Who came to mind?

Type their first name and we'll make a small link that says you're checking on them. You send it yourself. They answer in one tap — no app, no account, nothing to install.

• You send the message from WhatsApp, texts or email. CheckOn never contacts anyone for you and never asks for your contacts.
• The link holds no personal details, works for a week, and does not track anybody's location.
• It asks one question: how are you. Nothing more is shared unless they choose to.