I have Aquatrax, as to how good it is I guess it depends on what you are looking for it to do for you (no, it doesn't change the water, or feed the fish when you're away lol!) and how much effort you are prepared to put into it in the first place to get accurate reports/alerts etc.
The first thing that struck me about it was that its fish "database" left a lot to be desired. It didn't even have Danios in there! You can edit the database, but I would have hoped the very basics would have been in there, since I did pay money for it. So the first downside, a limited database.
The one feature I do like, I think, is the alert system (but only when you open the software, not as any kind of desk top alert). If you take the time to enter details about your filter media, for instance, it will prompt you when it is due a change (or clean). I see this could be useful if you are likely to forget, or have many tanks to run...but then you only open one tank database at a time, so get one alert at a time. Ok, so the alert system is potentially useless too...unless you are highly forgetful, negligable or do not religiously open the program daily.
You can also enter in there when you perform water changes, and your water parameters, then the (limited) reporting system allows you to view trends such as average percentage of water changes a week that you carry out, and give bar chart graphs on what the program considers to be essential parameter trends. It is funny, you can record your KH and GH, Phosphates, salinity, Iron, Oxygen, copper, and Carbon Dioxide, BUT only Ammonia/Nitrite/Nitrate and PH show up on a bar graph (therefore you cannot follow trends over time) the others are not considered "essential" which may render the reporting feature at best minimum, at worst useless for marine or reef tanks (or even for the heavily planted aquascaped tanks).
As with any piece of sofware, it is only as good as the information you put into it, and on the surface it does feel a little basic. That said, I think this software has potential, but much of the effort is left to the user (for instance, to ensure that the fish database is as complete as their own knowledge/research allows) etc.
To summarise, this software is not a quick fix way of alleviating human responsibility, or effectively minimalising the management of your tanks, since it is merely a resource for recording as much as you are prepared to put in, with little proactive support (a nice feature would be a fish compatibility warning, for instance) but then, I guess, if we were to be able to pay £15 for a piece of sofware that did all of this, and took the effort out of fishkeeping...we would be fish havers and not fish keepers. Where would the fun be then?
