Photo Checkup

On iPhone or iPad, Photo Checkup reads the items you let it access and puts anything that won't load into one of four groups: possibly corrupted, iCloud original not on the device, unsupported format, or couldn't verify. You can see all iCloud findings for free, with steps to try. Analysis stays on the device, and scans don't download iCloud originals. Quick Scan is free. A one-time purchase adds the full possibly-corrupted list, Deep Scan, and Verified Export, which copies originals to a Files folder and checks every copy by SHA-256. It doesn't repair files.