优私教 vs LapLync

优私教 —— 你的全领域私人成长教练，随时随地解锁新技能 孩子/成人练竞技体育需要专业指导？想学音乐乐器总找不到专业老师？想练出好身材却没人带？想找专业老师培养孩子思维能力却没有门路？优私教 APP，打破领域界限，把运动健身、竞技体育、音乐乐器、美术绘画、益智运动的专业 “私教” 全装进口袋，让每一种热爱都能科学进阶！ 【多种学习方式，灵活多变，匹配自由，学习随心】 告别每天接送孩子的奔波，告别每天去教练所在地上课的劳累，节省宝贵时间，在熟悉舒适的环境中高效学习，这就是家教的魅力。优私教提供“学员指定地点、私教指定地点、双方协商地点”三种模式。让专业私教服务如约而至。 【专业背景严格把关，让你安心上课，其余交给优私教帮您办妥】 每位老师/教练均实现实名制认证，并经过严格人工审查资质背景信息（学历、运动员证、指导员证、留学证、教学经验等），需持有国家/国际认可的职业资格认证证书，杜绝无证、假证、无经验教学，杜绝仅是“爱好”就能当教练的市场环境，把钱花得值！ 【平台担保交易，资金安全零风险】 我们建立了完善的平台担保体系，一课一结制，每节课上完都让你亲自确认核销，从根源上杜绝“卷款跑路、付款就无法退课、退课高额手续费”等风险，让你学习更省心、更安心、更放心。 【隐私安全，安心学习】 您的联系方式将受到严格保护。无需向任何第三方机构或私教透露，可通过群聊方式一对一联系老师，从根源上隔绝电话骚扰与信息泄露的风险。在这里，您可以纯粹地专注于成长与提升，享受无打扰、无忧的学习体验。 【5 大领域全覆盖，专业指导一站搞定】 1、竞技体育 学篮球、学足球、学羽毛球、学游泳、学网球、学体操、学滑雪、学皮划艇、学滑冰等专项训练，退役运动员、退役教练员、国际/国家运动健将、一二级运动员 & 专业教练带你拆解技术动作，从基础运球到战术配合，帮你突破瓶颈、提升竞技水平，不仅仅是教练，也是您的专业陪练。 2、音乐乐器 学钢琴、学吉他、学小提琴、学古筝等热门乐器教学，从识谱、指法到乐曲演奏，分阶课程 + 教案个性化成长方案，零基础也能循序渐进练出成就感。众多硕士、博士、留学海归、院校教授讲师等高资历老师，专业师资团队让你无论是决战艺考，还是兴趣学习、陪学陪练，都能“从从容容、游刃有余”。 3、运动健身 增肌 / 减脂 / 塑形 / 康复专属计划 / 瑜伽 / 普拉提，来优私教，找到你的专属自由教练。平台严选认证教练，为你量身定制科学计划，并通过在线实时指导，精准矫正动作发力。让你充分利用碎片时间，在家即可享受一对一“健身房级”私教体验，安全高效，每一步都练在点子上。 4、美术书法 素描、水彩、油画、插画、硬笔、软笔入门到进阶，美院老师手把手教构图、调色、笔触，从线条练习到完整创作，轻松解锁绘画技能。从企业家签名教学到书法艺考学习，无论是希望提升个人艺术修养、为孩子培养特长，还是需要打造令人过目不忘的商务签名，优私教的专业师资团队都能为你量身定制学习方案。 5、益智运动 围棋、象棋、魔方、少儿编程逻辑思维训练，专业棋手 / 教练拆解技巧与思路，从规则入门到策略进阶，锻炼脑力的同时收获乐趣。

One stopwatch, shared by every device in the room. Whether you're timing sprint drills on the sideline, running a swim meet, coordinating several stations along a course, or keeping a presentation or exam on one clock, LapLync starts every device together — side by side or in another country — and keeps them in sync even when the connection drops. FOR COACHES AND TRAINERS Hand athletes their phones, share a 6-character room code (or let them scan your QR), and tap Start. The 3-2-1 countdown appears on every screen at the same time. Anyone in the room can record a lap, and laps and splits show up on every device — no extra hardware, no manual data entry. FOR COMPETITION TIMEKEEPERS AND OFFICIALS Assign a device to each judge station or timing post and create a room. Every device stays in sync whether they share the venue Wi-Fi or each use their own mobile data. Clocks are aligned to Apple's time servers (NTP); devices typically agree to within a few tens of milliseconds — about ±50 ms, depending on the network. KEEPS RUNNING WHEN THE CONNECTION DROPS LapLync switches connections automatically so timing keeps going: • Bluetooth + Wi-Fi: used first when devices are close together • Internet: used automatically when devices are on different networks — even in different cities or countries • Independent mode: if all connectivity fails, each device keeps running from its NTP anchor — recordings merge automatically when the connection restores A brief "Reconnecting…" banner appears while the stopwatch keeps running. LapLync reconnects over the internet on its own, or you can tap Reconnect to retry right away. NO ACCOUNT REQUIRED Create a room and share the 6-character code by voice, chat, or QR scan. Participants join in seconds. No sign-up, no password, no email address. When the session ends, the room disappears. UNDO OR DELETE A LAP Recorded the wrong lap? Tap Undo right after it's logged (can be turned off in Settings), or long-press any lap — or swipe in the full lap list — to delete it. The host can delete any lap; participants can delete their own. Deletions sync to every device. HANDS-FREE LAP RECORDING Record laps without touching the screen: the volume buttons, a Bluetooth shutter remote, or a keyboard/page-turner remote. Optional and off by default — turn it on in Settings. LIVE ACTIVITY Watch the running stopwatch right on your Lock Screen and in the Dynamic Island. Optional — turn it off anytime in Settings. WHAT'S INCLUDED Free • Rooms with 2 devices — you and one more • Join any room as a participant, as often as you like • Synchronized start, lap recording, and split times • Full connectivity: local Bluetooth/Wi-Fi, internet relay, and automatic fallback • Your 3 most recent sessions, saved locally LapLync Pro — a one-time in-app purchase • Rooms with up to 8 devices • CSV export — share via AirDrop, Mail, or any app • Unlimited session history, saved locally Only the person who creates the room needs Pro. Joining is always included — hand a phone to anyone and they can take part. No subscription, no ads, no account. PRIVACY FIRST LapLync uses only your device UUID and device name — to identify and label your device within a room. They are kept in temporary session state while the room is active and deleted when the session ends. No location data, no contacts, no tracking, no account. Requires iOS 17 or later.