FoCal Mobile 4+

Test and tune your DSLR focus‪.‬

Reikan Technology Ltd

    • 4.3 • 9 Ratings
    • Free
    • Offers In-App Purchases



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:

- 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 5DSr
- EOS 6D
- EOS 6D Mark II
- EOS 7D
- EOS 7D Mark II
- EOS 50D
- EOS 70D
- EOS 80D
- EOS 90D

- 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
- Z7
- Z6ii
- Z7ii
- Z8
- Z9

End User License Agreement available at:

What’s New

Version 1.6.0

Efficiency and performance improvements, camera control updates and minor UI bug fixes.

Ratings and Reviews

4.3 out of 5
9 Ratings

9 Ratings

krisraephoto ,

Several important features missing

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.

App Privacy

The developer, Reikan Technology Ltd, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Identifiers
  • Usage Data
  • Other Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Some in‑app purchases, including subscriptions, may be shareable with your family group when Family Sharing is enabled.

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