penguen.io
Build vocabulary in your language with spaced repetition
What it does
penguen.io is a free vocabulary app built for language learners. Learn the most essential words that cover the majority of daily conversations using science-backed spaced repetition. Choose from multiple practice modes including flashcards, dictation, listen and choose, fill letters, matches and multiple choice. Generate custom word lists, join a global leaderboard, track your streaks and study offline. Supports dozens of native languages. No ads, no subscriptions, completely free forever.
Does the same job
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- GAGlossarie – a new, immersive way to learn a language2024 · glossarie.app · ▲363
Hi HN, For over two years I've been working on an App to learn languages (currently French, Italian and Spanish), together with my partner, a language teacher. I think it is finally ready to share with this community! The idea is to introduce vocabulary and grammar whilst you read eBooks in your own language. I've found that it is easier to remember vocabulary 'in context' and with regular repetition. Plus you don't have to carve out dedicated time for language learning. Other apps require you to build a habit around various exercises or ‘games’, whereas lots of people already read books.…
- PDPersonalized Duolingo (kind of) for vocabulary building2025 · github.com · ▲161
Hi! Wanted to share the project I really wanted to have. TLDR; this app lets you create your own list of words and you get a Duolingo-like experience (kind of, still needs a lot of features) practicing those words in their context. My English is not the best but not the worst either. But I realized I can't boost it up after a certain level! In my belief, in order to truly learn a language, you need to be exposed to that language often. Vocabulary is the key factor here if you really want to improve in any language. My experience is that when I read a book to improve my English vocabulary, I…
- FVFlowery – Vocabulary builder powered by LLM and spaced repetition2024 · flowery.app · ▲21
Dear hackers: Whether English is your first or nth natural language, you may be familiar with this vexing experience: You encounter a flowery word in a book, podcast, or HN comment; you endeavor to memorize it to hone your speech and writing; you purge it from your synapses by the next day. Flowery (https://flowery.app) streamlines vocabulary building by: • Rendering a typographically pristine Oxford dictionary and thesaurus. • Conjuring up the stochastic parrot to eliminate the tedium of flashcard creation. • Scheduling the flashcards with a spaced repetition algorithm. About the…
More work this month
the category →
The app store for voice native apps that lives in your notch
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Work · 5d ago · cleanshot.com
Launched alongside, April 2026
the whole month →
- AG
Thought the resources for GPU arch were lacking, so here we are
Life & fun · Apr 2026 · jaso1024.com
- IB
Built a ~9M param LLM from scratch to understand how they actually work. Vanilla transformer, 60K synthetic conversations, ~130 lines of PyTorch. Trains in 5 min on a free Colab T4. The fish thinks the meaning of life is food. Fork it and swap the personality for your own character.
AI · Apr 2026 · github.com
- BC
Life & fun · Apr 2026 · sam-burns.com
- IB
With social media and now AI, its important to keep the indie web alive. There are many people who write frequently. Blogosphere tries to highlight them by fetching the recent posts from personal blogs across many categories. There are two versions: Minimal (HN-inspired, fast, static): https://text.blogosphere.app/ Non-minimal: https://blogosphere.app/ If you don't find your blog (or your favorite ones), please add them. I will review and approve it.
AI · Apr 2026 · text.blogosphere.app