I just happened across this old question. It's short enough that I might as well quote it in its entirety:
Are there any serious smartphone apps for handling combat in a LARP situation?
I've seen several apps that aren't seriously meant to be used - are there any ones which are meant to be used, and have actually been used by players?
Now, that's pretty vague. As in, I can't really think of anything more deserving of a "too broad" close vote than that.* At the same time, it's also arguably a shopping question, not to mention unclear.
The question also has one answer† which, despite the broadness of the question, doesn't even actually answer it. All it does is recommend a dice roller app and a wiki, which the answerer's group uses for character stat tracking, but "they do not use them for LARP combat".
Personally, in its current form, I feel that the question is not making the Internet a better place. Basically, it's distracting click bait that contains no useful information on the topic it claims to be about. To become useful, it would need to first be clarified and substantially revised by its author, and then be properly answered in its new and improved form. Or we could just delete it and let someone ask a better question about the use of smartphone apps in (certain types of) LARP combat if they want.
That is, we could do any of those things if the question wasn't locked. But it is. So I can't edit it, I can't comment on it, I can't downvote it and I couldn't answer it even if I wanted to. And I can't even flag it for moderator attention and suggest deletion, because "Historical Significance" locking prevents that too. Hence this meta post.
So, what exactly is supposed to be historically significant about this particular broken window? All I can see is that it's old and has a surprising number of upvotes, presumably because people weren't so clear on what constitutes a good and answerable question here back in 2011. But is that really a good reason to keep it around, and not even allow it to be improved in any way? Or should we just get rid of it?
*) Besides the issues raised in the comments, it doesn't really help that there are so many different ways of simulating combat and modeling injuries in LARPs — from live foam weapon combat with one-hit kill/injury to D&D-like hit point mechanics to rock-paper-scissors to laser tag / nerf guns to "shooter decides if shot hits, target decides injury" to "no serious combat, fisticuffs are OK if both players agree" to "no fighting, period" — and that the OP hasn't specified in any way what background they're coming from or what kind of systems they're interested in, other than that they should be "seriously meant to be used" and not "relatives of RPS". And they can't edit the question to clarify it even if they wanted to, because it's locked.
†) There's another deleted answer, but it's even worse. And deleted.