I built I'm OK to help my own parents. You set a reminder for someone you love (Mum's tablets at 9, Dad's appointment, "text me when you're home") and it arrives on their WhatsApp with a Done button. When they tap it, you see it's done. If they forget, I'm OK lets you know, so you can check in.
Nobody installs an app, so it works for parents who never would. You can set a reminder up by typing or with a voice note. It also includes a daily I'm OK check-in for people who live alone and a safety word that alerts your people at once. Free to start.
