Can an app spy on me

[AC Question]

Something very alarming just happened, I was looking at my phone on Facebook app, not clicking anything spacial. as soon as I exited I start hearing laughter and someone "shushing" someone else, like some is looking at me. I immediately shut the phone down.
Can something be installed on my phone that spies on me? i am not imagining i know what I heard

 

[B. Diddy]

Welcome to Android Central! Although it's conceivable, it's unlikely. Perhaps it was part of some ad or video that mistakenly started to play.

 

[dpham00]

If you are worried, I would suggest that you do a backup and do a factory data reset

 

[recDNA]

Look at app permissions. I was interested in a well known app that locates and tells the strength of local lte towers. In theory I could figure out whether verizon or gsm is stronger in my town.

I look at app permissions and it is EVERYTHING! Contacts, pictures, phone history, data, email I mean please. Why do they have to see my pictures?

 

[ronniegsd]

Thank you for the response, Thing is, I didn't look at any website that might play a video. It sounded like a bunch of people giggling and hushing each other.
I now put a tape on my front facing camera and will reboot. are there any apps that can be installed remotely on my phone that will do that, so it wont happen again?

 

[recDNA]

The only way to be sure is to do a factory reset then install each app one at a time. Don't auto restore from Google nor Samsung.

BTW my wife has some game on her phone that randomly makes assorted sounds when she isn't playing. Do you play games?