Not bad, could be better.

First, loading takes to long.

While I like and appreciate how the developer has packed as much info as possible on-screen, in a readable way, they have made some UI mistakes and not maximized their use of the iPhone UI. For example, the ºF & ºC hotspots to convert the temps is a good idea, but making one look like a button, is not astetically pleasing. It would be better to just display the temp... say 17 ºc, and make the whole temperature an invisible hotspot to convert to ºF.

Next, the graphics, while excellent have a very distracting rapid animation. The animation speed needs to be toned down, and not trigger your orienting response (a reflex). Basically, clouds dont need to be animated, thats overkill. Maybe have cool animated rain or snow, for the times you have that weather.

A further irritation is the lame use of a tiny hotspot arrow to slide open the night data for a day. This is unnecessary, as the user would find it far easier to just hit the day (nothing else is hot anyway). More likely, if I want to see night data, Id just assume have it ALL (for all 7 days) slide open, or even just swap (maybe think user configurable!).

Basically, give the user options, and think about the UI more! Look at other quality uses of the UI for inspiration!

The data itself looks good, and appears to be good, but the other things make me want to delete it and just use the Aeroweather or even the default instead.

Patrick Waugh about iWeather Complete Pro