VPD Calculator
Greenhouse VPD Calculator is a local-first greenhouse climate calculator for manual vapor pressure deficit checks.
Common questions
### What does the app calculate?
The app calculates VPD from manual air temperature, leaf temperature, and relative humidity values. It can also keep local saved scenarios for repeat greenhouse checks.
### Who is the app for?
Greenhouse VPD Calculator is built for greenhouse growers, nursery teams, propagation staff, indoor horticulture operators, and anyone doing manual climate checks from readings they already have.
### Does the app connect to sensors or greenhouse controllers?
No. Version 1.0 is manual entry only. It does not pair with Bluetooth or Wi-Fi sensors, and it does not control fans, vents, humidifiers, dehumidifiers, or irrigation equipment.
### Does the app work offline?
Yes. The app is local-first and does not require a network connection for core calculations, presets, or saved scenarios.
### Does the app tell me one perfect VPD target for every crop?
No. Greenhouse VPD Calculator is a math tool and planning aid. It does not replace crop-specific guidance, local experience, or instrument checks.
### Is this a cannabis app?
No. Greenhouse VPD Calculator is positioned as a general greenhouse and indoor horticulture utility. It does not use cannabis-specific branding, content, or review framing.
### Are my readings synced anywhere?
No. Version 1.0 has no account system and no cloud sync.
### Can I save repeat climate scenarios in the app?
Yes. Version 1.0 can keep local saved scenarios on the current device so you can compare repeat greenhouse checks without sending data to a server.
### Are the results guaranteed?
No. Use the app as a starting point for manual climate checks. Always confirm readings with actual instruments and plant response before making operational changes.
Contact
- Support email:
yangguangwin@icloud.com - Include your device model, iOS version, app version, and reproduction steps when you report an issue.