Find quick answers to common questions about practice modes, billing, certificates, and technical support.
Managing your username, email verification, Google sign-in, and password resets.
Go to the Login screen and click 'Forgot password'. Enter your email address and we'll send a password recovery link valid for 1 hour.
Yes. If your Google account uses the same email address as your DevDrill account, both methods will log you into the same profile securely.
Timed assessment rules, score calculations, bookmarking questions, and language levels.
Your current answers are saved in localStorage. When you reconnect, DevDrill automatically re-synchronizes with the server.
Yes. You can retake any assessment. DevDrill will track your score history and update your personal percentile rank accordingly.
Upgrading to Pro, cancellation policy, 14-day refund guarantee, and invoices.
Yes. You can cancel at any time from Settings -> Billing. You will retain Pro access until the end of your current billing period.
We support major credit/debit cards (Visa, Mastercard, Verve, Amex) and local bank transfers via Paystack/Stripe.
Blockchain credential verification, public profile sharing, and exam requirements.
Every certificate has a unique cryptographic hash and a public URL at devdrill.com.ng/verify/[id] showing syllabus completion and test scores.
A cumulative score of 80% or higher is required on the final 30-day exam to earn a verified certificate.