HHe told me he doesn't use Snapchat?

He said he doesn't use Snapchat but has females named on it one in particular is named "mystery:)" and "redjeepgirl". He is guess hearted mystery story about coming to see her at her job at auto sells place... but obviously I can't see everything else... is he cheating? Is he looking to cheat? How should I approach him?

Updates
9 mo
He said he has it downloaded but doesn't use it.. I felt something was off so I snuck and checked his phone.. im now afraid to confront him because I know he will be angry for me checking his phone and for accusing him
HHe told me he doesn't use Snapchat?
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