Extrex

In addition to calculators for Android devices there is a huge number of different computing applications. For example, the Grand Tools, which combines several small programs. QE will help you calculate the roots and discriminant of the square equation.

Value performs simple mathematical actions with two numbers. Randomer produces a random number in the specified range. FastNote allows you to create notes. And finally Books contains various quotes and expressions.

If you are a mechanic, an electrician, or a general technical engineer, a simple calculator will give you as much as recording on a recorder when you wanted to watch a movie on DVD. For example, RealCalc will come to your aid in this case. This is an engineering calculator, made in the style of ordinary "live" calculators of this type.

There are already roots in degrees, fractions, the ability to count both in degrees and in radians. Intuitive interface without a pile of unnecessary superstructures and submenus. This calculator has as much as 10 memory cells. It is possible to see the history of calculation results.

Plus the "keep screen on" feature so that the phone screen does not go out while you record the results.

The creators of Alarmy claim it as the most annoying alarm clock in the world. There is an unusual reason for this. In your home you set up a registration point and to turn off the alarm clock call, you need to place your phone at this point. Otherwise, it will keep ringing. For some people this is already too much. The application also includes various tasks and puzzles that you need to solve to turn off. This is one of the most creative applications on our list.

Quip is not just a fast notebook, it is a mobile office for Android. In the free version of the application are available all the necessary basic functions (record keeping, information storage, media files, etc.), and in the paid version - the possibility of teamwork.
Features of the service: sorting documents and folders; history of editing; ability to create task lists; shared access and chat; reliable protection of privacy; integration with Microsoft Excel, Dropbox, Evernote, Salesforce, Gmail, Zappier, etc.; import and export of files in PDF format and Microsoft Office.