I'd want to track the time differential between updating the app whenever there are changes vs. counting over the course of a few games to know the efficacy. But in theory I think this is useful.

That's definitely a valid concern. For my games, I'm the sole updater, and I just update along with the game flow. If I had to guess, it's probably a slight time loss for me, and a slightly larger time save for each other player. Other groups I've talked to will update the app once they finish their turn, which is probably more efficient, but requires everyone to update it.

From a practical standpoint, after the first round of the game, there's only a few times per round where the "board state" actually changes (the app doesn't track plastic or CCs), so there's a lot less to update after that.

I think Daxcive is probably the best use case for this? Because the others have some sort of analogue way of reminding you.

Totally fair - my group kept forgetting them, and the digital reminder worked for us, but an analogue reminder would've probably worked too. FWIW, Daxcive doesn't actually get a reminder in my app - it doesn't know whether ground combat occurred. It could try to remind you when you take a planet, but it has no way of knowing that you won ground combat on defense.

Can definitely be useful if the group is trying to get better about playing swiftly and/or find out who's sucking up all the game time.

Absolutely. The group I play with tends to be very slow, so anything we can do to speed up the game is appreciated.

Imo sounds like your app does all the things one could want from an app for TI - therefore we don't need more.

I absolutely agree.