I turn curious problemsinto useful tools.
I build tools that help people live, think, and work better.
Things you can use
Apps I built
Psychological SupportExplore →
Earthquake SupportAquí ContigoConnect with professionals donating virtual support sessions to people affected by the earthquake in Colombia.Better SleepExplore →
Stop SnoringAn evidence-informed eight-minute routine with six guided tongue, palate, cheek, and lip exercises.Better ThinkingExplore →
Depolarize YourselfSee source-backed positive impact and criticism about a public figure, side by side.Languages↗
Learn LanguagesParlaiA WhatsApp language-learning bot that turns everyday conversations into practice.Languages↗
Practice LanguagesTandemGPTPractice languages through AI conversations and targeted corrections.Better ThinkingExplore →
Challenge Your BiasNine QuestionsA small questionnaire that helps challenge your gut feeling before making a decision.Learn German↗
Learn ArticlesDer Die DasLook up the grammatical gender of German nouns from your browser.
Earthquake SupportAquí ContigoConnect with professionals donating virtual support sessions to people affected by the earthquake in Colombia.Better SleepExplore →Stop SnoringAn evidence-informed eight-minute routine with six guided tongue, palate, cheek, and lip exercises.Better ThinkingExplore →Depolarize YourselfSee source-backed positive impact and criticism about a public figure, side by side.Languages↗Learn LanguagesParlaiA WhatsApp language-learning bot that turns everyday conversations into practice.Languages↗Practice LanguagesTandemGPTPractice languages through AI conversations and targeted corrections.Better ThinkingExplore →Challenge Your BiasNine QuestionsA small questionnaire that helps challenge your gut feeling before making a decision.Learn German↗Learn ArticlesDer Die DasLook up the grammatical gender of German nouns from your browser.
Human Made (Not AI)
Articles I wrote
Juan Herrera
How to Apologize
Juan Herrera
How to Code with AI
Juan Herrera
How to Pick a Co-founder
Juan Herrera
How to Quit Bad Habits
Show old articlesHide old articles17
Solo Polyamory: A Relationship with Yourself14 min read14 minWeekly Check-Ins: Reinforcing Our Bond3 min read3 minThe Most Important Part of an Apology6 min read6 minPolyamory: Fostering Human Connection7 min read7 minDecompartmentalizing Productivity9 min read9 minA Recipe for Open Relationships7 min read7 minRecipe for Urgent Recovery6 min read6 minCómo aprender Inglés en un país hispanohablante8 min read8 minStarting a new life in Austria5 min read5 minNgColombia: Our Community11 min read11 minNgColombia: Our Selection Process3 min read3 minMouse Drag with RxJS4 min read4 minTwo years trying to sleep earlier: This is what I learned5 min read5 min¿Qué es arte? La guía definitiva7 min read7 minSi quieres un cambio en tu vida, debes leer esto3 min read3 min6 cosas que haces todo el tiempo y que deberías dejar de hacer4 min read4 minPor qué tu cumpleaños no debería tratarse de ti2 min read2 min
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