The company behind this, LexTech, started by selling literally the world's most expensive iPhone app, which was an $899 mobile VMS client in 2009.
As every VMS manufacturer released their own free (or nearly free) VMS client, LexTech moved to being a 'mobile PSIM', now LexRay.
This is essentially a comparison to traditional PSIMs, offerings like Nice Situator, ADT Proximex, CNL, Vidsys, etc. that typically sell for hundreds of thousands of dollars. So price is definitely a key consideration as such offerings can get very expensive.
The other (obvious) big thing is functionalities - which can vary greatly, such as:
- Do they support all your recorders out of the box without doing any new development?
- What type of integration do you want with other systems, like access or intrusion? Does LexRay provide that?
- How much desktop monitoring do you want to do?
- How about incident reporting capabilities?
Overall, LexRay is a niche player but so too is pretty much every other PSIM.
Tread carefully, lots of buyers for this type of the solution wind up regreting their decisions.