Cross-Platform Exam Prep App Development -- 2

I'm seeking an experienced app developer to create a professional, formal-styled quiz app for both iOS and Android platforms.

Key Requirements:
- Multiple-choice questions: 1000 questions, 4000 answers.
- Exam simulation modes:
- Answer questions one-by-one.
- Randomize the order.
- Answer just 100 random questions to simulate exam.
It should show the progress,
- Pass requirement: 70% correct answers

- Promo code feature for discounts/free access..

Ideal Skills:
- Cross-platform app development
- Experience with multiple-choice quiz formats
- UI/UX design for professional apps
- Knowledge of promo code integration

Looking forward to your offers!