DarkRoom RT

DarkRoom is a field toolkit for gamma radiographic testing (RT) technicians shooting Ir-192 and Co-60. EXPOSURE • Shot time from the field formula with your own R factor per isotope • Pick a pipe and shot technique and thickness and SFD fill themselves in • Boundary distances at 2, 5 and 100 mR/hr, plus your own rates • "Show your work" breakdown for every result SHOT TIMER • Countdown on every tab, Live Activity on the Lock Screen and Dynamic Island • Saved shots you can start with one tap • Apple Watch: countdown, saved shots, and a strong end-of-shot haptic CALCULATORS Geometric unsharpness, minimum SFD, inverse square law, belt spacing, equivalent thickness, exclusion zone and IQI selection. PIPE CHART Every size and schedule, favorites synced through iCloud, film-based belt spacing, one tap to Exposure. CODES & FIELD TOOLS Plain-language limits and acceptance checkers for API 1104 (22nd Ed.), ASME B31.3, ASME Section V and AWS D1.1:2025. TRY IT FREE Every tool is free for 7 days. After that, unlock DarkRoom with a one-time purchase. No subscription, no account, no data collected. DarkRoom is a calculation aid for qualified RT personnel. It does not replace your training, your written procedure, or a survey meter. Confirm every boundary with a calibrated survey meter.