The free version is very annoying (intentionally I am sure) by frequently putting an ad page up when you try to use it. In fact, at some times, it is impossible to use because you cant keep the ads away.
The ad free version is great, however, if you dont mind laying out a few bucks for the purchase. The only problem I have with it is that IF it allows you to ask for words incorporating one or more letters at beginning or ending, it is not at all clear how to use that feature. The app seems to have been updated to match more of the accepted words than older versions too. Thanks for that. I had stopped using it for awhile cuz of that.
DbySea about WWF Helper Premium, v3.0