Whats the Best PDF Reading App for Ipad That Lets You Annotate Or?

What's the best PDF reading app for iPad that lets you annotate or draw on canvas?

Simply download a PDF file to your iPad. Without using ANY app, simply tap the file, and it opens. You can now read and share the file like any other. And even if it’s got lots of pages, you’ll be able to see thumbnails of the pages, and track what page you’re in, and quickly search for words or phrases in the file, and easily and intuitively go to multiple discoveries of the search word or phrase, up or down. Once the file is open, look at the upper right corner for an icon with a pencil in a circle. Tap it, and a range of writing and markup tools appears. Make all the notes you like, or highlight sentences or paragraphs. There’s even a ruler tool. tap the little plus mark on the right of the markets for text tools, signature tool, magnifier and more. Apple has fully supported PDF files for years with each iteration of its operating system. No app is needed.