FoCal Mobile

In-app purchases
2.7
43 reviews
1K+
Downloads
Content rating
Everyone
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About this app

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 an Apple Lightning to USB3 Adapter in order to connect a camera.
- 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 can be printed using links from within the app, or purchased 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
- Zfc
- Z5
- Z6
- Z6ii
- Z6iii
- Z7
- Z7ii
- Z8
- Z9
- Zf
Updated on
Jan 9, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info, App info and performance, and Device or other IDs
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

2.7
39 reviews
Martyn Sheard
August 5, 2025
Can't recommend this. I really wanted it to work. I tried the mobile app both with USB and WiFi connection to my D850. Neither method worked properly. I was able to connect and run the check routine OK most of the time but when I came to check calibration, there were errors about missing parameters, the mobile phone screen would go blank and the camera locked up. I had to force close the app and remove the camera battery to reset it. Would have tried PC app but no trial version available.
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Richard Perriman
April 18, 2025
I found it very confusing to get started, constantly having to connect and disconnect the usb cable to adjust camera settings. (There appeared to be a link to adjust the settings, but it didn't work). I had to go online to print the target. Ok, so I got results,I but to actually calibrate the lens, you have to get Pro at £19 ... a year. Why is it a subscription? If it was a one-time purchase, fine, but I hesitate to go for yet another subscription
1 person found this review helpful
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Richard Jefferies
December 6, 2022
It detects and correctly identifies the camera attached (Canon EOS 6D mk2). I then tap the "connect" button and it goes into "updating information" and that's it. It will happily do that for hours but never gets beyond that. Pity as, on paper, it looks like a useful utility. EDIT - impressively prompt support response to this review with link to customer support. A good sign.
1 person found this review helpful
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Reikan Technology Ltd
December 6, 2022
Thanks for the review, and sorry you've not been able to connect. We'd like to understand why as that's obviously not what should happen! Could you raise a support ticket at https://blog.reikanfocal.com/contact-support/ and we'll get some further information from you.

What’s new

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.

App support

About the developer
REIKAN TECHNOLOGY LIMITED
support@reikan.co.uk
67 Merriefield Avenue BROADSTONE BH18 8DB United Kingdom
+44 1202 770517