---
title: "VPD Tool - Reviews, Revenue and Downloads in Japan | Apple App Store"
description: "Know your VPD in seconds. Enter temperature & humidity (or tap the interactive heatmap) to see Leaf VPD and Air VPD with scientifically labeled isolines. Choose Seedling / Veg / Flower / Late Flowerin"
---

# VPD Tool — Japan

![VPD Tool App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/b8/09/bd/b809bddc-1637-affa-0983-f1f7aac964b9/AppIcon-0-0-1x_U007epad-0-1-85-220.png/400x400bb.png)

**Developer:** [Nicholas Hwang](https://apptail.io/developer/nicholas-hwang-hQaaz)
**Category:** Utilities
**Rating:** N/A (0 ratings)
**Price:** ¥100.00
**Bundle ID:** Shindiggery-Enterprises.VPD-Tool
**Store:** Apple App Store
**Country:** Japan
**Version:** 1.0.5 (released 2026-05-10)
**Original Release:** 2025-08-19

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/jp/app/app/id6751213834)
**AppTail Page:** [https://apptail.io/app/vpd-tool-bAFw/japan](https://apptail.io/app/vpd-tool-bAFw/japan)

## VPD Tool Description
Know your VPD in seconds.
Enter temperature & humidity (or tap the interactive heatmap) to see Leaf VPD and Air VPD with scientifically labeled isolines. Choose Seedling / Veg / Flower / Late Flowering to see target VPD ranges and how best to nudge your environment to “ideal.”

Why growers love it
• Interactive heatmap: drag to explore temperature–humidity combos
• Stage presets: recommended VPD bands by plant development stage
• Leaf vs Air: leaf–air offset, dew point, absolute humidity
• Beautiful widgets: small/medium/large Home & Lock Screen widgets
• Private by design: on-device calculations, no account required

Details
• VPD = es(T) × (1 − RH/100); leaf VPD uses leaf temperature (air + ΔT)
• Absolute humidity via water vapor partial pressure (ideal gas law)
• Full support for °C/°F, metric/imperial
• Export logs to CSV


Support
Questions or feedback: support@nicksberryfarm.com

## VPD Tool Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/19/9a/2c/199a2c9d-a153-3b7b-a88a-188b05d15133/1.png/1290x2796.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/57/30/2e/57302e22-c4e5-9a7b-8fbe-5c4883d5a4b7/2.png/1290x2796.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/2e/f6/62/2ef662cf-badf-4cd1-9dfd-eb9b1ebe929e/3.png/1290x2796.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/7a/10/c8/7a10c8aa-6180-1346-ac1a-97f210ced915/4.png/1290x2796.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/64/6b/5b/646b5b12-d1f2-1ca1-7cc3-54654317e795/5.png/1290x2796.png)







## VPD Tool Available In
- [Czechia](https://apptail.io/app/vpd-tool-bAFw/czechia)
- [Japan](https://apptail.io/app/vpd-tool-bAFw/japan)
- [Kuwait](https://apptail.io/app/vpd-tool-bAFw/kuwait)
- [Taiwan](https://apptail.io/app/vpd-tool-bAFw/taiwan)

---

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