# f/ Tools: Photo Calculator — Best photography calculator > Photography preproduction tool with calculators for depth of field, resolution, and exposure. (iPhone/iPad app by David Quiles.) - Source: https://appshunter.io/ios/app/f-tools-photo-calculator/id668237473 (this page in markdown: same URL + `.md`) - Developer: [David Quiles](https://appshunter.io/developer/578971109) - Category: Photo & Video, Utilities - Price: $3.99 - Rating: 3.70/5 from 6 App Store ratings · 15 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 5 MB - Languages: American English, French (France), German (Germany), Italian, Japanese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan) - Released: 2013-07-08 - Data updated: 2026-10-16 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/f-tools-photo-calculator/id668237473/reviews.md ## What is f/ Tools? f/Tools is a toolkit for digital and film photography. Explore depth of field, compare defocus across lenses, and try different shutter speeds before you shoot. Plan your prints and calculate flash exposure, with interactive diagrams that make photographic concepts easier to understand. Features: • Depth of field and hyperfocal distance See near and far focus limits and how they change with aperture, focal length, and focus distance. • Defocus comparison Explore how focal length, aperture, and subject distance affect blur, with a magnifier for a closer look. • Freeze motion Calculate the shutter speed needed to limit motion blur based on subject speed, distance, and focal length. • Motion blur Try different shutter speeds and visualize the resulting motion trail. • Diffraction and resolution Explore Airy disc size and estimated effective resolution as you change the aperture. • Framing and prints Calculate scene dimensions, adjust cropping, and find the circle of confusion and minimum resolution needed for your print size and viewing distance. • Flash exposure Calculate exposure at different distances using guide number, flash power, aperture, and ISO. • Your cameras and lenses Save your equipment and set lens limits for aperture, focal length, and focus distance. Get started quickly with built-in camera presets. Built-in help explains the controls, calculations, and photographic terms within each tool. ## Key features - Graphic depth of field calculator - Graphic Airy disc calculator - Graphic format calculator - Motion freeze calculator - Graphic blur size calculator - Graphic flash exposure calculator - Camera bag with lens limits ## Is f/ Tools safe? Not enough ratings yet to assess f/ Tools. ## Is f/ Tools legit? f/ Tools: Photo Calculator appears to be a legitimate app. The AppsHunter Legitimacy Score for f/ Tools is 90 out of 100 points across 7 verification signals from App Store and developer data. ## Recent user reviews (10 of 15) All indexed reviews: https://appshunter.io/ios/app/f-tools-photo-calculator/id668237473/reviews.md ### 5/5 — Very useful app *2026-09-16* Easy to use and full of useful tools and options for the ambitional photograph who does not want to make only automatic snapshots with his camera. ### 5/5 — Like *2026-06-15* Simple, straightforward, and super useful. ### 5/5 — Very useful app *2026-06-07* Easy to use and full of useful tools and options for the ambitional photograph who does not want to make only automatic snapshots with his camera. ### 5/5 — Superb photographic calculator *2026-01-13* Most photographers know that a wide open aperture is one of the things (along with focal length and camera-to-subject distance) that reduces depth-of-field. And that this can be used for creative effect. This handy calculator lets you explore the effects with different lenses and cameras. But did you know that diffraction effects at small f/stops significantly reduce the effective resolution of your high megapixel sensor? This is brilliant app from David Quiles really helps hone and fine-tune your understanding of the way your lens(es) and film or digital sensor(s) turn light into images. Bravo David. PS: I wish the lenses and cameras could be resorted in the lists. I don’t necessarily want a new entry to appear at the bottom of the list! ### 5/5 — Awesome Tool ! *2023-02-15* No more charts, calculation, conversion or guessing. All the photo planning tools are now at my fingertip, instantly. Marvelous ! ### 5/5 — A helpful tool and competent support *2022-01-12* A comprehensive and very useful tool for all photographers. The developer's technical support is fast and qualified. ### 5/5 — Few years later and still love it! *2021-05-21* Well made and very useful. ### 1/5 — Crashing all the time - waist of time and $1 *2020-10-11* Crashing on most of tools and pages. ### 5/5 — Semplicemente stupenda! *2019-09-20, version 2.2* Era davvero una cifra di tempo che cercavo un’app semplice e pratica da usare per quando scatto in analogico o comunque in manuale. Bhè questa è straordinaria! Pratica, semplice e completa. Con un layout minimale ed intuitivo ti permette di giocare con la terna focale/distanza/apertura mostrandoti al volo pdc, iperfocale ebokeh, ma anche molto altro... Ed è anche disegnata in modo molto carino, vintage ed intrigante! ### 5/5 — Great App *2019-07-24* I’m relatively new to photography so this app has been a life saver and a learning tool. I highly recommend it to anyone trying to take the best picture they can. ## Frequently asked questions about f/ Tools ### What is f/ Tools? f/ Tools is a photography preproduction tool that provides a set of calculators for various photographic concepts. It aims to help users visually understand complex ideas related to sharpness, depth of field, and exposure. ### What kind of calculators are included in f/ Tools? f/ Tools includes graphic calculators for depth of field, Airy disc, scene/print format, motion freeze, blur size, and flash exposure. It also features a camera bag tool with lens limits. ### Is f/ Tools suitable for beginners? Yes, f/ Tools is designed to help users visually understand complex photographic concepts. It includes built-in help and a glossary to assist users of all levels. ### What devices does f/ Tools support? f/ Tools is available for iPhone and iPod devices. It is compatible with iOS devices. ### How much does f/ Tools cost? f/ Tools is a paid application priced at $4.99. There are no in-app purchases or subscriptions required after the initial purchase. ### When was f/ Tools last updated? The latest version of f/ Tools, 2.3.1, was last updated on March 27, 2026. This indicates a recent focus on maintaining and improving the application. ### What is the user rating for f/ Tools? f/ Tools has a user rating of 3.8 stars based on 5 ratings. This suggests a generally positive reception from its user base. ### Does f/ Tools have ads? No, f/ Tools does not contain advertisements. As a paid application, it offers an ad-free experience for its users. ## Version history (last 5 releases) ### 3.0 — 2026-10-16 NEW • Motion Blur tool: explore how shutter speed affects motion trails. • Dark Mode. IMPROVED • Redesigned Defocus tool to compare subjects at different distances. • Redesigned Flash tool with clearer exposure information at different distances. • Clearer depth-of-field display. • Improvements to the Freeze Motion tool. • Automatic scaling for distance diagrams, without needing to pinch to zoom. • Interface adapted for iPhone Duo and iPad. • Interface refinements for easier use. • Clearer in-app help. FIXED • Cropped film formats now work correctly in print mode without changing the print size. • Editable values can now be edited with a single tap. • Layout issues on some screen sizes. ### 2.7.7 — 2026-10-03 • Added automatic distance scaling. • Depth of field with estimated blur and diffraction warnings. • Airy disc calculator now supports film. • Improved readability and settings layout. ### 2.7.6 — 2026-09-26 Bug fixes ### 2.7.5 — 2026-09-25 Improvements to the flash exposure calculator. ### 2.7.4 — 2026-09-19 Compatibility improvements with older iOS versions Interface improvements Bug fixes ## Apps similar to f/ Tools | App | Rating | Price | Category | | --- | --- | --- | --- | | [Reciprocity Timer](https://appshunter.io/ios/app/reciprocity-timer/id459691262) | 2.5 (4) | $1.99 | Photo & Video | | [Flash Photography Adviser](https://appshunter.io/ios/app/flash-photography-adviser/id1354932744) | 5.0 (2) | $0.99 | Photo & Video | | [Frames: Film Photography Log](https://appshunter.io/ios/app/frames-film-photography-log/id6744057317) | 5.0 (6) | Free | Photo & Video | | [Light Meter by WBPhoto](https://appshunter.io/ios/app/light-meter-by-wbphoto/id1524189195) | 4.4 (42) | $6.99 | Photo & Video | | [Film Logbook - Analog Tracker](https://appshunter.io/ios/app/film-logbook-analog-tracker/id1520402017) | 4.0 (10) | Free | Photo & Video | | [Analog Film Developer Timer](https://appshunter.io/ios/app/analog-film-developer-timer/id768356095) | — | $14.00 | Photo & Video | ## More apps by David Quiles - [myLightMeter PRO](https://appshunter.io/ios/app/mylightmeter-pro/id583922375) - [Light Meter Wheel](https://appshunter.io/ios/app/light-meter-wheel/id720707253) - [Triptography](https://appshunter.io/ios/app/triptography/id806272440) - [mySpotMeter](https://appshunter.io/ios/app/myspotmeter/id6789911475) All apps by David Quiles: https://appshunter.io/developer/578971109 ## Related topics [photographer tools calculation](https://appshunter.io/ios/topics/photographer-tools-calculation) --- *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 2026-10-16.*