I've always been pretty rubbish at sums so having a calculator on my phone is perfect for me when I'm out shopping or gambling. The built-in calculator on my cell is OK, but a little boring and cumbersome for my liking.
Free Simple Calculator is an interesting alternative that is designed to make solving mathematical riddles all the easier, as the name suggests.
The app can perform addition, subtraction, division and multiplication. The best part of the program is that each of these functions can be mapped to a different button on your phone, making for quicker solutions.
All you need to do is enter the first number in the equation then tap the relevant key and, hey presto - problem solved.
Ultimately, Free Simple Calculator can only perform basic equations, but for performing quick sums on the hop, it works well.