Hi everyone,
Thank you for all answers and options.
Besides school question bank (ATO in Lihtuania) I've been using airquiz on PC and PPL-App (recommended by friend and found on Appstore, not sure if available for Android) on my IOS.
So far I've found out that for example for navigation subject both q/b are quite useless when it comes to questions of determining position on defined radial or apprx. positions on VFR charts etc. since airquiz nav questions are based on UK VFR chart and ppl app on Sweden's... one good thing about ppl app is that for many questions there's a screenshot of that particular chart section...
For sure it is worth to invest in other q/b's than those provided by ATO because I've met some questions that were never discussed in any theory book (I'm a distance student, not that easy to ask an instructor) and that's how I've avoided surprises at CAA exams, or some questions look at one problem from absolutely different perspective and makes me think in a different way to find the same answer.
Excuse me for my English.
Fly safe!
M_N