# LiveMM — 35mm Focal Length Viewfinder

> 35mm Focal Length Viewfinder (iPhone/iPad app by haedong kim.)

- Source: https://appshunter.io/ios/app/livemm/id6760615615 (this page in markdown: same URL + `.md`)
- Developer: [haedong kim](https://appshunter.io/developer/1879521905)
- Category: Photo & Video
- Price: Free
- Age rating: 4+
- Requires: iOS 16.0 · 17 MB
- Languages: American English
- Released: 2026-03-19
- Data updated: 2026-05-15
- User reviews in markdown: https://appshunter.io/ios/app/livemm/id6760615615/reviews.md

## What is LiveMM?

---                                                                                                         
  Know your focal length. Every shot.
                                                                                                              
  LiveMM displays your real-time 35mm equivalent focal length and angle of view
  directly on the viewfinder — so you always know exactly what you're shooting.

  Whether you're a film photographer trying to match a composition on your phone,
  or someone who wants to develop a sharper eye for perspective, LiveMM speaks
  the language of real cameras.

  ---

  REAL-TIME FOCAL LENGTH OVERLAY
  As you zoom in or out, LiveMM instantly shows the 35mm equivalent focal length
  (e.g. 26mm) and angle of view (e.g. 77°) on screen. No lag. No guessing.

  HARDWARE-ACCURATE READINGS
  LiveMM reads the field of view directly from your iPhone's physical camera
  hardware using AVFoundation. The focal length you see is calculated from the
  actual optics of your device — not a rough estimate.

  LENS PRESET BUTTONS
  Instantly switch between your phone's physical lenses — 0.5×, 1×, 2×, and 3×
  — with a single tap. LiveMM automatically detects which lenses your device has
  at startup, so it works correctly on any iPhone without a device database.

  PINCH TO ZOOM
  Use standard pinch-to-zoom gestures for continuous zoom between lens presets.
  The overlay updates in real time throughout the entire zoom range, including
  digital zoom.

  PHOTO CAPTURE WITH EXIF DATA
  Capture photos directly in the app. The 35mm equivalent focal length is written
  into the photo's EXIF metadata, so your camera roll tells the full story of
  every shot.

  ---

  PERFECT FOR
  · Film and mirrorless camera photographers shooting with an iPhone
  · Photography students learning to see in focal lengths
  · Anyone who wants to understand what their phone's lenses actually see

  REQUIREMENTS
  · iPhone 12 or later
  · iOS 16.0 or later
  · Physical device required (camera features are not available in Simulator)

  ---


## Version history (last 2 releases)

### 1.0.1 — 2026-03-22

Bug Fixes                                                                                                   
  - Fixed intermittent crash on app launch (AppDelegate force unwrap)
  - Fixed crash when switching between background/foreground (camera session race condition)                  
  - Fixed loading screen freeze on iPad (camera engine premature deallocation)              
  - Fixed inaccurate 35mm focal length on multi-lens devices (iPhone 12 Pro, etc.)                            
  - Fixed excessive digital zoom range on single-lens devices (iPad mini, etc.)

### 1.0 — 2026-03-19

No release notes.

## More apps by haedong kim

- [Cat Road](https://appshunter.io/ios/app/cat-road/id6759817728)
- [Korean Royal Roots](https://appshunter.io/ios/app/korean-royal-roots/id6762009309)
- [Cat Spike](https://appshunter.io/ios/app/cat-spike/id6762034234)

All apps by haedong kim: https://appshunter.io/developer/1879521905

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-15.*