To all my readers: I'm terribly sorry that I had no opportunity to answer your comments and write new posts for almost 8 months. All this time I have been working on a rather specific project, it will be released soon and I'm going to describe it in details ASAP.
Also I have developed my first Android app a week ago, basically to satisfy my own needs, to gain new experience and just for fun: Keeyper Password Manager. This app is available in two versions: free and paid (~ $1).
If you are willing to support and donate me, you always may buy the paid one ;-)