I've got the official Daikin wifi adaptor, which I installed within the heatpump. It's been rock solid and I use Home Assistant to control it and set my schedules etc.
Which Home Assistant is that? I've got the official Daikin wifi adapter and the Daikin D-Mobile app. The app is miserably slow and doesn't always work.
Home Assistant is an open source home automation controller software: https://www.home-assistant.io
They have a Daikin integration: https://www.home-assistant.io/components/daikin/
It is more involved than just installing a phone app, but super powerful.