> check out my bio for one example.

First thing I got was “browser not supported” on mobile. Then I visited the website on desktop and tested languages I’m fluent in and found immediate problems with all of them.

The voices in Portuguese are particular inexcusable, using the Portuguese flag with Brazilian voices; the accents are nothing alike and it’s not uncommon for native speakers of one to have difficulty understanding the other in verbal communication.

The knowledge assessments were subpar and didn’t seem to do anything; the words it tested almost all started with “a” and several are just the masculine/feminine variants. Then, even after I confirmed I knew every word, it still showed me some of those in the learning process, including incredibly basic ones like “I”, or “the”.

The website is something, and I very much appreciate you appear to be trying to build a service which respects the user, but I wouldn’t in good conscience recommend it to anyone. It feels like you have a particular disdain for Duolingo-style apps (I don’t blame you!) but there is so much more out there to explore in language learning.

Haha, thanks for checking it out! I really appreciate the feedback.

> First thing I got was “browser not supported” on mobile.

Yeah, I use some APIs that were only implemented in Safari on iOS 26. Kind of annoying but I use Android so I didn't realize until too late. I should fix it, but it's not a priority given the numerous other things that need improvement (as you noticed!)

> The voices in Portuguese are particular inexcusable, using the Portuguese flag with Brazilian voices; the accents are nothing alike and it’s not uncommon for native speakers of one to have difficulty understanding the other in verbal communication.

That's good feedback, thanks! I only added Portuguese this weekend (https://github.com/yaptown/yap/pull/73) so it's definitely still very alpha (as noted on the website :P )

> The knowledge assessments were subpar and didn’t seem to do anything; the words it tested almost all started with “a” and several are just the masculine/feminine variants.

Thanks, will fix this tonight. The placement test was just added last week (https://github.com/yaptown/yap/pull/72) so there are still some kinks to work out.

> Then, even after I confirmed I knew every word, it still showed me some of those in the learning process, including incredibly basic ones like “I”, or “the”.

Yeah, the logic doesn't really work for people who already know every word. It tries to show words in the following order (descending): probability_of_knowledge * ln(frequency). But if you already know every word, probability_of_knowledge is the same for every word and the ln(frequency) is the only one remaining, meaning you just get the most common words. I'll add a warning to the site for people who are too advanced for the app's dictionary size – as you pointed out, it's not a good UX.

> there is so much more out there to explore in language learning

There is! I usually recommend pimsleur to people. My hope is just for my app to be a useful supplement.