Hi, our software not totally free, but very cheap (see pay-as-you-go pricing option).

Here is the demo, 1 min youtube video.

Satellite imagery data from 1988, field potential maps (also auto-generated), lidar topography and you can analyze your soil, yield data.

Free trial (1 month, 250 acres) w/o payment info. 

You can buy Planet 3m data later image by image when needed.

Documentation with demo at docs.geopard.tech

Let me know if you have any questions.