Frequently Asked Questions

KnightVision Pro is a browser extension and Android app that provides real-time Stockfish chess move evaluations by drawing color-coded tiles directly on your chessboard.

We currently support Chess.com and Lichess.org.

When you purchase KnightVision Pro, you receive a license key via Gumroad. Licenses are available in various durations, from weekly to lifetime access. You must enter this key in the extension settings to unlock Pro features.

A single license key can be used across your personal devices, including your desktop browser and the Android app.

Yes, we offer refunds within the first 14 days of your initial purchase if the product does not meet your expectations. Please contact us via Gumroad support.

Yes, we have a beta Android app available that overlays move suggestions on top of the Chess.com and Lichess apps.

This could be due to several reasons: you might have the "My turn only" setting enabled and it is your opponent's turn, your Pro license key may be invalid or expired, or you might be on an unsupported page.

We use a high-performance serverless architecture located in Singapore to provide incredibly fast engine evaluations, typically returning suggestions in a fraction of a second.

We utilize the official Stockfish 19 NNUE engine running on our servers, combined with Lichess cloud evaluations for instantly known positions.

We only send the current board position and your license key to our servers to calculate the best moves. We do not collect any personal data, browsing history, or account credentials.

You can reply to your Gumroad receipt email to reach our support team.