I also would like this feature for tallying birds during sage grouse lek counts. It would be great if I could add +/- buttons for Male, Female, and Unknown so our biologists can efficiently tally the birds while conducting their counts. In addition, there are numerous other surveys we do where counts of various resources are tallied when using paper data sheets and if we are going to transition to digital data collection we need a way to capture this ability to quickly tally counts into various categories.