# FoCal Mobile — Test and tune your DSLR focus.

> DSLR camera autofocus calibration and analysis tool for mobile devices. (iPhone/iPad app by Reikan Technology Ltd.)

- Source: https://appshunter.io/ios/app/focal-mobile/id1644899552 (this page in markdown: same URL + `.md`)
- Developer: [Reikan Technology Ltd](https://appshunter.io/developer/1644899554)
- Category: Photo & Video
- Price: Free with in-app purchases
- Rating: 3.80/5 from 17 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 87 MB
- Released: 2022-10-23
- Data updated: 2026-07-24
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/focal-mobile/id1644899552/reviews.md

## What is FoCal Mobile?

FoCal Mobile brings Reikan FoCal's DSLR camera calibration and analysis tools to your mobile device!

Connect your camera to your device* and FoCal takes control to analyse the performance of your autofocus system and tune it for better shots.


The free FoCal Mobile app features:

- Automatic control of all Canon and Nikon DSLRs and Mirrorless cameras which support AF tuning (AF Microadjustment/AF Fine Tune)
- Automatic verification of test setup, including camera position, lighting, camera and lens settings and more
- One-tap testing of autofocus system performance, with scores and crops to review
- Camera time synchronisation


With a FoCal Pro subscription or FoCal Pro (Desktop) license (within support), you can add:

- Calibration of your lenses, tuning your autofocus for the best performance possible. Get the very best from your camera and lenses.
- Check your autofocus with cameras that have already been calibrated.
- FoCal Comparison Database: compare the performance of your kit with 1,000s of other users to find out how it compares to *real-world* use, NOT artificial lab tests!
- Review historical data, recall tests and calibrations you've run to find out how your equipment is holding up.
- Export data to FoCal Pro Desktop for more detailed analysis, charting, reports and more.
- One-tap Time Sync - synchronise your camera time with one tap right from the first screen of FoCal.
- Calibrate and analyse lenses with focal lengths over 400mm.



* Connection is via USB or the Reikan Wireless Camera Control Module.
- For iPhone and iPad with lightning connectors, you will require a Lightning to USB Adapter in order to connect a camera - further details are provided in the app help, but a standard Lightning to USB adapter will work in most cases.
- For iPad with USB-C, you can directly connect to the camera with just an appropriate cable.

FoCal requires the use of a FoCal Target, which you can download and print using links from within the app, or purchase from the FoCal store.

You will need a FoCal account, which can be created for free from within the app. With a FoCal Pro (Desktop) license which is within the support period, you will have automatic access to all Mobile Pro features.



FoCal can control the following cameras (a complete list and help with each camera is available at: https://reikanfocal.com/supported-cameras.html)

Canon:
- EOS-1D Mark III
- EOS-1Ds Mark III
- EOS-1D Mark IV
- EOS-1D X
- EOS-1D X Mark II
- EOS-1D X Mark III
- EOS 5D Mark II
- EOS 5D Mark III
- EOS 5D Mark IV
- EOS 5DS
- EOS 5DSr
- EOS 6D
- EOS 6D Mark II
- EOS 7D
- EOS 7D Mark II
- EOS 50D
- EOS 70D
- EOS 80D
- EOS 90D

Nikon:
- D3
- D3S
- D3X
- D4
- D4S
- D5
- D6
- D300
- D300S
- D500
- D600
- D610
- D700
- D750
- D780
- D800
- D800E
- D810
- D810A
- D850
- Df
- D7000
- D7100
- D7200
- D7500
- Z30
- Z50
- Z50ii
- Zfc
- Z5
- Z5ii
- Z6
- Z6ii
- Z6iii
- Z7
- Z7ii
- Z8
- Z9
- Zf

End User License Agreement available at: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- Automatic DSLR autofocus analysis
- Camera and lens calibration
- Test setup verification
- One-tap autofocus testing
- Comparison database
- Historical data review
- Camera time synchronization

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| FoCal Mobile Pro | $19.99 | per year |


## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/focal-mobile/id1644899552/reviews.md

### 1/5 — Was great, now WORTHLESS

*2025-12-05*

FoCal has been a trusty piece of software for years, and as of late it seems the developers have just given up on it. Support doesn’t reply, the mobile app says my login is incorrect but the same login works on the website. I have a valid license until 2026. Don’t bother, they’ve obviously taken everyone’s money and ran.

### 1/5 — INCOMPETENT

*2025-06-24, version 1.12.0*

The ‘sign up for free’ button does not work. If you are that incompetent there is NO WAY I am using your software. Deleted.

### 2/5 — Not ready and has serious connection problems. Stick with the PC Version.

*2024-08-06*

Numerous attempts to maintain connections with my Nikon the program continually failed to maintain Wi-Fi connection and also crashes during certain times and is unable to take images as required it became such a chore that I gave up and went back to the PC version this mobile version is not ready and it has a lot of issues with connection Wi-Fi stability is terrible

### 1/5 — Won’t connect to camera

*2024-08-04*

Tried every. This app won’t connect to iPhone 14 Pro or d850.

### 1/5 — Philip Tidman

*2024-02-14, version 1.6.0*

Customer support is not replying , I brought the pc version the down load didn’t work, contacted support they asked for more details then nothing , I managed to download an old version then update the old version , also down loaded the mobile version on my iPad used the license I paid for , set the camera up came to adjust the settings I have to pay again for the mobile pro version, not very happy so far ,

### 3/5 — Several important features missing

*2023-02-10*

I have been focus, calibrating my cameras with Reikan’s software on my desktop for the last 12 years. I find several important features missing from this iOS/mobile port, particularly the ability to set what f-stop and ISO are used during focus calibration. I hope they bring these settings to the mobile version soon, as not every photographer wants to calibrate their lenses at the widest aperture when Chromatic aberration and other lens errors are at their highest. Also, while doing the focus calibration test, there is no readout of quality of focus, or the graphical representation of where the test points align. This version is packaged as a “quick fix” tool instead of the full-fledged data-collecting package that real PROs need to make informed decisions about their optics.

### 1/5 — Doesn’t work on my camera. Disappointed.

*2022-11-27, version 1.0.1*

Only works on Canon or Nikon cameras

## Frequently asked questions about FoCal Mobile

### What cameras does FoCal Mobile support?

FoCal Mobile supports a wide range of Canon and Nikon DSLRs and mirrorless cameras that allow AF tuning. A comprehensive list of supported cameras is available on the Reikan FoCal website.

### How do I connect my camera to FoCal Mobile?

Connection is typically made via USB. For iPhones with Lightning connectors, a Lightning to USB adapter is required. iPads with USB-C can connect directly with an appropriate cable.

### Is FoCal Mobile free to use?

The core FoCal Mobile app is free and includes features like automatic AF tuning and test setup verification. Advanced features such as lens calibration and comparison data require a FoCal Pro subscription.

### What is the cost of FoCal Pro?

FoCal Mobile Pro is available as a subscription for $19.99 per year. This subscription unlocks advanced features for enhanced camera and lens tuning.

### Does FoCal Mobile require a special target?

Yes, FoCal Mobile requires the use of a FoCal Target. You can download and print one from within the app or purchase one from the FoCal store.

### How often is FoCal Mobile updated?

The latest version of FoCal Mobile is 2.0.2, last updated on January 30, 2026. Updates typically include support for new cameras, bug fixes, and feature enhancements.

### Can I compare my camera's performance with others?

Yes, the FoCal Comparison Database allows you to compare your kit's performance with thousands of other users. This feature is available with a FoCal Pro subscription.

### What is the age rating for FoCal Mobile?

FoCal Mobile has an age rating of 4+. This indicates that the content is generally suitable for all ages, with no mature themes.

## Version history (last 5 releases)

### 2.1.1 — 2026-05-04

Brings improvements to image analysis for more stable and accurate results, operational improvements in AF System Check tool, and various fixes and improvements to results (both live and historical).

### 2.0.2 — 2026-01-30

Fixed an issue accessing external help and account creation

### 2.0.0 — 2026-01-25

FoCal Mobile 2.0: The Major Milestone



Welcome to the next generation of mobile calibration! Version 2.0 brings the power of our Desktop 5.0 engine to your pocket.



Faster & Smarter: A brand-new core framework delivers lightning-fast analysis and surgical precision for your AF results.



Solid Connection: Overhauled communication protocols for rock-solid USB and Wi-Fi camera control.



Polished UI: A refreshed, smoother interface with improved graphics and PDF report generation.

### 1.12.0 — 2025-06-06

It's been a while since the last release, so there's a lot of internal updates in this one!

Not least, it brings support for the Nikon Z50ii and Z5ii cameras, as well as stability, performance and control updates.

There's also an important update to improve reliability and accuracy on all Nikon Z-series cameras.

### 1.9.2 — 2024-08-10

This version brings support for the new Nikon Z6iii camera, as well as some internal bug fixes to improve reliability.

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## More apps by Reikan Technology Ltd

- [Reikan FoCal Snapshots](https://appshunter.io/ios/app/reikan-focal-snapshots/id6446488527)

All apps by Reikan Technology Ltd: https://appshunter.io/developer/1644899554

## Related topics

[focal](https://appshunter.io/ios/topics/focal)

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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 2026-07-24.*