I've released v.1.7.0 with bunch of performance and bug fixes. The big deal for me personally was to enable browsing and caching on the fly while cache queue is busy processing big recursive area tiles saving.
I've introduced mobile ads in this version. It starts to show and occupy top 50 pixels of the screen at the time when caching queue reaches 30 tiles. Well, I hope it's not very annoying. This approach in monetizing might prove itself not worst the hassle though. Will see. By number of reasons paid-no-ads version is not coming to market at least yet.