Dear Developer(s): Based on the high number of complaints here, it is quite clear that the vast majority of users are discontent with the inclusion of ads in what otherwise is an excellent learning tool. For an app which its only purpose is to educate by providing visual information, it is quite distracting to see ads in motion when people’s focus should be solely on information content. I understand that a project like this needs financial support in order to sustain continued development. This may be the reason why you resorted to the ads. But please, consider offering an ad-free, pay version. I am confident the majority of us users would be happy to buy it to support your cause.

This app is loaded with great features. The developer effectively has managed to make it fully functional without compromising simplicity, clear testimony of good design principles. The passion put into it is palpable. I even look forward to a new icon with every update! I highly recommend buying the extras package, not only for the features it adds, but also because it’s supportive and well deserved.

Don't waste your money or idevice space. This app doesn't work at all. It just kept spinning and spinning and never gave me a repair estimate before or after this update. Also, it appears it doesn't give you the option to save information for offline use. This is important for iPod users. Save your money.

No issues so far. And a pleasure to look at.