做 IT 二十多年，最忠实的伙伴不是任何一台服务器，而是颈椎。
坐在电脑前太久，脖子会发出抗议。不是那种剧痛，而是一种持续的僵硬和酸胀——低头看手机时加重，抬头时咔咔作响。偶尔还会落枕，早上醒来脖子转不了，得僵着脑袋过大半天。
“多活动"三个字说起来简单。真正执行起来，大多数时候是这样的：忙着忙着忘了，想起来的时候已经过了两三个小时。偶尔跟着网上的教程做几下，动作对不对也不确定。没有反馈，没有节奏，做完了也不知道做得怎么样。
有段时间在研究 AirPods Pro 的空间音频功能，翻文档时注意到苹果开放了一个头部运动追踪的 API——CMHeadphoneMotionManager。AirPods 里有陀螺仪和加速度计，能实时获取头部的旋转角度。
我突然想到一件事：它是不是也能知道我的头往左转了多少度？往前低了多少？
试了一下，数据很稳定。前屈、后仰、左右转头、侧屈——每个方向的角度变化都能清晰捕捉。
这就够了。
我需要的不是一个复杂的健康管理平台，而是一个很简单的东西：定时提醒我活动脖子，带着我做一组标准动作，戴着 AirPods 时还能告诉我动作做到位了没有。做完打个卡，今天的任务就算完成。
于是开始写。
语音带练是核心。不需要盯着屏幕看——上班时间打开 App，戴上耳机，闭上眼睛跟着语音提示做就行。“慢慢向左转头……保持……回到中间。“这样的节奏。AirPods 在后台安静地追踪，如果转头角度不够，会轻声提醒。
不戴 AirPods 也完全能用。语音带练本身就是完整的体验，AirPods 只是一个增强——有了更好，没有也不影响。
写着写着，发现自己成了最忠实的测试用户。上午十点一组，下午三四点再来一组，每次三分钟，不长，但做完之后确实松快不少。连续做了两周之后，看着打卡记录，有一种朴素的满足感——落枕的次数，好像也少了。
这大概就是这个 App 最准确的定位：不是治疗工具，不是专业康复设备，而是一个帮你养成"起来活动一下"习惯的轻量助手。
如果你也是久坐办公的人，低头族，如果你也在某个上午或下午忽然觉得脖子僵硬——试试看。三分钟，一组动作，可能比你想象的有用。
Twenty-plus years in IT, and the most loyal companion isn’t any server — it’s my cervical spine.
Sit in front of a computer long enough, and your neck protests. Not sharp pain, but a persistent stiffness and ache — worse when you look down at your phone, accompanied by audible clicks when you look up. Every now and then I’d wake up with a stiff neck, unable to turn my head properly for half the day.
“Move more” is easy to say. In practice, it usually goes like this: you get busy and forget, then realize two or three hours have slipped by. Occasionally you follow an online tutorial for a few reps, unsure if you’re even doing it right. No feedback, no rhythm, no sense of whether it helped.
I was digging into the spatial audio capabilities of AirPods Pro at some point, and while reading the documentation, I noticed Apple exposes a head motion tracking API — CMHeadphoneMotionManager. AirPods have a gyroscope and accelerometer that can read head rotation angles in real time.
A thought struck me: could it also tell how far I’ve turned my head to the left? How far I’ve tilted forward?
I tested it. The data was solid. Flexion, extension, left-right rotation, side bending — angular changes in every direction came through clearly.
That was enough.
I didn’t need a complex health management platform. I needed something simple: remind me to move my neck on schedule, guide me through a set of standard movements, and when I’m wearing AirPods, tell me whether I’ve reached the proper range of motion. Finish, check in, done for the day.
So I started building.
Voice guidance is the core. No need to stare at the screen — just open the app at your desk, put in your earbuds, close your eyes, and follow the voice prompts. “Slowly turn your head to the left… hold… return to center.” That kind of rhythm. AirPods quietly track in the background; if your rotation angle falls short, a gentle nudge.
It works perfectly fine without AirPods too. Voice guidance alone is the complete experience — AirPods are just an enhancement. Better with them, fine without.
As development progressed, I became my own most dedicated tester. One session at ten in the morning, another around three or four in the afternoon. Three minutes each, not long, but noticeably looser afterward. After two straight weeks, looking at my check-in history, there was a simple kind of satisfaction — and the stiff-neck mornings seemed to happen less often.
That’s probably the most accurate description of this app: not a medical tool, not professional rehab equipment, but a lightweight assistant that helps you build the habit of “getting up and moving a bit.”
If you spend your days sitting at a desk, head always tilted down, if some morning or afternoon you suddenly feel that familiar stiffness — give it a try. Three minutes, one session. It might help more than you’d expect.