Best Focal Length Calculator Apps

218+ iOS apps curated and reviewed

4.6 avg rating
16 free apps
Updated May 2026

Every iPhone needs a few good focal length calculator apps. We benchmark 218+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Top Picks for Focal Length Calculator

Magic Canonic ViewFinder#1

Magic Canonic ViewFinder by Roman Medvid

Director's ViewFinder
Editor's Choice
📷 Photo & Video
4.6(49 ratings)
FreeAdsIn-App Purchases
Magic Canonic ViewFinder screenshot 1
Magic Canonic ViewFinder screenshot 2
Magic Canonic ViewFinder screenshot 3
Magic Canonic ViewFinder screenshot 4
Magic Canonic ViewFinder screenshot 5
Magic Canonic ViewFinder screenshot 6

This application helps professionals in filmmaking preview precise framing for their shots using a digital director's viewfinder, simulating the field of view of various cameras and lenses. With the app, users can select their camera and lens, apply color presets, and capture images or videos for reference, making it easier to plan and prepare for shoots.

light&depth: Sun, DoF and FoV#2

light&depth: Sun, DoF and FoV by Lukas Schmidt

Field Toolkit for Photography
Strong Contender
📷 Photo & Video
4.7(204 ratings)
FreeIn-App Purchases
light&depth: Sun, DoF and FoV screenshot 1
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light&depth: Sun, DoF and FoV screenshot 3
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This app is a powerful tool for organizing tasks, managing projects, and collaborating with teams. Stay productive with features like task lists, due dates, file sharing, and real-time chat. Take control of your work and enhance productivity - download now!

DoF: Depth of Field Calculator#3

DoF: Depth of Field Calculator by 志勇 杨

Focus Assistant Tool
Worth Considering
📷 Photo & Video
3.2(5 ratings)
$1.99
DoF: Depth of Field Calculator screenshot 1
DoF: Depth of Field Calculator screenshot 2
DoF: Depth of Field Calculator screenshot 3

This photography tool helps you calculate the depth of field and focus distance based on your camera settings, such as frame, aperture, and lens focal length. Try it out to easily determine the near and far limits of your depth of field and take control of your photography focus.

More Focal Length Calculator apps to explore

4
Digital DoF
Digital DoF
Digital DoF
A Depth of Field Calculator
Free

Simplify depth of field calculations with this customizable tool for photographers and cinematographers. Choose your camera settings, save preferences, and unlock additional features within the app. Sign up now to enhance your photography experience.

📷 Photo & Video
(270)
5
Focal Length Calculator
Focal Length Calculator
Focal Length Calculator
Focal Length Multiplier
$2.99
📷 Photo & Video
(0)
6
FinderKit: Viewfinder
FinderKit: Viewfinder
FinderKit: Viewfinder
For filmmaking and photography
Free

"Discover FinderKit: Viewfinder, the ultimate app for filmmakers. Select your camera and lens to preview what your camera will capture, organize projects, create shotlists, and access a range of features like overlays, gallery organization, PDF export, and more. Start optimizing your filming process today!"

📷 Photo & Video
(46)
7
Depth Of Field Calculator
Depth Of Field Calculator
Depth Of Field Calculator
by Essence Computing
$0.99

This application helps photographers calculate the depth of field for a given camera setting, allowing them to understand the relationship between settings and focus. By inputting distance to the subject, focal length, and f-stop, users can easily determine the near and far distances of acceptable focus and visualize the results in a simple diagram.

📷 Photo & Video
(44)
8
LensAgent Pro
LensAgent Pro
LensAgent Pro
Digital Director's Finder
Free

This application helps users determine the ideal lens focal length for photography, offering three modes: Live View, Capture View, and Distance Conversion. With various features like image saving, location tracking, and customizable lens lists, it supports lens selection, location scouting, and meetings, and offers in-app purchases for additional camera formats.

📷 Photo & Video
(17)
9
Calculator₊
Calculator₊
Calculator₊
Basic, Scientific, Plus Calc
Free

Try Calculator₊, the ultimate mathematics tool offering basic, scientific, and plus calculations. Ideal for homework, exams, and managing expenses, this app is like having a personal math tutor on your phone. Download now for easy and intuitive math solutions!

🔧 Utilities
(1.7M)
10
Calculator #
Calculator #
Calculator #
Scientific Calculator
Free

Calculate complex mathematical equations effortlessly with this intuitive app. Simplify your calculations on the go with advanced features like graph plotting and equation solving. Download now to supercharge your math skills!

🔧 Utilities
(36K)
11
Calculator‰
Calculator‰
Calculator‰
Default Calculator
Free

Experience a beautifully designed calculator with large buttons and a clear display for quick and efficient calculations. Try it now to discover the simplicity and ease of use for your everyday arithmetic needs.

🔧 Utilities
(404K)
12
Calculator·
Calculator·
Calculator·
Big Basic Calculator
Free

A simple and intuitive calculator app with essential functions like addition, subtraction, multiplication, and more. Customize with multiple color schemes, copy results easily, and use additional functions on iPad. Experience the perfect balance of features and simplicity today!

🔧 Utilities
(33K)
13
Background Remover - PNG Maker
Background Remover - PNG Maker
Background Remover - PNG Maker
Photo background changer
Free

Remove backgrounds from your photos effortlessly with an advanced AI-powered tool. Create transparent images in seconds for professional product photos, thumbnails, and more. Unleash your creativity with easy-to-use editing tools for a seamless background removal experience.

🎨 Graphics & Design
(10K)
14
Calculator for iPad!
Calculator for iPad!
Calculator for iPad!
Basic & Scientific Calculator
Free

Quickly crunch numbers with our user-friendly iPad calculator app that offers basic and scientific functions. Download now for accurate calculations on the go!

🔧 Utilities
(60K)
15
Calculator with History +
Calculator with History +
Calculator with History +
No ads & Scientific calculator
Free

A calculator app with a built-in history feature that keeps track of your calculations without any ads. Calculate effortlessly and access your past computations instantly.

💰 Finance
(23K)
16
Calculator Pro Lite
Calculator Pro Lite
Calculator Pro Lite
Best Calculator
Free

A versatile and customizable calculator app offering basic and scientific functions, memory features, history tape, and various layout options. Users can personalize their color themes, access scientific functions, and easily perform complex calculations, all with ad-supported convenience. Explore the app now for a powerful and user-friendly calculation experience!

🔧 Utilities
(3K)
17
Color Calculator-smart&cute
Color Calculator-smart&cute
Color Calculator-smart&cute
Cute calculator app with theme
Free

A color calculator app that helps users find complementary color schemes for design projects. Simply input a base color and let the app generate harmonious color combinations for your projects. Try it now to elevate your design choices!

🔧 Utilities
(15K)
18
Calculator!
Calculator!
Calculator!
by 7th Gear
$0.99

Calculator! is a versatile calculator app for iPad and iPhone with standard and scientific functions. Customize the look, take notes, view history, and perform complex calculations with ease. Perfect for math students and professionals.

🔧 Utilities
(4.2K)
19
SetMyCamera
SetMyCamera
SetMyCamera
Photography Calculator
Free

Enhance your photography skills with SetMyCamera, the ultimate app for all your photography needs. From depth of field to light metering, SetMyCamera equips you with tools to capture stunning images effortlessly. Take control of your camera settings and explore a world of possibilities in photography. Visit SetMyCamera.com for more features and information.

📷 Photo & Video
(138)
20
Calculator with History Tape
Calculator with History Tape
Calculator with History Tape
No Ads Calculator with Memory
Free

Access a user-friendly calculator app with a built-in archive of your calculations for easy reference. Enjoy an ad-free experience with customizable features for seamless calculations. Try it now for straightforward and efficient math operations.

📊 Productivity
(3.2K)