A dew-point, condensation, comfort, mold-risk, HVAC, curing, fermentation, IAQ scoring, and room-humidity planning tool — now with a VPD Calculator for plant growers and a Heat Safety tool for outdoor workers.
Vapor Pressure Deficit for plant growers. Enter air temp and RH, pick a grow stage (Propagation, Seedling, Vegetative, Early Flower, Late Flower) and instantly see leaf VPD with color-coded zone verdict. A leaf-temperature offset slider (0–5 °C) accounts for evaporative cooling. Targets sourced from Cornell eGRO E-816 and industry consensus.
Shade Wet-Bulb Globe Temperature using the Stull (2011) wet-bulb approximation (WBGT = 0.7 × Tw + 0.3 × Tdb). Displays the U.S. Army flag color (White/Green/Yellow/Red/Black), ACGIH TLV work–rest schedule by work intensity, and OSHA heat index risk level. Ideal for outdoor workers, coaches, and event planners.
Air VPD now appears alongside dew point in the Room Detail readings list and current-state summary card. Plant growers tracking humidity in grow rooms can monitor VPD history at a glance without leaving their room view.
Dewpoint Rooms helps you understand temperature and humidity decisions in homes, workshops, basements, cellars, kitchens, grow rooms, and job sites. From protecting instruments and wine collections to diagnosing HVAC, scoring indoor air quality, or planning safe work in summer heat — every tool is science-grounded and works completely offline.
This image shows the current iPhone app interface prepared for review-facing screenshots.
No account. No network calls. No analytics. No third-party SDKs. All data stays on your device. CSV export only transfers data when you tap Share.
Last updated June 15, 2026 · Version 1.3 (build 4)