@
Kote Isaev @
Djembro, RO, supports 

Not to mention that Tumblr, just like Facebook and every last blog out there, uses a one-post-many-comments conversation model whereas Mastodon hangs on to Twitter's loose strings of posts.
If you want that conversation model
and full HTML text formatting
and images embedded within the post
and development being done outside the USA, your only choices is the family of "better-than-Facebook Facebook alternatives": Friendica, Hubzilla, (streams), Forte. Friendica is developed by two Germans with the code on GitHub in the USA. Hubzilla is developed by a German and a Norwegian with the code on Framagit in France. (streams) and Forte are both developed by their and Friendica's and Hubzilla's creator in Australia with the code on Codeberg in Germany.
None of them is a Facebook clone, though, and nobody should expect either to be a full-on Tumblr clone. UI and UX are a lot different. Also, all four have quite a bit of a learning curve, regardless of where you come from.
Lastly, readily available native third-party mobile apps only exist for Friendica and for Android. There's an iPhone app for Friendica in development, but it's a long way to daily-driver material. Friendica is also the only one of the bunch with the Mastodon client API, but Mastodon apps can only cover a tiny fraction of what Friendica can do, namely what Mastodon can do, too.
As for apps for the other three, no dice. There's no native mobile app even in sight, also because such an app would end up an absolute monster. And none of them supports Mastodon apps and most likely never will because the Mastodon client API covers even fewer of their features. In fact, it does not cover a lot of critical everyday features, so trying to use one of the three through a Mastodon app makes no sense whatsoever. You're better off with the Web interface either way.
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