When comparing Fantastical vs Instapaper, the Slant community recommends Instapaper for most people. In the question“What are the most useful Android phone apps?” Instapaper is ranked 17th while Fantastical is ranked 19th. The most important reason people chose Instapaper is:
Allows leaving notes attached to articles and highlighting certain part of the text. Free version of the app is limited to 5 highlights a month.
Specs
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Pros
Pro Supports multiple calendar platforms
If you're locked into using an Exchange account, Google Calendar won't work without 3rd party syncing options. Fantastical works flawlessly with Exchange and with Google Accounts so you can have both. It also supports iCloud, Office365, Yahoo, and Facebook calendars.
Pro Fantastical can comprehend natural language
You can copy and paste a line from a meeting note and Fantastical can copy down and present the relevant information
Pro Beautiful and highly polished design
Pro Annotation tools
Allows leaving notes attached to articles and highlighting certain part of the text. Free version of the app is limited to 5 highlights a month.
Pro Excellent typography choices
Instapaper allows you to choose from 14 different fonts, some of which have been designed specifically for the application. You can manually adjust spacing between lines, padding around text and font size to fit your preferences.
Pro Allows listening to articles
Instapaper comes with a build in text-to-speech feature that will read out loud articles. Premium version of the app allows creating playlists.
Pro Articles can be emailed to Instapaper
You can add articles to Instapaper by sending them to a unique email address associated with your account.
Pro Pagination
Allows for pagination, not just scrolling.
Pro Awesome offline mode
Pro Can look up words in a dictionary and Wikipedia
Pro Can be set to switch to dark mode based on time of day
Instapaper includes a dark theme and allows switching to it after a set period in time or gradually over the course of the day.
Pro Rarely seen organization options
In addition to allowing you to sort articles by when you saved them, you can also order articles by length or read progress and popularity.
Pro Free archiving of deleted webpages
In Pocket, this is a paid function - but Instapaper provides this for free! If a webpage is deleted, it remains in your Instapaper and they even archive pictures of the articles.
Pro Can playback inline video
Instapaper will play videos from YouTube, Vimeo and other sources that are embedded in articles, but you have to be online for playback to work.
Pro Has a font designed for readers with Dyslexia
Instapaper includes Dyslexie a font that helps people with reading problems understand the text better.
Pro Includes optional social features
If you set your Instapaper profile to be public, your friends will be able to see articles you've liked.
Cons
Con Expensive for a single utility app
Fantastical on OS X costs $49.99 and an additional $4.99 if you want to use it on iOS.
Con Only supports iOS and OSX
Fantastical doesn't support web, Windows or Android.
Con Became a paid service again
Most functions, like search, became premium.
Con Basic search not free
Basic search for link title or website too is part of the premium.
Con Embedded images and videos are sometimes ignored
Instapaper sometimes saves articles without images or videos.
Con Only supports English
It only supports English, and not Chinese, Japanese, and Korean languages.
Con Tags not implemented
Con Search functions return random articles
The search function is very slow and does not provide accurate results. The user can not filter or reorder the search results, or search the archive or annotated articles.