Apps like 8X3

Since 8X3 hasn't got updated for over a year, I can't install it on my new phone from google play store, because it works only for an older version of android system. Do you know any free app that works just like 8X3 and can be used on phones that work with newer versions of android? Or is there any other way to access 8X3 than installing and using the old app? Please help, 8X3 was very useful and helpful for me when it comes to calisthenics and bodyweight training. Does anyone know if I can somehow replace it?