Stack play online

Stack is a simple and intuitive PDF reader. It's the perfect app for book lovers on the go. It supports night mode and pan-zooming. Stack also has a note taking feature to allow you to easily note down key points. The night mode feature allows you to go for hours without eye pains. Stack also features a password option to ensure your data is safe. It also remembers your last viewed page so that you can easily start where you left off.