export your data
The program enables exporting of notes as text documents.
Pro Collaborative features
Notes can be shared with others or worked on collaboratively.
Pro Open Source
All of the Simplenote apps are open source and ready for your contributions! You can find the source on GitHub:
iOS: https://github.com/automattic/simplenote-ios
Android: https://github.com/automattic/simplenote-android
macOS: https://github.com/automattic/simplenote-macos
Electron (Windows and Linux): https://github.com/automattic/simplenote-electron
Pro "Time machine" style revision control on the notes
Each edit of a note is saved in order to allow the user to go back to a previous version of a document. This way, if mistakes are made or something is deleted, you can go back to the previous version without any hassle.
Pro Wide range of great clients with great sync
Official native apps are available on popular platforms such as Android, iPhone, iPad, Kindle, OS X, Windows and Linux. Open-source clients extend this support even more widely to various other platforms, such as webOS and the BlackBerry PlayBook. These apps embody the core philosophy of Simplenote: minimalism and focus on the note taking.
There are multiple unofficial clients (including the excellent Notational Velocity and NValt, a fork of the app with markdown support and other goodies.)
Pro Markdown support via web interface
There is support for Markdown when using the web app. This can be convenient for those who want to use Markdown in a particular note.
Pro Linux client available
Pro Excellent iOS app
Pro Excellent desktop client in the form of nvAlt

Pro Create checklist for a task
On each task you can choose between a text description or a checklist.
Pro Cross-platform
It’s accessible on the web, via a Chrome extension, on Android (phone/tablet, with widgets), and on iOS.

Pro Flexible recurring tasks
Recurring tasks are simple to set, and can be created according to custom rules.
Pro Customizeable Android widget
You can change the opacity, themes, lists, and cosmetic features of the widget.
Pro Smart date parsing
You can type "buy milk tomorrow 5pm" it will turn into a task as "buy milk" and reminder set as tomorrow 5pm automatically.
Pro Multiple reminders
You can add up to five reminders for different time to a single task.
Pro Smart List
Allows you to set custom filters, making it easier to find tasks.
Pro Multiple reminders
Supports up to 5 reminders per task.
Pro Advanced sorting options
Tasks can be sorted by dragging and dropping them in the list.
Pro Google Calendar integration
You can integrate TickTick with Google Calendar.
Pro Lightweight app
TickTick is resource-light, which is great if you run multiple programs or are using an older device.
Pro Clean UI
TickTick takes a minimalistic approach in order to keep things simple.
Pro Easy to add tasks
Just start typing to add a task.
Pro Has a calendar view
Pro version of the software allows tasks to be laid out in an easy to overview calendar view.

Pro Supports #hashtags (labels)
Just click a hashtag to filter your labeled tasks.
Pro Description and checklist all together
Paid users can add description and checklist into a single task all together.
Pro Set list color
You can set a different color for each list.
Pro Free task tagging
Tags are a native feature; up to five tags can be applied to each task.
Pro Great support to recurring tasks
Easy to set recurring tasks and a lot of possibilities to do that.

Pro Share task lists for collaboration
You can share a list through an email or a shareable link.
Pro Location reminder
Remind you of a task when you reach specific location.
Pro Can set duration of a task
You can set starting and ending date and time for tasks.
Pro Follows Android design guidelines
The mobile Android app of TickTick follows the Android design guidelines for a familiar interface.
Pro Keyboard shortcuts
TickTick supports keyboard shortcuts that makes it easier to work with.
Pro Custom themes for pro users
Paid users can enjoy pro themes.
Pro Recover from trash
Easy to see and recover tasks from trash if you deleted them by accident.
Pro Print tasks
Easy to print any task you want to.
Pro Siri integration
You can add tasks via Siri.
Pro Folder with concluded tasks
Easy to see all concluded tasks by date of conclusion.
Pro Support team is great
Support team responds quickly.
Pro Integration with calendars by URL
Shows your events on other calendars (like Outlook) in your task list.
Cons
Con No note encryption at rest
Notes are encrypted in transit, but remain unencrypted on Simplenote's servers.
Con Limited ways to reorder notes
You are able to sort your notes alphabetically, date modified, or by last created. There is no way to drag and drop the notes to create a custom order.
Con No reminders
You cannot set reminders to revisit a specific note or complete a task.
Con No support for file attachments
Simplenote doesn't provide support for embedded attachments. This can limit the use for some as many other note-taking apps do support this type of feature.
Con Search is limited to one tag
There seems to be no way to find notes that have both tag X and tag Y. This isn't a big deal until you have a large library of notes, and want to cross-search for two things at the same time to vastly narrow down your search.
Con No way to import notes from anywhere
Con Web access only for updated browsers
They recently removed support for older browsers, and it's not working on the latest version of Waterfox. You need an updated version of a well-known browser.
Con No 32-bit version
Con The search function doesn't see tags
If you search for 'foo' you won't find notes with tag foo. In that regard, tags are completely isolated from the search.
Con No way to bulk-apply a tag
This is a typical workflow action in other apps: Do a search, multi-select notes among the matches, then apply or de-apply one or more tags to all these notes at once.
There's no way to do this in Simplenote. The only bulk operations are Delete and Pin-to-top.
Con No notification when changes made on a shared note
Currently, there is no way to be alerted when a change is made by another contributor on a shared note.
Con Save-to-disk feature is poor
The only way to download your data off Simplenote is via a "download zip" feature that unfortunately loses all the semantic structure of your data (tags, for instance).
Con No integrated social media sharing
The only way you can share notes with others is with a link you're given when you publish your note. There is no integrated social media sharing if you directly want to post your note to Twitter, Facebook, etc.
Con Lack of color impacts usability
There are two themes available, the default theme and a dark theme.
Both use only the single solid color (either white or black) for the background, so there is a lack of visual cues to separate what you're looking at.
Con No native integrations with IFTTT or Zapier
The app doesn't feature native integration with these services, but you can use this functionality by fiddling with the custom email address that is provided by TickTick.
Con unable to sync with gtasks, only imports
Con Intelligent date and time entries don't work everywhere
In some apps, you can type "call Ben tomorrow at noon" and the date and time fields will be automatically populated with "tomorrow" and "noon". TickTick has recently implemented this feature, but it doesn't work flawlessly via the webapp or via a widget. The functionality does work good within the Android app, however.
Con Free version is limited
TickTick's free version is limited to 19 task lists, 1 attachment per day, and 1 collaborator.
Con Abo model is too expensive
Con Translation to Portuguese is not professional
For Portuguese speakers, the Portuguese translation seems very amateurish.
Con No search of non-latin languages in web
The web version has no ability to search non-latin languages (e.g. Russian, Greek).
Con Interface is not clear
It has too much information, causing some confusion sometimes.
