Science, Math, AI, lets experiment

Here is the few apps and tools you can benefit from

Lessons, extensions, and packages

Live classes plus the developer tools we ship to VS Code, Chrome, and PyPI.

Live class · Sundays 4 PM EST

Machine Learning & AI Lessons

Neural networks, deep learning, and real-world AI, discussed live every week.

Join
VS Code extension

Breakpoint Python

Add native breakpoints to Python running in the terminal, where VS Code breakpoints don't reach.

Install
Chrome extension

Screen Recorder Pro

Record 4K screen video with voice for video messages, tutorials, and lessons.

Install
Python package · PyPI

codeplots

Tiny matplotlib shortcuts for plotting from VS Code, built for remote SSH work.

pip install

On-device AI in your browser

Language models and speech recognition that download once, then run with no server.

Web app · On-device LLM

JARVIS

A language model that runs on your phone. Downloads once, then answers offline.

Open
Web app · On-device LLM

Gemma 3 1B

Chat with Google's Gemma 3 1B in your browser via WebGPU. Cached after one download.

Open
Web app · On-device LLM

Qwen 2.5

Run Qwen 2.5 0.5B fully on-device in the browser, with no server round trip.

Open
Web app · On-device LLM

LFM2.5

Chat with Liquid AI's LFM2.5-350M over WebGPU. Nothing leaves your browser.

Open
Web app · Hosted LLM

LLM7 Chat

Free OpenAI-compatible inference in the browser. No API key required.

Open
Web app · Speech to text

Whisper Mic

Free voice transcription in your browser using Whisper, with no server.

Open
Web app · Speech to text

Moonshine Web

Real-time in-browser speech recognition powered by the Moonshine model.

Open
Web app · Speech to text

Moonshine Notes

Moonshine speech-to-text notes that run fully in your browser.

Open
Web app · Speech to text

Spraak

Dutch voice notes, transcribed on your device and working offline after one download.

Open

Screen and video

Recording and animation tools that work without an install.

Web app · Recording

Screen Recorder

Record your screen and voice in the browser and save as MP4. No install.

Open
Web app · Recording

Screen Recorder Pro (Web)

Record 4K screen video with voice and save as MP4, free in your browser.

Open
Web app · Recording

Screen Recorder + Face Mesh

Screen and voice recording with a face mesh overlay instead of raw webcam.

Open
Web app · Animation

Slow Motion Animator

Create smooth slow-motion animations right in your browser.

Open

Games

Free browser games, several playable with a friend in real time.

Web game

Data Fighter

A space data galaxy game. Battle the AI or another human.

Play
Web game · Multiplayer

Data Hunter

An interactive multiplayer data collection game.

Play
Web game · Multiplayer

Data Hunter 2

Real-time multiplayer position sharing, improved.

Play
Web game · Multiplayer

Data Hunter 3

A star field game with bases and scoring.

Play
Web game

BlockGame

A fullscreen block game you can play instantly.

Play
Web game · Puzzle

Logograph

A logic graph puzzle game.

Play
Web game

Mouse and Cat Chase

A quick browser game of cat and mouse.

Play
Web app · Multiplayer

Mission Hub

A real-time multiplayer mission control experience.

Open

Camera and face experiments

Face mesh video chat and detection demos built on MediaPipe.

Web app · Face detection

SmilePass

A face-detection check-in experiment that runs in the browser.

Open
Web app · Video chat

MeshyFace

Privacy-preserving video chat that sends a face mesh instead of your camera feed.

Open
Web app · Video chat

Face 2 Face

Real-time face mesh communication, second experiment.

Open
Web app · Video chat

Peer Face Mesh + Audio

Peer-to-peer face mesh rooms with audio.

Open
Web app · Video chat

MeshyFace 4

Peer-to-peer face mesh with privacy preserved end to end.

Open

Peer-to-peer chat

WebRTC messaging that connects two browsers directly.

Web app · WebRTC

WebRTC Chat

Peer-to-peer chat that connects browsers directly, with no server storage.

Open
Web app · WebRTC

ChatChat

Peer-to-peer chat rooms. Messages go browser to browser and are never stored.

Open
Web app · WebRTC

PeerChat

A PeerJS demo of direct browser-to-browser messaging.

Open

Everyday web tools

Small single-purpose apps that open instantly.

Web app · Drawing

Draw

A simple fullscreen drawing canvas in your browser.

Open
Web app · E-ink

Kindle Drawing Board

A minimal drawing board built for Kindle and e-ink browsers.

Open
Web app · Productivity

To-Do List

A simple to-do list that saves your tasks locally.

Open
Web app · Productivity

The Market List

A shopping and market list app that runs in the browser.

Open
Web app · Experiment

PocketOS

A desktop-style operating system experience in a browser tab.

Open
Web app · Maps

Satellite Viewer

Enter a latitude and longitude to view satellite imagery instantly.

Open
Web app · Music

Piano Recorder

Play a virtual piano in your browser and record your melodies.

Open
Web app · Design

Ottoman Pattern Editor

Create and edit traditional Ottoman geometric patterns.

Open
Web app · Education

Interactive Science

Interactive science demos and visual experiments for learning.

Open

More from LessonTime.AI

Writing, answers, and the people behind the apps.