Relationships and sketchy apps

So tonight my SO fell asleep playing a game on his phone, I went and plugged it in for him so he'd have a charge at work. I swear I didn't go thru it, but on the notification bar I noticed there was a notification from the Whisper App... Do you think there is a reason to be a little concerned? I know it's probably completely silly, but I think my pregnancy hormones have got the best of me. 
UPDATE: I ended up asking him about it this morning, he said he just downloaded it to see what it was. And he opened it up while I was laying next to him, he hadn't created any whispers and had zero messages. I trust him,  I really do, I've just been hurt so many times in past relationships it's hard to not wonder. Thanks for the advice 😆