Is there an Android app that can take a photo every x seconds?
Framelapse by Neximo Labs is a great app for timelapses…But I dont think, that you are looking for an app that would create a time-lapse, are you? In that case, you can use Open camera! If you go to settings - delay between sequential shots (to set in wich interval you want to take your photos). You cat then enable sequential shooting in the three dot menu of the app.