Has anybody else tried Focus Camera?
Focus - RAW Manual Camera with Smart Focus Peaking by Klinger
https://appsto.re/ca/9G2m_.i
I find it has a number of very useful features. The focus peaking really is good for situations when it's hard to tell what is in focus.
I can't tell if it was free or not since now I have the app the price no longer appears.
$1.99 at this time