When comparing Flynx vs Samsung Internet, the Slant community recommends Flynx for most people. In the question“What are the best Android web browsers?” Flynx is ranked 14th while Samsung Internet is ranked 19th. The most important reason people chose Flynx is:
A simple double-tap will save an article that can be pulled up at any time. All this is done in the background as to not interfere browsing.
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Pros
Pro Articles can be saved for offline reading
A simple double-tap will save an article that can be pulled up at any time. All this is done in the background as to not interfere browsing.

Pro Built-in reading mode
Blogs and articles can be opened in a distraction-free mode that even removes ads, saves memory and uses up less data.

Pro Loads links in the background
Flynx can open up to 4 links simultaneously in the background. This can eliminate having to wait for each page to load.
Pro Can be installed on any Android devices
Samsung allows this application to be installed to non-Samsung Android devices starting with Android 5.0 Lollipop.
Pro Ad-blocking features
Samsung Internet supports Ad-Blocking features such as AdBlock Plus, AdBlock, AdGuard, Disconnect etc., but must be installed separately through Google Play, which these apps can also used in other browser which supports Ad-Blocking.
Pro Sync with Google Chrome desktop app
Samsung Internet can sync the bookmarks and history to Google Chrome desktop app, where the Samsung Internet extension for Google Chrome is available.
Pro Picture-in-picture (PIP) video
Samsung Internet supports picture-in-picture (PIP) video, which means the video that played in this web browser can be pop-out and visible in the Android screen even if the browser is minimized.
Pro Light and smooth + has chrome extensions
Pro Notifications
Samsung Internet supports web notification from various websites such as Facebook, Telegram etc. which it will also works even if the browser is closed.
Pro Clean GUI
Pro Do Not Track features
Samsung recently collaborated with Disconnect to include do not tracking features to prevent any websites to track with each other.
Cons
Con No desktop sync
Although there's a sync option to sync across devices, it has no web client. If you want to view the links on your desktop, there's no feature for that.
Con Messes with any video played full screen
The screen flickers in full screen video mode if any Flynx bubble is open.
Con Asks for unnecessary permissions
Asks for phone state permission which is not required for the app to function.
Con Could be a little buggy sometimes
Slows down your phone occasionally.
Con Doesn't support drop down menus
Con Has the filter bubble
Like chrome, samsumg internet tracks you and filters your searches.
Con Not supported by Password Managers
BitWarden and LastPass do not work with the browser.
Con No data saving mode
Unlike Google Chrome or Opera, Samsung Internet does not comes with data saving mode which is a disadvantages for users who relies on limited data usage.
Con Android only
Android dropped older iOS support after about SI 3.
Con It's Google
Data collector!
Con Only for Samsung Devices
While the competitors are vendor-agnostic, this browser is only limited on Samsung devices and can't be found anywhere else unless you pull the APK for the browser itself from the device.
