Can anybody recommend an accessible db meter on iOS?

iOS & iPadOS

Hi folks,

I'm going to be handling live sound duties at a few gigs in the near future. To stay in line with licensing laws, some of the venues I'll be in have to be careful about how loud the bands are at certain times. Most sighted sound techs seem to be using stand-alone gadgets to measure this, but of course, none of these are accessible. There are a few apps that seem to provide accurate enough readings to get by judging on the reviews, but have no idea whether any of them are accessible. So, before I start purchasing at random, I thought I'd come here and ask whether anybody has had previous experience?

Thanks in advance for any pointers.