Quartet

Compare focal lengths, live

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

14mm — Wide. Landscape drama, cinematic space. 35mm — Street. The classic reportage frame, natural and honest. 50mm — Standard. The human-eye view, no distortion. 85mm — Portrait. Compressed space and beautiful subject separation. HOW IT WORKS - A clean 2:3 viewfinder with Leica-style frame lines, so you compose deliberately. - Every shot is a real capture from a real lens — never a digital crop faked from one photo. - A focal length key is printed on every export: 14 WIDE · 35 STREET · 50 STANDARD · 85 PORTRAIT. SHARE OR STUDY - Story — a 9:16 contact sheet for Stories. - Feed — a clean 2:3 grid. - Save the composed frame to your photo library for reference or class material. Quartet works best on iPhone models with multiple rear cameras (iPhone 12 and later recommended) for true optical framing across all four focal lengths. Made by 2B Studio.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

Export originals — long-press Save or tap the arrow to export the four captures as separate photos with full EXIF (focal length, aperture, shutter, ISO, timestamp) at native 4:3 resolution. Focal length descriptions during capture, enabled in Settings. Refined interface, small polish and stability improvements throughout. Made by 2B Studio.

Version 1.1

The developer, KUAN HUANG, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • KUAN HUANG
    Size
    • 592.9 KB
    Category
    • Reference
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • © 2026 2B Studio
  • Privacy Policy

    • More by KUAN HUANG