You’re just leaving the gym when you get a call from a number you don’t recognize.

You swipe right and bring the phone to your ear, but before you can even say hello you’re blasted with a cruise ship horn and an enthusiastic computer voice promising you a free cruise. It’s annoying when it happens once, but when you get these calls every day, it starts to become problematic.

Spam call blocking apps like Truecaller and Hiya work by comparing the numbers that call you against their huge database of billions of numbers. This database of millions of numbers is collected from everyone who installs the app as part of the End User License Agreement (EULA) that you agree to when installing the app.

Spam Blocking App" Truecaller" must Try

You’re just leaving the gym when you get a call from a number you don’t recognize.