NFPA 101 · BS 5266
Start the discharge and walk the building. Elapsed time is worked out from the moment you pressed go, so locking the phone, closing the app or restarting it loses nothing. At the end you know which fittings did not hold their rated duration, and when each one was found dark.
Why the timer survives interruptions
The instant you pressed start is written to disk. Nothing accumulates and nothing ticks, so there is no counter to lose when Android kills the process behind you.
Screen off, app swiped away, phone restarted: reopen it and the test is still running, at the right elapsed time. What it cannot survive is a phone you no longer have, because nothing is synced anywhere.
An hourly prompt while the test runs and one when the target elapses, so a ninety minute discharge does not depend on you remembering to look.
What it writes down
You are walking a building, so you mark a fitting when you find it dark. That is the first time it was observed dark, which is not the same as the moment it failed. The record says so, and the report prints it that way.
You mark the fitting when you find it out. The app records that instant and labels it as what it is: the first time it was seen dark.
The schedule prints the dropout as ≤ 00:47:18 with a footnote explaining it, because all that is known is the fitting was lit at your last look and dark at this one.
A three hour fitting and a one hour fitting are not judged against the same number. Held time is compared with the rated duration recorded on that fitting.
What is in it
Start the discharge, walk the building, mark fittings as you find them out. Hourly prompts, and a prompt at the target.
Each fitting carries its own first-observed-dark time, kept and compared across annual tests rather than collapsed into one verdict.
One register per site: maintained, non-maintained, sustained, exit sign and central battery fittings, with floor, zone, lamp and battery type.
Stick a label on the fitting’s housing, not the diffuser, and scan it to open that fitting’s history.
The full luminaire schedule, held time, lux readings, per-fitting result, and a defects table for the quote.
An optional prompt 24 hours after a discharge, because a cell can hold its duration and then never take a charge again. It is a reminder, not a verdict.
The real screens
Chosen per site
The standard is recorded on a test when it starts, so switching a site later never alters a record that is already finished. US jurisdictions adopt different editions of NFPA 101, so the app names the edition it works to.
Deliberately absent
A fitting going dark could be the charger, the lamp, the driver, the connection, the control gear or the central supply. The default record is “did not hold duration”, which is what you saw. Naming the battery would be a diagnosis the app cannot make.
Lux values are typed in from your own calibrated meter and the report names the instrument. A phone sensor is uncalibrated, varies by an order of magnitude between handsets, and cannot defend a figure to an inspector.
A fitting fed from a central battery has no cell of its own, so the health figure is suppressed and never stored for it.
Technician name, company and accreditation number print exactly as you enter them. LumiCheck verifies none of them.
Price
Questions
Yes. Elapsed time is worked out from the stored start instant, so locking the screen, closing the app or restarting the phone does not affect the result. Reopen it and the test is still going.
No, and it does not claim to. You mark a fitting when you find it dark on the walk round, so the app records the first time it was observed dark. The report prints that as an upper bound on how long the fitting held.
Fittings that were still lit are recorded as untested rather than as failures, and their stored status is left alone. The test itself is kept and printed as incomplete.
NFPA 101 or BS 5266, chosen per site, so a mixed portfolio is handled correctly. The standard is recorded on a test when it starts, so a later change to the site never alters a finished record.
No. Your site records stay on the device, with no account and no cloud sync. The app does send crash and usage diagnostics, and the standard tier shows ads.
No. FireBook is the fire logbook kept by whoever is responsible for one building. LumiCheck is the test log used by the contractor who tests emergency lighting across other people’s buildings.