iHanFei vs PhysicsBench

Two thousand years on, Han Feizi still cuts clean. iHanFei is an offline Legalist workshop built around a single classical work, not a static text dump: close reading, recitation, practice, collections, and a daily habit. No account, no ads, no tracking. 55 chapters, 5,376 sentences aligned across original, vernacular, and study English, plus 225 famous lines, 85 fables, and 47 concepts of fa, shu, and shi. Browse by 20 parts, 7 genres, themes, figures, and representative chapters, each with a short guide. 1. The complete work, fully offline • All 55 chapters in traditional order, 5,376 sentences aligned three ways • 225 famous lines, 85 fables, and 47 concepts of law, technique, and positional power • Guides for part, genre, theme, figure, famous line, fable, concept, and representative chapter • Everything ships inside the app, even with a weak signal 2. Three-layer close reading • Original, vernacular, and English on one page, each gloss on its own switch • Side by side, Chinese only, or English only, apart from the interface language • Simplified and Traditional glyphs, optional pinyin, vertical text, and sectioned long chapters • Immersive reading, a two-column iPad layout, and shareable study cards • Vernacular and English are study translations for this app, for learning only 3. The recitation workbench • Line-by-line highlighting, with speed, pitch, volume, and voice under your control • A Playback Content matrix sets title, author, and body in original, vernacular, or English • Continuous play, background audio, Now Playing, and an optional Live Activity • Start from last read, the daily passage, or a list 4. Legalist Study and Hunt the Law • Fade recall, fill in the blank, sense check, and a multiple-choice quiz • Drill one section or a batch from favorites and lists; fade and quiz update mastery • Fable match pairs a story with its sense • Hunt the Law: given one character, find every line that holds it 5. The fable hall and the concept graph • Story first, then back to the source sentence, with marks for the idioms most often taught • The fa, shu, and shi graph ties terms into a net • Fables and concepts can be saved and placed on the Home Screen 6. A passage each day • One selected chapter from a rotating pool, with optional solar-term and festival context • A local reminder, a check-in streak, and shortcuts to fables, recitation, or Study • Open a random chapter, or return to the last place you stopped 7. Favorites, lists, notes, and search • Separate favorites for chapters, fables, and famous lines, plus your own lists • Notes, history, continue reading, and a mastered list • Fast full-text search, plus handwriting search when you cannot type pinyin • List, grid, and card layouts; optional iCloud sync across your own devices 8. Widgets, Siri, and system features • Six Home Screen widgets for the daily passage, lines, fables, concepts, favorites, and mastery • Lock Screen accessories, StandBy, nine Control Center buttons, and ten Siri shortcuts • Home Screen quick actions and deep links; Spotlight stays off until you turn it on • For iPhone, iPad, Mac, and Apple Vision 9. On-device explanation • On supported iPhone models and system versions, an on-device model can explain a paragraph or draft a quiz • Text stays on the device; the feature is off by default 10. Make it yours • Light, dark, or follow the system, with accent colors and alternate app icons • Interface in Simplified Chinese, Traditional Chinese, and English • Tabs you can hide, a seven-page tour, three guides, and study cards in many styles 11. Who it is for • Readers who want the whole work, not a quote list • Students, teachers, and readers of political thought, including English readers • Anyone building a daily habit, with no account, no ads, and no analytics • The original is public domain. Vernacular and study English were made for this app, for learning only

Solve real physics, not fake wiring puzzles. PhysicsBench simulates actual circuits, light paths and torque — then shows you the formula behind your solution. Wire a battery, close a switch, watch current flow and a bulb light up. Bounce a beam off mirrors into the target. Balance a lever with the right weights. Every level ends with a Principle Card: the law, the formula, and your level's real numbers substituted in. MAIN FEATURES • 108 levels across seven subjects: Circuits, Optics, Mechanics, Dynamics, Electromagnetism, Heat & Fluids, Waves & Sound • Three difficulties per subject: Intro, Core, Brainer • True simulation — nodal analysis for DC circuits with diodes and capacitors, ray tracing for light, torque balance, and closed-form models for motion, induction, heat and sound • Principle Card after every solve, with your own values • Daily experiment with streaks • Courses by topic, a review queue for levels you needed hints on, and a mastery radar • Unlimited hints, never a consumable • Import and play levels friends share as a code or .physlab file • AR experiment bench: pendulum, ramp, projectile, collision and buoyancy run in 3D with the engine's real numbers; rotate, zoom, tune them and place them on your desk in AR • Home-screen widget, Apple Pencil notes and bench recording • Works fully offline. No ads, no accounts, no tracking PRO — ONE-TIME PURCHASE • All 108 levels, including every Brainer level • Full step-by-step derivation on every Principle Card • Frame-by-frame replay with velocity and force arrows, and a draggable RC charging curve • Free Bench lab: sliders for every model, plus building, naming and saving experiments • Level editor that proves your puzzle is solvable before you share it • Full probe panel: per-branch voltage, current and power; every beam path; torque breakdown • Four extra themes and three alternate app icons • Future local Pro levels in this app ANSWER REPORTS — OPTIONAL Pro includes every answer and all Pro features. One-time purchase. No subscription. Three sample answers per category are free to view again. Unlock Pro for all remaining answers. Existing answer-pack purchases can still be restored for their original difficulty. PRIVACY Everything runs on your device. Progress syncs through your own private iCloud. No account, no analytics SDK, no data sent to us. NOTE Levels use teaching-simplified models (ideal wires, batteries with internal resistance, single-colour rays). The in-app "About the model" page lists every assumption. Support · Privacy Policy · Terms of Use are in Settings.