点读机 vs PhysicsBench

点读机是一款英语听读练习与知识点学习辅助工具，通过同步点读课程，帮助学习者听清、读懂每一句。 【找点读课程】 按版本系列、年级查找点读课程，支持搜索和单元目录。每套点读课程的第一单元可免费体验。 【点一点，听一句】 点选课程页面中的文字或句子列表，即可播放对应发音。支持连续朗读、语速调节、中文翻译和知识点讲解，方便预习、复习与听读训练。 【适配 iPhone 和 iPad】 默认全屏点读，点选翻译或讲解切换为图文模式，点击图片返回全屏。为手机和平板分别适配布局，支持页面缩放、单元和页码跳转、水墨模式，以及浅色和深色外观。 【我的书包】 收藏常用点读课程，在本机保存学习进度和设置，下次继续学习。 【一次购买，恢复使用】 通过 App Store 一次性非消耗类内购解锁全部点读课程，无订阅，无需注册或登录点读机账号。以前已购买的用户可在设置中点击“恢复购买”，使用购买时的 Apple 账户恢复权益。 本应用提供点读、朗读与知识点学习辅助功能。首次加载课程资源需要联网。已加载的文本、图片和音频会缓存到本机，减少重复等待；付费缓存仍需有效的 Apple 购买权益。缓存可在设置中清除，书包和学习进度保存在本机。 使用帮助：https://dianduji.org/iOS 隐私说明：https://dianduji.org/privacy

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.