常见问题

Early Signal 即将登陆 iPhone。在本站加入等候名单，上架 App Store 时我们会发邮件。商店链接上线后才会出现——我们不会放占位下载按钮。

我们需要足够有效的 HRV 和静息心率夜晚，才能把你和自己比较。首次打开时也会读取已在 Apple 健康中的夜晚，许多人立刻就能建立基线。在此之前不会发送 明显偏离平常 提醒。

若夜间 HRV 或静息心率未同步，我们不会编造有把握的状态。应用会指出缺什么以及如何修复——通常是夜间手表佩戴与 Apple Health 权限。

iOS 17+ 的 iPhone，以及能记录夜间 HRV 的 Apple Watch。腕温需要 Series 8 或更新 — 没有则圆环省略 Temp，并有脚注说明原因。呼吸频率从 Series 3 起可用。请授予健康访问：腕温、呼吸频率、HRV、静息心率、睡眠和体能训练。

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.

提醒偏保守。明显偏离平常 需要信号间加权一致——或相对你本人基线的持续夜间温度升高。最多每 3 天一次 明显偏离平常 提醒。高强度训练、旅行、饮酒或有意睡眠不足，可能把一般的 略有变化 或 明显偏离平常 显示为 可由情境解释（应用内状态，无推送）。温度主导的结果不会被拦住。略有变化 推送属于 Pro。可在设置中暂停提醒。

不会。应用从不这样声称。应用内状态是 正常、略有变化 或 明显偏离平常——或训练／已记录情境后的 可由情境解释。压力、训练、睡眠、旅行、饮酒或身体不适都可能改变指标。状态只表示你的模式对你来说看起来不寻常。

Off from usual means several overnight signals moved together versus your own baseline, or wrist temperature rose and stayed up versus you. The app suggests low-risk rest actions, such as skipping hard training. It does not diagnose or treat disease and is not medical advice. Pushes are capped at one every 3 days.

After a hard workout, travel, alcohol, or a short night you chose, a generic Slightly off or Off from usual pattern can show as Explained by context. You still see the status in the app. There is no push. Temperature-led results are not held back by that context.

打开健康应用 → 共享 → App → Early Signal，并关闭访问。若新样本停止到达，应用会显示指引。

在应用中：设置 → 删除全部应用数据。这会移除本地指标、评估、签到、分析与已安排的通知。

仍可继续。应用会停在健康步骤并给出说明：打开健康 → 共享 → App → Early Signal，并允许读取类型。没有权限前，今日无法建立个人基线。

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.

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.

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.

晨间预警始终免费。Early Signal Pro 可选，增加个人准确率报告、提醒灵敏度、更深趋势与历史、略有变化 推送、中号小组件和 CSV 导出。方案：$3.99／月、$24.99／年或 $49.99 终身。Pro 不会在 明显偏离平常 早晨自动出现 — 仅在平静的 正常 日或设置中。

可以。评分与存储在设备端完成。使用应用不需要互联网。

可以。从主屏幕图库添加今日小组件，以及锁屏圆形和矩形。它们显示最新状态（正常、略有变化、明显偏离平常 或 今日无判定），点按打开应用。带建议的中号小组件是 Pro。小组件不读取 HealthKit——使用每次评估后的快照。

The morning status, Off from usual alerts, 14-day trends, 30-day history, and small widgets stay free. Pro unlocks a personal accuracy report, custom alert sensitivity, Slightly off pushes, deeper history, a medium widget, and CSV export. Plans are $3.99 per month, $24.99 per year, or $49.99 lifetime.