can the s4 use the flash as a txt alert like the iphone ?

[KGreis]

Is there an app or something for it?

 

[z96Cobra]

Not sure about stock, but Hyperdrive ROM has this ability.

 

[KGreis]

I dont like doing roms incase I ruin my phone

 

[DevilDogMP]

There are apps in the play store. Just type in iPhone flash notification

 

[GVLBob]

Is there an app or something for it?

The S4 has a LED Notification light and also can provide tone alerts. You want something even more dramatic as an alert?

What happens if the phone is "face up"?