PhotoSpace moves items to Recently Deleted in Photos, so you can undo. They still take space until you empty it: in Photos, open Recently Deleted (under Utilities) and choose Delete All. Photos also empties it on its own after 30 days.

In PhotoSpace, on the Compressed copies page – click one to play it. In Photos they are in the album Shrunk by PhotoSpace (My Albums), and in the library at their original capture date.

Yes, for 30 days. Open Recently Deleted in Photos, select the item and choose Recover. After a compression you can recover the original and delete the smaller copy.

No. Nothing is removed until you click a button, and Photos asks you once more before anything goes to Recently Deleted. PhotoSpace never empties Recently Deleted – Apple does not let other apps do that.

A 4K video becomes 1080p HEVC. On a phone or a TV it looks the same for most people, but fine 4K detail is lost for good once you empty Recently Deleted. Try it on two or three videos first and play the copies before you go on. Slow-motion videos are never compressed.

Some videos cannot be converted (for example a damaged file or an unusual format). PhotoSpace then keeps the original untouched and moves on. If the video plays in Photos, write to us with the message shown in PhotoSpace.

You allowed access to selected photos only. Go to Settings → PhotoSpace → Photos and choose Full Access.

Use the same Apple Account, open PhotoSpace and choose Restore Purchases in the Pro window. One purchase works on all your devices.

Purchases are handled by Apple. Request a refund at reportaproblem.apple.com.