Greatest Common Factor, also known as Greatest Common Divisor, is an Android application developed by mikeyaworski. It falls under the category of Education & Reference and is available for free.

This app allows you to calculate the GCF of an unlimited number of input values. You can input the numbers using spaces, commas, or new lines as delimiters. If your keyboard doesn't support spaces or commas, you can download a different keyboard or use new lines to separate the numbers.

One useful feature of this app is the "restore" button, which allows you to restore the last data you entered before closing the app. Additionally, you can long click on the display text or the numbers you entered to copy or paste them.

The app provides two input screens: the classic GCF screen and the new unlimited input GCF screen. You can switch between these screens by clicking the options in the top right corner of the app. If you don't see the option in the top right corner, you can click your Menu BUTTON, which is a physical button on your phone.