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Okay, let’s be fair: No one expects a company to develop an app with no reward for their work...so I expect ads, and there’s nothing wrong with that. If I like the app, I may purchase the ad-free version. The problem: This apps ads are time-consuming and intrusive. I need to use a conversion app during time-sensitive preflight planning, to convert different charts with different measurements...to determine if it’s safe to fly in remote areas. I don’t have 30-60 seconds every few minutes to watch an ad, nor do I need to lose my train of thought when I’m making decisions that could literarily kill me or others. So I cannot “try before I buy” with the ads this app uses—I cannot “give it a go,” the ads are too distracting for that.

Why can I have the same calculator on my iPad mini as I have on my iPhone? I HATE the calculator on my iPad mini. I have to be interrupted with my calculations by stupid commercials I don’t want to see advertising stupid products I refuse to buy. Many times they are games that I don’t want to play. The calculator is difficult to manage. I want the same calculator that’s on my iPhone! I’ve rated this one star but I would’ve rated it zero star if possible. Get with it Apple!!

the current update does not work properly on the lastest ios 9 version. It does not show the scientific calc any more (by default) thus making it rather useless at the moment. Also I cannot select any other free themes anymore as the app claimes there are not ad clips available and I thus find myself unable to change the theme. It also shows ads even though i purchased the ad-free version.