Something not working, or an idea for the app? Email support@help4uu.com and describe what you saw — your iPhone model and iOS version help a lot.
Almost always the compass, not the astronomy. Your phone's magnetometer can be pulled 10–30° off course by steel in walls, desks, speakers, magnetic cases and MagSafe accessories. Two fixes, in order:
A cyan dot on the gear icon means a manual offset is currently applied. Open Calibration and tap Reset to clear it.
Which stars are above you depends entirely on where you are standing — the sky over Beijing at 9pm is not the sky over Berlin. Your coordinates are used only for on-device calculation and never leave the phone. If you decline, the app still runs from a default location, but the labels will be wrong for you.
Yes, completely. Positions are computed on-device and the object descriptions are bundled into the app. Airplane mode is fine.
Yes. The overlay does not care whether the sky is bright — you can find where the Moon and planets are in broad daylight, and daytime is actually the easiest time to calibrate against the Sun. Never look directly at the Sun through the camera or with your eyes.
SkyLens Star ships with the Sun, Moon, five planets, about 45 of the brightest stars and 8 constellation figures — the objects you can name and point at. It is not a million-star catalog.
The app follows your iOS system language. Change it in Settings → General → Language & Region, then reopen SkyLens Star.
遇到问题，或者有功能建议？请邮件联系 support@help4uu.com，描述一下你看到的情况 —— 附上 iPhone 型号和 iOS 版本会很有帮助。
基本都是指南针的问题，不是天文计算的问题。墙体钢筋、桌子、音箱、磁吸手机壳和 MagSafe 配件都会把手机磁力计带偏 10–30°。按顺序试两步：
齿轮图标上出现青色小点，表示当前有手动偏移生效。进入校准界面点「重置」即可清除。
你头顶有哪些星星完全取决于你站在哪里 —— 晚上 9 点北京的天空和柏林的天空完全不同。坐标仅用于本机计算，不会离开你的手机。如果拒绝授权，App 仍能运行（使用默认位置），但标注对你所在地不准确。
完全可以。星体位置在本机计算，天体介绍也已打包进 App。飞行模式下正常使用。
能。叠加层不受天色影响 —— 大白天也能找到月亮和行星的位置，而且白天其实是对着太阳做校准最方便的时候。请勿用相机对着太阳长时间取景，更不要用肉眼直视太阳。
SkyLens Star 收录的是太阳、月亮、五大行星、约 45 颗最亮的恒星和 8 组星座连线 —— 也就是你叫得出名字、指得出位置的那些。它不是一个百万级星表。
App 跟随 iOS 系统语言。在设置 → 通用 → 语言与地区中切换后，重新打开 SkyLens Star 即可。