EASA / the ECQB mandate the content and scoring (MCQ, four options, one correct, 75% pass,
no negative marking) but not the visual interface — so every aesthetic choice here is driven
by usability research. The highlights:
🎛️ You control font size, theme & timer
The core e-exam interface study found interface preferences are individual and stable — there is
no single optimum. It defines nine adjustable features (font size/face, colours, timer style,
questions-per-page, alerts). So FlightDeck ships strong defaults but lets you adjust.
Abdel Karim & Shukur, Computers in Human Behavior (2016)
👁️ Visible system status, always
Timer, question number, answered / unanswered / flagged state, and a jump-to navigator grid are on
screen at all times — so you recognise your progress rather than having to recall it.
Nielsen's 10 Usability Heuristics
🔤 Sans-serif, generous spacing, short lines
Question text is a sans-serif face at comfortable size, with line length capped near 64–68 characters
and 1.5 line-height. On-screen reading research shows sans-serif + spacing reads faster, and lines beyond
~70 characters slow the eye.
Hojjati & Muniandy (2014); Nanavati & Bias (2005)
🌗 AA-contrast colour, never colour alone
All text clears WCAG 4.5:1 in both themes; correct/incorrect states use an icon and colour so
they work for colour-blind users. Text scales to 200%+ without breaking.
WCAG 2.1 AA (1.4.3 / 1.4.4 / 1.4.11)
🧠 Minimalist, thumb-reachable, low load
One question per screen, nothing decorative competing with the item, and all primary actions in a fixed
bottom bar within thumb reach — reducing extraneous cognitive load on mobile.
Mobile-learning heuristic evaluation (IJACSA, 2024)
🔁 Two modes + spaced repetition
Study mode gives immediate layered explanations (summary → why distractors fail) and a confidence rating
that schedules your next review; Mock mode mirrors the real ECQB (timed, marked at 75%, no feedback until
the end). Patterns proven by UWorld, Anki, Quizlet and the leading ATPL banks.
Competitive UX analysis · Anki FSRS · UWorld