Android Clean-Reader-to-Kindle Pipeline That Actually Renders Modern Web Pages
Researchers and long-form readers want to share-sheet a URL on Android and have it land on their Kindle as a clean PDF or EPUB. Push to Kindle and Amazon's own Send to Kindle break on modern interactive layouts (sliders, lazy-loaded sections, paywalls). Opportunity is a render-engine-first reader extractor that uses headless Chromium server-side, then converts to e-ink-friendly format and pushes via Amazon's send-to-Kindle email.
Run headless Chromium with reader-mode JS injection on a $5/mo VPS, render to A6 PDF/EPUB, email to user's Kindle address. Charge $3/mo. The retention story is real because Pocket is dying and Amazon won't fix their app — you can quietly own the long-form-to-e-ink crowd.
landscape (3 existing solutions)
The category was 'solved' a decade ago and nobody has reinvested. With JS frameworks (React, Vue, Astro) dominating the open web, server-side reader extraction is broken on enough sites that a quality-first alternative would clear the bar quickly.