Chronos Lens

Stamp time, place, weather & temperature on photos and videos—live while shooting or from your library. Fully on-device. Customize watermark templates in seconds.

Chronos Lens is a privacy-first watermark camera for iPhone.

Capture photos and videos with live overlays—time, weekday, place, weather, and temperature—or add watermarks to existing photos and videos from your library using their original metadata.

FEATURES • Live watermarks while shooting photos and videos • Add watermarks to existing library media • Reads capture time and GPS from EXIF / video metadata • Weather and temperature via Apple WeatherKit • Customizable templates: fields, position, color, size, opacity, and background style • Built-in templates plus create your own • Chinese and English UI that follows system language • All processing stays on your device—no account required

HOW IT WORKS

1. Allow Camera, Microphone (for video), Location, and Photos access when prompted
2. Choose a template on the Templates tab
3. Shoot from Camera, or import media from Album Watermark
4. Save watermarked results to your Photos library

PRIVACY Location, weather, photos, and videos are used only on-device to generate watermarks. We do not upload your media or location to our servers. Weather data is provided by Apple Weather and is subject to Apple’s terms.

Weather may be unavailable without network/location access, or for older media outside WeatherKit’s historical range. In those cases, weather fields are hidden and other watermark fields still work.

Shiyu Camera requires iOS 17 or later.