InterviewOS vs Phisios

Stop memorizing. Start mastering. InterviewOS is your all-in-one interview preparation app built for Flutter and Swift developers. Whether you're preparing for your first junior role or aiming for a senior position, InterviewOS gives you everything you need — lessons, exercises, quizzes, and real interview questions — all in your pocket. **Pick your track. Start learning.** Choose Flutter/Dart or Swift/iOS as your main focus. All content adapts to your selection — from beginner fundamentals to advanced topics. Switch tracks anytime. **Duolingo-style exercises** No boring walls of text. No typing long code. Just quick, tap-based challenges you can crush in 30 seconds: • Multiple choice questions • Fill-in-the-blank with word banks • Drag-to-reorder code lines • Spot-the-bug challenges • Swipe true or false • Match-the-pairs **500+ interview questions** Real questions asked at real companies. Organized by topic and difficulty — from junior to senior level. Each question comes with a detailed model answer, follow-up questions, and common mistakes to avoid. **General programming too** Not just framework-specific. InterviewOS covers REST APIs, WebSockets, design patterns, SOLID principles, data structures, Git, system design, security, and more — the topics every interviewer asks about. **Track your progress** Earn XP, level up from Junior Dev to Principal Dev, maintain your daily streak, and unlock achievements. See exactly where you stand on every topic. **100% free. No ads. No paywalls.** Every lesson, every exercise, every question — completely unlocked from day one. No subscriptions. No in-app purchases. No ads. Built by a developer, for developers. **Works offline** No internet? No problem. All content is available offline so you can practice on the subway, on a plane, or anywhere. Download InterviewOS and start preparing for the job you deserve.

PHISIOS — the physics of every shot. Most sports apps show you what to do. Phisios shows you WHY it works, by letting you feel the physics behind each sport. Each sport is a different physics domain. Read a short, illustrated lesson — then test your intuition: call where the ball lands, whether the arrow recovers, how much it drops. No formulas to memorize. Just the feel of the principle, the way great athletes know it in their hands. IN THIS RELEASE • Basketball -> projectile motion. Why every shot is an arc. • Soccer -> the curve. Why a ball curves mid air after shooting. • Archery -> the pin gap and the archer's paradox. Why an arrow drops more than you'd guess, and why it bends through the bow yet hits dead center. • Formula 1 -> the energy and forces. • Coming soon — pool (elastic collisions) and many more! HOW IT WORKS • Quick, illustrated lessons — tap through, no walls of text. • Call the outcome — put your intuition on the line and see if you were right. • Climb your Sports IQ and keep a daily streak.You can earn higher IQ by answering the daily questions as well! For the curious — athletes who want to understand their craft, students who want physics to finally click, and anyone who loves a good "oh, THAT's why." No account. No ads. Works offline.