2FAS which seems recommended for data privacy.

By whom?

There is a discussion in the Privacy Guides forum on 2FAS that you might want to read.

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Also, you don’t specify which platform you’re using. As @I_Am_Jacks_____@lemmings.world mentioned, Aegis for Android is great. For iOS, the pull request to include ente Auth in the Privacy Guides recommendation page for authenticator apps is already merged. It will reflect on the live website once the Privacy Guides team decides to release v3.17 of the site.