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The main change to the free version of Anagram Solver is that now there are several links to the Pro version on the Google Play Store. There is a link on the menu, on the about form and a reminder every 50 queries.
Both apps are compiled against the latest Android SDK, API 21 (Lollipop). I've updated various copyright notices with the year 2015.
There was a comment from one user saying they were initially confused, so I swapped tips 1 and 2 so that the anagram tip first appears on the tip box. Most folk who use the app use the anagram search feature. Click the Google Play Store badge to see the free app: