How can I compare two PDF documents for differences on my phone?

I received a revised 20-page PDF contract while away from my desk, and I only have my Android phone with me. Switching back and forth between the two files is giving me a headache, so is there an easy way to automatically highlight the text differences on a mobile screen?

Honestly, just open your browser and upload them to Draftable. It compares both files and highlights all the text changes automatically. I have to do this with revised vendor contrcts on my phone all the time.