FlickerSpec: LED Flicker Test
iPhone / Utilitaires
Your new LEDs shouldn't be giving you headaches. If they are, the lights are almost certainly flickering — faster than your eyes can consciously detect, but fast enough to trigger migraines, eye strain, and fatigue. FlickerSpec turns your iPhone into a flicker meter, using the 240fps camera to measure exactly what your eyes can't.
For compliance documentation — clinical engineering, facility management, EU Ecodesign certification — FlickerSpec generates PDF reports with IEEE 1789 and IEC PstLM verdicts that satisfy accreditation surveyors and lighting auditors.
WHAT YOU MEASURE
Quick Measurement (Free, unlimited)
Live 240fps capture with real-time results:
• Dominant flicker frequency in Hz
• Percent Flicker and Flicker Index per IEEE 1789-2015
• Signal-to-noise ratio and confidence rating
• Live luminance waveform and FFT spectrum
• No daily limit — measure as many fixtures as you like
Compliance Verdicts (Pro)
Turn raw numbers into a documented decision:
• IEEE 1789-2015 PASS/FAIL verdict against the published low-risk practice
• Custom pass/fail thresholds when your specification differs
• The standard and threshold applied are recorded with every saved measurement
IEC Certified Measurement (Pro)
3-minute tripod capture for compliance documentation:
• Short-Term Flicker Severity (PstLM) per IEC TR 61547-1:2015
• EU Ecodesign 2019/2020 PASS/FAIL (threshold: PstLM ≤ 1.0)
• 8× oversampled LM flickermeter validated against all 5 IEC Table A.1 test vectors
• Suitable for clinical engineering and lighting audit documentation
Measurement Logging & PDF Reports (Pro)
Every audit, documented:
• Save measurements with GPS location, fixture photo, and notes
• Single-measurement and session-summary PDF reports
• PstLM + EU Ecodesign section included when applicable
• Calibration certificate reference on every report
• CSV export for spreadsheet workflows
Calibration System (Free)
Verify accuracy before any audit:
• Built-in calibration web app generates a known-frequency reference signal
• Point your iPhone at any screen showing the calibration page
• Timestamped calibration certificate attached to all subsequent reports
MEASUREMENT BANDWIDTH
240fps camera capture (Nyquist: 120 Hz) measures mains-driven LED flicker reliably:
• 60 Hz flicker (half-wave LED drivers, US) — full accuracy
• 120 Hz flicker (full-wave rectified, US) — frequency reliable; use the 3-min IEC flow for stable depth measurements
• Above 120 Hz PWM and kHz drivers — outside camera bandwidth
NO SUBSCRIPTIONS
$49.99 one-time purchase unlocks everything: IEEE 1789 verdicts, IEC Certified Measurement, unlimited logging, PDF reports, CSV export, calibration certificates, report header customization with your company name and logo.
Free tier: unlimited Quick Measurements with the full live readout — frequency, percent flicker, flicker index, SNR and confidence — plus free calibration.
Privacy Policy: https://flickerspec.slick-engineering.workers.dev/privacy
Terms of Use: https://flickerspec.slick-engineering.workers.dev/terms
Quoi de neuf dans la dernière version ?
Privacy and accuracy fixes:
• GPS coordinates in reports, exports and on screen are now rounded to roughly 11 m. Six-decimal coordinates resolved to a specific address, and CSV exports published the raw value.
• Percent signs now print correctly throughout PDF reports.
• Measurement uncertainty is shown at a sensible precision instead of rounding down to 0.0%.
• Focus is now held steady for the duration of an IEC Certified Measurement, so autofocus can no longer drift during a 3-minute capture.
