Marketplace
Call Notes Pro
This application shows you notes, company, position, birthday, and closest event from the calendar and so on during the call. You can also enter notes as while you are on the call (or when the call ends) and even sync your in-app notes with Evernote and OneNote.
Please see Play Store description for full details.
I believe this was a 24 hour sale, so I am sorry for the late notice because I only just spotted it. According the the description the sale ends at around 10am to 11am today (Wednesday 22nd March 2017).
Ways to get this app for free