This would be an amazing feature to add. I saw in a search that the topic was brought up and the response was it was discussed several years ago and decided not to have this feature. Has there been any discussion recently? With the increased use of technology and the push from National to make Scoutbook the official platform to track advancement, it would just make it that much more attractive.
Our Troop currently uses Troopmaster and whenever we have to renew the license it always comes back to not wanting to give up the option of marking off requirements (not just completions like the Internet Advancement offline option allows) as soon as a Scout completes it. It saves so much time after an event (like a Campout) when all you have to do is sync and not go back and enter everything from notes and allows for less mess ups with things being forgotten.