Going Train

No. Going Train reads your phone's own clock to compare it against the tower clock — it never sets, corrects, or displays the time as a general-purpose clock, alarm or widget.

At the first blow of the hour bell, tap the button on Today. Going Train compares that instant with the phone's own time and logs how many seconds fast or slow the tower clock is. If you enter the distance from where you stand to the bell, it corrects for the time sound takes to travel (roughly 3 milliseconds per metre).

It converts your weekly readings into a rate in seconds per day, and studies your own record of rating-nut changes on that particular clock to work out what a single turn does on it. It only ever uses your own before/after readings — Going Train never assumes a universal figure for how much a turn changes a clock's rate, because that depends on the pendulum, bob and thread of your specific movement.

Going Train reads the spring/autumn transition dates straight from your phone's own time-zone rules — nothing is hard-coded — and offers a Clock Change screen with the usual tower methods (stopping the pendulum for an hour or advancing eleven in autumn; advancing an hour while letting the strike finish, or disconnecting it first, in spring) shortly beforehand. If your time zone has no seasonal change, this screen simply doesn't appear.

No. Going Train works fully offline and has no account or sign-in of any kind. All your records stay on your device.

Going Train ships with two sample clocks and a few weeks of realistic readings so every screen has something to show the first time you open it. Open Settings and choose "Remove the example clocks" to clear them and start your own record.

Only so you can attach a picture of the movement, a bell, or a repair to your maintenance and fault log in the Clock Book. No other photos are read, and pictures never leave your device.