How Keyholding.app Works:
Lock your physical key in a safe or lockbox with a combination. Upload the secret combination to the app. It stays hidden until the timer runs out and it's time to unlock.
Lock your key
Put your key in a safe with a random code you don't look at.
Upload the combination
Photo or enter the code into the app.
Scramble the code
Scramble and delete. Hidden until unlock.