Downloading a mobile app from an ad is extremely dangerous. I encourage you to read the latest San’s Ouch! Newsletter and discover what happened when a lady named Sarah did exactly that. Spoiler alert…things didn’t go well. You should only download mobile apps from the Apple App Store for iPhones/iPads or the Google Play Store for Android devices. Even then you need to keep your guard up. There have been instances where both app stores were fooled for a short period of time.