DU Caller vs ReadNotify
A side-by-side look at DU Caller and ReadNotify. For an in-depth review of either product, follow the links below.
DU Caller
Security & Privacy
DU Caller is a free app that helps identify and block spam calls. It has a community-driven spam call database and can automatically block known spam numbers.
spam-call-blockingcall-identificationcommunity-reports
ReadNotify
Online Services
ReadNotify is an email tracking application that allows users to see when an email they sent has been opened. It works by embedding a tracking pixel in outgoing emails which pings back to ReadNotify servers when the email is viewed, letting the sender know it was opened.
emailtrackingnotifications
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