ExplosionMotor vs RunPee

Discover what happens inside a 4-stroke engine. 4-Stroke Engine is an educational app designed to make the basic principles of internal combustion engines easy to understand. Learn the four stages of the engine cycle: • Intake • Compression • Power • Exhaust The theory section explains the key concepts step by step, helping you understand how the piston, valves, combustion process, and other engine components work together. Educational videos complement the theory and provide a visual way to understand the different stages of the 4-stroke cycle. Whether you are a student, an automotive apprentice, a teacher, or simply curious about how engines work, the app provides an accessible introduction to the fundamentals of 4-stroke engines. Learn at your own pace, connect theory with visual explanations, and discover how combustion is transformed into mechanical motion. • Engine Simulator Drag the RPM slider and watch the piston, connecting rod and crankshaft move in real time. Hear the engine note rise and fall, and follow live RPM, stroke and temperature gauges. • Parts Explorer — Tap any part of the engine to discover what it does: spark plug, piston, connecting rod, crankshaft and more. • Quiz — Test your knowledge of the Intake, Compression, Power and Exhaust strokes and beat your best score.

You know that feeling. You're watching an amazing movie, your drink kicks in, and you're stuck choosing between missing a key scene or suffering through the rest of the film. RunPee solves this. We tell you the best times to take a bathroom break during a movie — without missing anything important. RunPee is 100% free and supported entirely by donations from our community — no paywall. HOW IT WORKS Before the movie starts, look up your film in RunPee. You'll see a list of Peetimes, each carefully chosen by our expertly trained staff. Peetimes are scenes in a movie, usually 3-4 minutes long, that are easy to summarize without missing anything important, like a dramatic scene, or funny moment, or exciting action. Each Peetime includes: • When to go (a cue so you know exactly when it starts) • How long the bathroom break lasts • A short summary (hidden unless you tap) of what happened, so you don't have to ask anyone, "What did I miss?" Start the RunPee timer when the movie begins. The app will gently vibrate 30 seconds before each Peetime starts, so you're never caught off guard. ANYTHING EXTRA AFTER THE CREDITS? Wondering if there are post-credits scenes worth staying for? RunPee's "Anything Extra" feature tells you — without spoilers — whether there are mid-credit or end-credit scenes after the movie. No more sitting through 10 minutes of credits for nothing. PEETIMES FOR EVERY NEW RELEASE Our team watches every major release and hand-picks the best Peetimes. New movies are added weekly. We've covered over 1,900 movies and counting. DESIGNED FOR THE THEATER Dark theme, silent vibration alerts, minimal screen brightness. RunPee is designed to be invisible to everyone in the cinema except you. NOW IN 42 LANGUAGES Available in English, Spanish, French, German, Italian, Portuguese, Turkish, Japanese, Korean, Chinese, and many more. Take RunPee to any movie theater in the world. TRUSTED BY MOVIEGOERS FOR 18+ YEARS RunPee was created by Dan Gardner, a moviegoer who had one too many badly-timed bathroom breaks. What started as a simple idea in 2008 has grown into the original movie bathroom break app, trusted by hundreds of thousands of movie fans worldwide. WHY MOVIEGOERS LOVE RUNPEE • Never miss the best scenes during a movie • Know exactly when to take a bathroom break • Find out if there are post-credits scenes — for free • Human-curated Peetimes, not AI-generated • 100% free and donation supported — no paywall, no subscriptions required • Perfect for long movies, overactive bladders, or anyone who drinks too much soda at the theater Download RunPee — your bladder will thank you. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.runpee.com/privacy-policy/