i was informed today that someone i know that has my cell phone number, can monitor my calls and messages through an app downloaded on his phone. is there a way either i or koodo can check to see if my phone in traced?
Koodo has no way of knowing this. If anything, I recommend doing a factory reset. This will set your phone back to the day that you bought it(IE: Fresh activation) and it'll clear out any suspicious apps, as long as they aren't backed up.
Of course, the likelyhood of your phone being traces is slim. You would have to download an app that wasn't through the playstore/iTunes.