Spaced. vs Physics Handbook

Remember what you learn, one card at a time. Spaced. is a minimalist flashcard app for iPhone and iPad. Create decks for languages, classes, trivia, lyrics, work concepts, or anything else you want to keep in memory. Review with spaced repetition, and Spaced. brings each card back when it matters most. Why Spaced.? • Study less, remember more Cards you know well come back later. Cards you miss return sooner. Your sessions stay focused on what needs attention. • Simple, fast reviews Flip a card, recall the answer, then swipe right if you remembered or left if you missed it. No clutter, streak pressure, or complicated setup. • Make the decks you actually need Create your own collections, decks, and cards with text, images, and audio. Reorder things, search decks, and track progress per deck. • AI-assisted deck creation Use an AI assistant you already have to draft a deck. Paste the JSON into Spaced., review the cards, and add it to your library. Spaced. does not run AI inference or require an AI account. • Starter decks included Begin with built-in French, Indonesian, and Japanese decks, including Japanese kana with pronunciation audio. • Private by design No ads. No tracking. No Spaced. account. Your user-created decks and progress stay on your device and can sync through your private iCloud account. Spaced. is free to use, with optional one-time tips for people who want to support development.

Physics Handbook is an offline reference for school and first-year university physics: 168 articles in 17 topics, each with its formula, the symbols explained, a worked example and — in almost every case — a calculator. EVERY TOPIC IN ONE PLACE Kinematics, dynamics, statics and hydrostatics, work and energy, momentum and collisions, rotation, oscillations, waves and sound, molecular physics and thermodynamics, electrostatics, direct current, magnetism and induction, electromagnetic oscillations and waves, optics, quantum and atomic physics, nuclear physics, special relativity. READ A FORMULA PROPERLY Each article opens with its main formula and 382 useful rearrangements in total, then a table of symbols with SI units, the conditions under which the formula holds, the physical meaning in three short paragraphs, and the mistakes that cost marks most often — 505 of them collected across the book. SOLVE, NOT JUST LOOK UP 161 articles include a calculator. Pick the value you are looking for, type in what you know in the units shown, and the app solves the formula for that unknown. Angles are entered in degrees. LEARN FROM WORKED EXAMPLES All 168 articles contain a complete worked example: the given values, the reasoning step by step, and the answer with its unit. BUILD YOUR OWN CHEAT SHEET The cheat sheet screen lists formulas without the explanations, filtered by topic or by your starred articles — a fast way to revise before a test. FIND IT FAST Search by the name of a law, a formula, a quantity or a symbol. Filter by topic, by favourites, or show only articles that have a calculator. THE TABLES YOU KEEP NEEDING 51 physical constants with values and units, 38 SI units with 11 prefixes, and a short guide to solving problems. TWENTY LANGUAGES English, Spanish, French, German, Italian, Portuguese (Brazil), Dutch, Swedish, Danish, Norwegian Bokmål, Turkish, Vietnamese, Japanese, Korean, Chinese (Simplified and Traditional), Arabic, Hindi, Thai and Russian — including the notation: subscripts are written the way your language writes them. Arabic reads right to left while formulas keep their standard direction. COMFORTABLE TO USE Light and dark themes, phones and tablets, portrait and landscape. Physics Pro AI tutor: step-by-step physics explanations on your device Problem scanner: camera or photo, review the text before asking AI tutoring requires iOS 26 and Apple Intelligence. The scanner and handbook work without AI. All formulas and calculators remain free. Monthly · Yearly · Lifetime. Subscriptions renew automatically. Cancel in the App Store. Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/