Part of my product is a browser based e-signature collection tool using <canvas>, React.js and web sockets. So, not Android related. Any capacitive touch device

Part of my product is a browser based e-signature collection tool using <canvas>, React.js and web sockets. So, not Android related. Any capacitive touch device with a browser and internet works. It's fairly domain specific today (credit card transactions and legal agreements), but as a weekend project I want to abstract it for broader use cases.