SKRWT wasn’t working on my iPhone 14 Pro Max, clicking done got you an endless gear animation. The App Store didn’t show an update available, and the app itself doesn’t show a version number.
But on a chance, I deleted SKRWT and reinstalled, quite obviously it’s a newer version, I assume version 1.5, and all is well.
I should note that, as far as I can tell, there is no working support available. Tapping the app support button in the App Store listing loads their website, which has a totally nonfunctional contact button at the bottom.
I should further note there’s no version history shown. And to add to the mystery, when I set up my iPhone 14 Pro Max in October 2022, it appears the old version of SKRWT was pulled from the App Store, very strange.
And this Just in. What wasn’t working, and what still isn’t working, is launching SKRWT from within the Photos app, same failure to save as described above. So the installed version had no doubt been up to date.
Conclusion: launch SKRWT directly, not within the Photos app.