So here is the deal - just to clear a bit of misconception. Apex is perfectly fine managing a system unattended to include trans Pacific and trans Atlantic oceans. I'll lay down another misconception in that the GHL will also do the same. They both work. I can't vouch for it because I do not run one but there are plenty of hobbyists do. I've traveled and my tank was fine. It didn't care that an apex was watching it or my dog.
I'm not going to get into insert your favorite contest here but one really isn't better than the other because that isn't really factual but rather biased and opinionated. One has a presumed bigger user base in the US while the other has one in EMEA. Other than that you more often than not will read what isn't working or currently frustrating users compared to people posting golden bombs of light and love...just how social media works.
With that out of the way
@Marina 34217 you asked a rather interesting question. Should you buy a controller of X brand when most if not all of your equipment has inter connectivity and app coverage. I like it I must say. Smart. Honestly, I don't know. I do not use it so can't comment on it but if the application lets you do a majority of what you want then the short answer is no. I wouldn't waste the money should the app let you do what you need. Feed modes, lighting control, pump adjustment. On the other hand I would recommend this if you haven't:
1. Make a list of what you would like to do today, and tomorrow (future)
2. Monitor / heart beat (reach back ping (water leak, circuit breaker trip, or simple network outage)
3. Automated testing (GHL down the road, Trident today, others)
4. Custom lighting profiles
5. Fancy feed modes
6. Automated water changes
7. Dosing
Ignore the brand of the controller for a minute but rather see what your vision is. It may help answer the question. I think the inter connectivity is a interesting idea. In my case I'm already invested in a controller so it wouldn't be something I would consider. But as I said I think it is smart. As is what other plans you may have in store.
For the record I use Apex but have been a long time Neptune customer. However, I do try and remove my bias hat when I answer questions like these. Controllers help and can do some amazing things but they are not critical pieces of equipment for a successful reef. They are a tool to use. And what is more important than the controller is designing your system with some redundancy in case the brown stuff does hit the whirl thing. Be it a return pump or controller batter back up or even as simple as a reach back heart beat notification (search on BRStv 165 I think it was, their tank failed due to a circuit breaker and not having the Apex heartbeat enabled that would have saved it).
Hope this helps. Great question.