I have used a DiveVolk Seatouch 4 housing on maybe 20 dives. It is a passive (non-bluetooth, no electronics) product with a membrane which affords complete touchscreen capability. I've wanted to be able to use a phone underwater, especially after having mediocre results with a Vaquita (battery life, terrible minimum focus distance, pathetic macro attempt, and now, of course, bankruptcy) and, years ago, a GoPro. I did try a Sea Life iPhone housing, but it had many negatives: bluetooth required, exceedingly fiddly to prepare it for use, intrusion alarm has a mind of its own). I ordered and returned a DiveVolk without getting it wet because the membrane was hard to get my mind around. Matthias Lebo's good reviews on YouTube, and dissatisfaction with the Sea Life, led me back to the DiveVolk, which is inexpensive @ $199. I've found no reports of a membrane failure, and given the water resistance of the newer iPhones, think that if there was some intrusion, I'd have a decent chance of getting to the surface in an orderly fashion. If not--insurance, if you're using a primary phone. For an occasional user like our OP, the absence of any serious learning curve, batteries to be charged, pump to be remembered, etc., combined with the superior imaging abilities of the iPhones (especially those which shoot raw images), the DiveVolk is worth considering. Linking a couple of images here.
Macro ;
Panorama