No export to camera roll
1. Create a shared album on your phone that only you have access to then use the “add to shared album” option. Then go to the shared album on your phone and tap the 📤 share/export button and then select the “save image” option. Now the image is in your camera roll.
2. Select the “save to files” option. If you plan on saving more than 1 image from this app, I suggest naming the image. Otherwise the image name will always be “PNG Image” and you will get a prompt asking what to do with the identically named files. Then navigate to your “Files” app and select the photo you want and tap the 📤 share/export button and then select the “save image” option. Now the image is in your camera roll
3. Select the “copy” option then paste into your notes app. Then from the notes app, press and hold the image and select “Share” and then select “Save Image” Now the image is in your camera roll