Seven exams, five authorities
Ten questions per exam, answered on the page, with the reasoning and the rule behind each one. There is nothing to sign up for and nothing to install first.
Practice tests for these exams have a reputation problem, and it is deserved. Wrong answers survive for years in apps and on forums because nothing in them points back at a source, so nobody can tell a mistake from a rule they had not met yet.
Each question here names the paragraph it tests: the section of 14 CFR, the article of Regulation 2019/947, the section of TP 15263, the part of CASR Part 101. When you disagree with an answer you can go and read the rule, which is the only way this kind of material should work.
These pages carry ten questions each. The app carries the whole bank, 1342 questions across the seven tracks, free, with the same explanations and the same citations. It also schedules what you review, so the material you keep getting wrong comes back sooner. One payment of 24.99 adds the full mock exams at the real length and clock. It does not renew.