NoSub — subtitle blocker for language learners

Actually block video subtitles while learning a language, forcing yourself to listen

Problem

People want to train their ears with videos but can't resist reading subtitles; many players' subtitle-off switch doesn't work or only works on some platforms. There's no universal tool that truly covers the subtitle area.

Solution

A lightweight overlay tool that covers the subtitle region with an adjustable block or blur, working over browsers and local player windows, with a hotkey to peek and a mode that only applies when the mouse is away from subtitles—so you listen first, check later.

Users

Language learners training listening with films and courses

MVP

Subtitle-area overlay in fullscreen and windowed modes; adjustable position, size and blur; hotkey to reveal temporarily; per-app saved profiles

Revenue

Free base version plus a one-time Pro purchase (multi-monitor, config templates, study-time stats)

Why now

Video-based language learning demand is steady and player subtitle controls remain unreliable; a purely local desktop tool needs no servers and is fully indie-controllable