Moon Phase Pro Beats Wolfram Alpha As No. 1 Android Book

After almost four months of dominating the No. 1 slot in the Android Books & Reference App Top Ten list, Knowledge engine WolframAlpha has been replaced by Moon Phase Pro and has slipped to No. 2. The app has led the list since we started counting at the beginning of May.

The new bestseller, Moon Phase Pro, has long been in the Top 10.The app includes 3D interactive displays of moon phases, angles, rise/set times, & nearest syzygies.

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