When I go to the play store, it tells me that my phone "isn't compatible with this version" and I'm not sure what to do, there aren't any suggestions there to go off of.
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When I go to the play store, it tells me that my phone "isn't compatible with this version" and I'm not sure what to do, there aren't any suggestions there to go off of.
What device is it? If it is an S3 or something older it probably has hardware limitations that will prevent certain apps from being compatible. Pokemon Go is one for example, that requires a certain spec of gps so it is not compatible with older devices.
In addition to Jeff's answer, some apps require your Android OS to be of a certain version or higher.