Thanks for studying with CISSP Vault. Questions, bug reports and feature requests are all welcome.
Is my study progress backed up?
Progress is stored on your device only. Deleting the app deletes your progress,
so keep the app installed while you study.
How do I restore my Lifetime Access purchase on a new phone?
Open the app → Settings (gear icon) → Restore Purchases, while signed in with
the same Apple ID used for the original purchase.
How does the free preview work?
New users can answer up to 30 questions within the first 24 hours. A single
one-time purchase unlocks everything forever — no subscription.
How does the Adaptive Exam pick questions?
It simulates a CAT-style exam: question difficulty adapts to your performance,
domains follow the official exam blueprint weights, and the verdict uses a
95%-confidence rule — just like the real testing experience.