Hey all, I am looking for recommendations for a SPL / RTA app for the iPhone. I know this has been asked previously, but the prior thread was back in 2017; and offerings in this area change pretty fast. I am not looking to conduct scientific studies or manage a studio with it. It's just to keep the band playing at an acceptable (or management-mandated) level, and for identifying feedback frequencies. So, the SPL meter doesn't need to be super-accurate, and I am okay with using the built-in mic; and the RTA just needs the basics. It is difficult to tell what some of these apps have to offer for a reasonable cost, since many have gone to the free-to-download model with in-app purchases. I don't mind paying for a good app, but many have also gone to a subscription model. I would prefer to pay once and be done with it. I already too many monthly subscriptions nickel-and-diming my bank account. Thanks in advance for any suggestions.