I was lucky got the hub, thermostat and two TRVs for just over £100 last Feb. Then bought 4 more TRVs for the same amount. I wouldn’t have bothered if it wasn’t for WFH. But the boiler is on more, so I want that room by room control.I've got the wiser anarl. Scheduler is a piece of piss and can just bark instructions to google to turn it on when needed as well. Haven't bothered with the TRV's as the cost will mount up.
You’re right about the app, it is spot on.