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Reader — PDF & Notes

PDF highlights and notes, synced through your own Drive

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Free PDF reading, highlights and notes on Android 9+. No ads or required account. Read offline, export annotated PDFs, and optionally sync through your own Google Drive (drive.file). Open the same library on the web. No OCR, handwriting or reflow.

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PH · launched Oct 28, 2026 · 2 upvotes (top 23%)

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Could you build this?

Partial The UI is vibe-codeable, but reliable PDF rendering, highlight anchoring, and exporting annotated PDFs are nontrivial. Doing this robustly with a Drive sync layer requires PDF internals knowledge.

What it would actually take: Use Android PdfRenderer or a library such as MuPDF or pdf.js for rendering, with a local annotation store keyed to page coordinates. Annotated export requires writing PDF annotation objects (or using PdfBox-style tooling) so highlights survive in other readers. Drive sync can use the drive.file scope with conflict handling. The hardest part is correct PDF annotation writing and cross-reader fidelity, which takes more than prompt-driven coding.

Competitors

Other products that read as similar to this one : 960 launches clear the similarity bar, closest 8 shown.

Attention rank: #83 of 961 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 330 days after the earliest competitor.

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