Best Focal Length Calculator Apps

248+ iOS apps curated and reviewed

3.7 avg rating
14 free apps
Updated October 2026

Every iPhone needs a few good focal length calculator apps. We benchmark 248+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Compare top Focal Length Calculator Apps (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Digital DoFDigital DoFFree4.6★ (274)YesYesOct 2026
2LensAgent ProLensAgent ProFree3.8★ (18)NoYesOct 2026
3Focal Length CalculatorFocal Length Calculator$2.99—NoNoOct 2026
4light&depth: Sun, DoF and FoVlight&depth: Sun, DoF and FoVFree4.7★ (238)NoYesOct 2026
5Set Math: Film CalculatorSet Math: Film CalculatorFree—NoNoOct 2026
6Magic Canonic ViewFinderMagic Canonic ViewFinderFree4.6★ (50)YesYesOct 2026
7DoF: Depth of Field CalculatorDoF: Depth of Field CalculatorFree3.9★ (18)NoNoNov 2026
8D0F Calculator for APS-C FujiD0F Calculator for APS-C FujiFree—NoNoMay 2026

Top Picks for Focal Length Calculator

Digital DoF#1

Digital DoF by Indie Film Gear LLC

Depth of Field & Focus Planner
Editor's Choice
📷 Photo & Video
4.6😊(274 ratings)
FreeAdsIn-App Purchases
Digital DoF screenshot 1
Digital DoF screenshot 2
Digital DoF screenshot 3
Digital DoF screenshot 4

Calculate depth of field with this customizable tool designed for cinematographers and photographers. Choose from a wide range of cameras and save your custom settings for quick access. Explore in-app purchases for enhanced functionality.

What We Love

  • 🚀 Instant depth of field information
  • 👍 Comprehensive camera selection
  • 🔍 Helpful for planning photography
  • 💡 Great teaching tool for photography lessons

Room to Improve

  • 🐛 Crashes on launch for some users
  • 🐛 Compatibility issues with certain devices and iOS versions
  • 📢 Intrusive ads in some versions
  • 🔍 Inaccurate hyperfocal distance calculations for some cameras/lenses
LensAgent Pro#2

LensAgent Pro by N.rise

Digital Director's Finder
Strong Contender
📷 Photo & Video
3.8(18 ratings)
FreeIn-App Purchases
LensAgent Pro screenshot 1
LensAgent Pro screenshot 2
LensAgent Pro screenshot 3
LensAgent Pro screenshot 4
LensAgent Pro screenshot 5
LensAgent Pro screenshot 6

This app assists with lens selection for photography and videography by simulating camera views and calculating focal lengths. It offers live and captured image modes, distance-based calculations, and customizable lens lists. Unlock extensive presets and custom format creation with an annual subscription.

More Focal Length Calculator apps to explore

FAQ about Focal Length Calculator

What are the best focal length calculator apps for iPhone?
Digital DoF tops our focal length calculator apps ranking as of October 2026, with a 4.6-star average from 274 App Store ratings, and it's free to download.
Yes — 14 of the top focal length calculator apps we rank are free to download, including Digital DoF and LensAgent Pro.
Digital DoF shows ads and offers in-app purchases, according to its App Store listing as of October 2026.
We track 248+ focal length calculator apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.