Phillipp
Brilliant.org seems to copy Duolingo. They have a day streak system and leaderboards. Not good.

Fun fact: I have a Duolingo streak of 1992 days right now.
Brilliant | Learn by doing

Guided interactive problem solving that’s effective and fun. Try thousands of interactive lessons in math, programming, data analysis, AI, science, and more.

May 23, 2023 at 9:58pmWeb
Show threadpaulyd II - the wrath of caro-kannMay 23, 2023
@phillipp that..... is a lot of days! Just one language? or an assortment?
Show threadPhillippMay 24, 2023
@paulyd Norwegian, Danish, Swedish. The problem is, I have no real world exposure, therefore my learning is quite slow.
Show threadpaulyd II - the wrath of caro-kannMay 24, 2023
@phillipp
I've been doing Spanish, and supplementing with podcasts.
Show threadMichał SzajbeMay 26, 2023
@phillipp when the app is good (Duolingo is) the streak system and social features are great ways to reduce churn. I can’t even think of trying another app because I have my whole extended family on Duolingo and obviously I’ve been working hard for my 2100+!
Show threadPhillippMay 26, 2023
@szajbus With such a streak, one really does everything to protect it :D