This apps is both a calculator and an arithmetic questions generator.
You can tailor-made your own Maths Quiz by setting different time limit, number of digits and number of question in each round. So you can set suitable level of the questions for your own.
The main feature of this apps is that it looks like a calculator. It means that you look like as if you are using calculator for work or for homework while you are actually practicing mental calculation. This apps can also switch to a real calculator immediately in urgent cases.
In Calculator mode, you can input many number and signs just like 1+2*3+4/5 before you enter the equal button and this apps follows the orders of operation. This means that you can check whether you have input the correct numbers when you have a lots of number for additions, subtraction, etc.
This apps is for fun, so no advertisement in the apps and no permission requested. Feel free to download to try the apps.