https://cleanupphotos.com provides a mobile/desktop interface for editing photos simply using your thumb/mouse to drag boxes (automatic) or brushes to remove unwanted objects. It’s free!!
We will definitely keep it free. We are still trying out different business plans and will leave this answer open for now. Sorry for the vague response.
@Wistar I'm over the moon hearing this and would love to make this official asap. Could you please shoot us an email at support@cleanupphotos.com so we can get you at least onboard with a beta? I'm so overwhelmed to hear serious users willing to support us!