iT500 Plus 4+

I have has a Salus IT500 for a few years now and recently added a second zone to split my heating upstairs/downstairs.
The thermostat itself is fine and seems good quality and the app is pretty easy to use (TBH I almost never use the physical thermostat and mostly use the app instead).
There are however some glaring issues, the main one being that the app crashes nearly every time it’s opened. In fact, it happens so often that I now assume it will crash before I can use it. It’s been like this for at least a year - seemingly Salus are unable or unwilling to fix it.
The second issue is that the app doesn’t connect with any other applications, IFTTT, forget it. This means that you can’t really do anything clever and you basically just have a remote control for your heating. This wouldn’t be so bad if the app’s resident location functionality worked (which it doesn’t).
If I had my time again I’d opt for a more expensive smart thermostat from a different supplier.

IF YOU’RE LOOKNG AT HEATING SYSTEMS DO NOT CHOSE SALUS FOR YOUR HOME HEATING !!!
Had a Salus system with two zones installed over 3 years ago - wish now we’d chosen a different solution as the Salus controller and this IT500 app are too unreliable and several times we’ve been left unable to switch the heating on (serious given we care for a vulnerable 90 year old relative) - the whole system is WiFi dependent but the real issue seems to be at the centralised Salus end.
Salus - your developers need help … you need to add or increase competent, trained technical people … otherwise this product set will continue to fail and it could collapse as a division of your company (and I’d be willing to lead a class-action-style legal action for all us customers facing expensive replacement solutions!)

After a frustrating year with this I have updated the app a few times and am happy to say it is improving. It crashes must less, the hot water boost works and it’s generally better/faster. I still find myself manually adjusting the temperature a lot though (sensitivity issue for me - see below). 3.5 stars if I could give it that.

I do still lose a controller every now and then, taking the batteries out resolves (no use if you’re not at home tho!). And it’s annoying you still have to use all three hot water on/off times.

It would also be good to be able to toggle the sensitivity- if you set the temp to 20, it doesn’t turn the heating off until the temp is 21 etc. For me that is about an hour of over heating and half an hour later the controller registers another degree warmer even after the heating is off. I have a very well insulated house with small radiators though...