The OP app is not for monitoring your crypto assets if I get it right, but just to calculate what profits that you would get and when you should sell your assets if you want a desired percentage of profits. To put it simply, a calculator to help you sell your crypto assets. Tbh I think the demand for such app is relatively low because you can just simply calculate it yourself with a simple math formula.
Actually, most people would prepare an easy way to manage their portfolio and these two below are working well.
Just had some note on blockfolio because lately, it not fast anymore since I updated it.