Peter Liu

Founder at GraceOrbit — Education tools

About

Building simple, human-centered tools at GraceOrbit. Currently focused on education products — like english-grammar.app, a free grammar practice site for learners worldwide. I believe technology should feel calm, not overwhelming.

Links

English-Grammar.app

GraceOrbit

Badges

Tastemaker

Gone streaking

Maker History

English Grammar AppLearn grammar with focus mode & instant feedback
Jan 2026

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Joined Product HuntJanuary 31st, 2026

Forums

p/english-grammar-app

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4mo ago

Hi Product Hunt! Here's why I built this

Hey everyone!

I'm the maker of English Grammar App.

I built this because I wanted a structured way to practice grammar not just random exercises, but a clear learning path.

What makes it different:

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4mo ago

English Grammar App - Learn grammar with focus mode & instant feedback

Free interactive grammar exercises for learners worldwide. Practice tenses, conditionals, modal verbs, and more with instant feedback.