We don't often discuss Signal here at AP, not out of any sort of distaste, but because it adds new features and improvements at a slower pace than WhatsApp or Telegram. But if you happen to use Signal, then the new version has link previews in store for you. It's limited to four websites for now, but it's a good start.
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[Update: Community moderation is rolling out] Google+ v8.6 is rolling out with support for images and link previews in comments [APK Download]
Google announced yesterday that the Google+ "Web Preview" has been officially promoted to the standard interface in browsers and the Classic UI would vanish in the next few weeks. Alongside this news, a few new features were also mentioned, including support for embedded images and link previews in comment threads and new community moderation features. Not to be left out, there's a new update for the Google+ app rolling out today with the new comment features.
Read MoreCommunity moderation doesn't appear to be enabled yet, but based on a recent teardown, it's probably coming soon.