App for IOS and Android

I am looking for a simple app to calculate position sizing for FX trading

Please see below the example of this app should do based on a web version on Myfxbook

https://www.myfxbook.com/forex-calculators/position-size

For people who have experience in Financial Markets this should be an easy and quick job.

Please see my website www.exacttrading.com to be better understand the company name and colour scheme which could be used. Thx