A second problem is web-/app-based farm management solutions place at loggerheads two qualities of good farmers: 1) progressive use of technology to increase profitability; and 2)the natural resistance to tell anyone what they've paid for inputs (land, machinery, seed, fertilizer) and what they're being paid for outputs.
Farming is a business, and by giving out too much information, farmers risk being out-maneuvered by their competition. Whether the competition be another farmer discovering what's being paid for cash rent and offering $5/acre more, or a hedge-fund gathering up real-time planting and yield information to play the CBOT/CME.
On a personal note, I've been involved in farming for 45+ years. My dad 80+ years. When explaining taking the information about the farm and crops and giving it to a company, my dad--who's never used a computer in his life--just stopped me and said: "That information is a new commodity they'd be getting for free to take and sell, and we'll never see a penny of it. "
Something for farmers to consider.