P4 is very good. It would fit your needs nicely. I did find out that a cheap Android tablet isn't up to the task of running the app very well however. If you are going to use it to record where tile was installed, I'd highly recommend using DroneDeploy (or something similar) to take pictures and get a geo-referenced file that you can import into software, even if you don't use any sort of farm mapping software now, it might be useful to you someday. And you can still just simply look at the detailed picture you would get from there without mapping software.