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Early Signal

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Early Signal你知道那种醒来就不对劲的早晨迹象其实已经在了

来自手表上已有夜间数据的私人提醒——只与你比较。

仅发送上线邮件，可随时退订。见我们的 隐私政策.

工作原理

上线时发邮件。预警始终免费。

9:41

今日

略有变化

相对平常模式有小幅变化

  • 跳过高强度训练

    在信号回稳前保持轻松活动

  • 比平时多补充水分

    水或电解质饮料——少量多次

  • 早点睡

    今晚尽量更早入睡

腕温

领先

呼吸频率

领先

HRV

辅助

静息心率

辅助

睡眠

背景

  • iPhone，iOS 17+
  • 可记录夜间 HRV 的 Apple Watch
  • 腕温需 Series 8+
  • 夜间佩戴

Medical disclaimer

GetEarlySignal is a wellness tracking and rest-day support tool. It does not provide medical diagnoses, treatment plans, clinical assessments, or healthcare advice. The app does not replace professional medical care or emergency healthcare services.

What is Early Signal?

Early Signal is a consumer wellness tool for iPhone and Apple Watch. It measures personal variations in overnight biometric baselines—wrist temperature, breathing rate, heart rate variability (HRV), resting heart rate (RHR), and sleep—to suggest low-risk rest actions. It does not diagnose or treat disease and is not medical advice.

适合谁

为已经有 Watch 的人

不用再买配件，没有要盯着的仪表盘，也不用账号

你已经在戴 Watch

不用新的戒指或绑带 — Early Signal 使用已在 Apple Health 里的夜间数据

你不想再要一个仪表盘

一次少见的提醒，不是每天早上盯着的图表

你希望它保持私密

默认在 iPhone 上，无需账号

五个信号

温度与呼吸领先

先看压力区分信号，心脏指标作支持，睡眠作背景。若手表从未记录腕温，圆环会省略 Temp。缺失数据绝不会看起来“在范围内”。

领先

腕温

Series 8+ 夜间相对你的升高

领先

呼吸频率

Series 3+ 呼吸变化

辅助

HRV

夜间变异性下降

辅助

静息心率

个人静息心率上升

背景

睡眠

恢复性的夜间背景

How wearable data is read

GetEarlySignal reads overnight biometric samples that Apple Watch has written to Apple Health. The inputs are sleeping wrist temperature, respiratory rate, heart rate variability (HRV), resting heart rate (RHR), and sleep (asleep time, used as context). Scoring looks for personal deviations from your own baseline, such as a drop in HRV together with a rise in overnight respiratory rate or wrist temperature. Those deviations are wellness markers used to suggest a rest day. They are not a disease detection, a clinical assessment, or a prediction that you will feel unwell. Blood oxygen (SpO2) is not an input.

工作原理

三步，无需新硬件

为佩戴 Apple Watch 的成年人而建——无需再买一枚戒指，也无需弄懂 HRV 是什么，就能获得早期提醒。

  1. 01

    学习你的常态

    你授权后，我们会读取已在 Apple Health 中的夜间数据。有效天数足够后，我们只与你本人比较——从不与人群平均比较。

  2. 02

    留意承压迹象

    Early Signal 会看腕温、呼吸、HRV、静息心率和睡眠是否一致。温度和呼吸优先。若手表从未记录腕温，圆环会省略 Temp。缺失数据绝不会看起来“在范围内”。

  3. 03

    最多每 3 天一次

    明显偏离平常 提醒刻意很少。你会得到清楚说明、低风险休息建议和可选打卡。可随时在设置中暂停。

From a status to a rest action

When GetEarlySignal shows Slightly off or Off from usual, Today turns that status into a short list of recovery steps: skip hard training, drink more fluids than usual, and get to bed earlier. You can log context such as a hard workout, travel, alcohol, or a short night you chose. The result stays a wellness suggestion on your iPhone.

更多详情见工作原理与科学依据页面 工作原理 · 科学依据

应用里

一个可以行动的晨间状态

今日、趋势和一个小组件 — 不是又一个生物指标仪表盘

9:41

趋势

  • 腕温

  • 呼吸

  • HRV

领先信号在前，只与你比较

趋势
9:41

今日

明显偏离平常

多项信号同时出现变化

  • 跳过高强度训练

    给身体一个恢复日。

  • 比平时多补充水分

    水或电解质饮料——少量多次

明显偏离平常
9:41

主屏幕

Early Signal

略有变化

一眼看到状态

主屏幕
为什么是这个

不是又一个看数字的地方

夜间数据已经在 Apple。Early Signal 把它变成一个状态 — 是补充，不是替代。

活动圆环

合上当天的圆环

Early Signal 对照你自己，观察夜间负荷

Apple Health

昨晚的数字和图表

一个晨间状态，以及一次可以行动的少见提醒

查看工作原理

另一枚戒指或绑带

新硬件和会员

Early Signal 使用你已经在戴的 Watch

隐私

天生注重隐私

生物指标属于个人。应用设计为无需云账号也能运行。

默认设备端

原始健康数据留在 iPhone 上 — 无需账号

只读 Apple Health

我们读取腕温、呼吸频率、HRV、静息心率、睡眠与体能训练。我们不写入 Apple Health，也不共享样本。

无广告，不售卖数据

我们不出售健康数据、不用于广告，也不用其训练通用模型。

On-device computing. Biometric logs are stored on your iPhone with iOS data protection. We maintain strict data silos. Your personal health metrics, biometric logs, and tracking data stay on your device and are not used to train external AI or language models.

你将获得

清晰的晨间状态、少见提醒和小部件。预警保持免费 — Pro 增加深度，且绝不会在 明显偏离平常 的早晨弹出

  • 晨间状态：正常、略有变化 或 明显偏离平常
  • 腕温和呼吸作为领先信号 — 若手表从未记录则省略 Temp
  • 信号同步变化时的通俗说明
  • 趋势图优先显示腕温和呼吸，然后是 HRV、静息心率和睡眠
  • 主屏幕与锁定屏幕小组件，一眼查看状态
  • 可选签到、提醒暂停，以及设置中删除全部数据

需要能记录夜间 HRV 的 Apple Watch。腕温需 Series 8 或更新；呼吸频率从 Series 3 起。可离线使用。预警免费——Pro 可选。

通知我
常见问题

常见问题

提醒、学习模式、小组件，以及状态意味着什么——和不意味着什么。

Can an Apple Watch detect early signals of sickness?

An Apple Watch can record overnight changes in wrist temperature, respiratory rate, heart rate variability (HRV), resting heart rate (RHR), and sleep. GetEarlySignal reads those samples from Apple Health and compares them with your own baseline. Slightly off or Off from usual means the pattern looks unusual for you. It is not a sickness detector, a diagnosis, or a prediction that you will feel unwell. If you feel sick or have severe symptoms, contact a clinician or emergency services.

How does GetEarlySignal map my heart rate variability (HRV)?

GetEarlySignal reads overnight HRV from Apple Health, typically stored as SDNN. It builds a personal baseline with a median and a median absolute deviation from your own nights. HRV is a supporting signal. Wrist temperature and respiratory rate lead when the Watch has recorded them. An HRV drop alone does not set Off from usual, and it is not a diagnosis.

Is my wearable health data secure in the GetEarlySignal app?

Health data stays on your iPhone. Scoring and storage are on-device, protected with iOS data protection. Apple Health access is read-only. There is no cloud account and no upload of biometric logs. Personal health metrics are not sold, not used for ads, and not used to train external AI or language models. You can delete all app data in Settings.

Is Early Signal a medical device?

No. Early Signal is a wellness tool. It does not diagnose or treat disease, and it is not medical advice. Status levels describe personal deviations in overnight biometric baselines and suggest low-risk rest actions.

查看全部常见问题

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通知我

Early Signal 是一款健康管理应用，不是医疗器械。它不诊断、预测、预防或治疗疾病，也从不点名具体病症。如有令人担忧或严重的症状，请就医。 隐私条款科学依据.

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