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Apple's opaque and restrictive policies with regard to app approval remain a disincentive for many iOS developers. Google's apparent aloofness over fragmentation and device standards in Android makes it difficult for app creators to support the growing variety of screen sizes and hardware specs that Android comprehends; and by Google's own admission, Android 2.x and even the forthcoming Android 3.0 are not optimized for use on a tablet. For its part, Microsoft's Windows 7 isn't optimized for touch as Android and iOS are, and that deficiency will make it harder for users to select appropriate software to use on their Win 7 tablets.