EDIT: eh, apologies for the unsolicited other-optimising. I really need to stop doing that.

I've been using Noom recently. It's a weightloss app but I'm finding it to have a decent level of granularity for food logging and it nags you every 4 hours or so if you haven't logged anything in that time, which can be either a good or a bad thing depending on how often you expect to have food to record. I pretty much entirely ignore all the other stuff it wants me to do.