Mobile apps for Android, Apple and BlackBerry devices. We have the following apps available: CROR Canadian railway signals and a UAV/drone aerial photography altitude calculator. Rob Chandler's
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App availability may vary by platform.
Available at the Apple App Store. Available at BlackBerry World. Available at Android Apps on Google Play.

We will endeavour to have current versions of our apps available on each
vendor's site. Due to vendor security requirements, Apple & BlackBerry
apps generally have a 7-10 day delay before being made available on
their download sites.