VPD Chart

VPD Chart

Democratization of VPD

26 ratings
19 reviews
$0.99 Free
In-App Purchases

Lowest price: Free a year ago (-100%)


Price history


Details

  • Released
  • Updated
  • December 8, 2023
  • June 10, 2026

Features

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iphone
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About

This app calculates Vapor Pressure Deficit (VPD) using air temperature, relative humidity, and canopy temperature. It offers real-time charting, sensor integration, and educational tools to understand plant growth environments. Organize data by zones and visualize dew point areas.

VPD calculation
Interactive VPD chart
Sensor integration
Zone organization
Dew point visualization
Grow Timeline
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What's New in VPD Chart

3.2.0

June 10, 2026

The app is now fully localized! VPD Chart is available in English, German, Spanish, French, Italian and Portuguese (Brazil and Portugal). Also improved: • Refined chart legend and chart settings • Various interface fixes Happy growing!

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Subscription plans

VPD Chart Plus (monthly)

Unlimited charts & sensor connectivity

$3.991 Month
3 Days trial
Price Updates
July 12, 2026$3.99
August 1, 2025$2.99
June 26, 2025$3.99
How to cancel VPD Chart subscription ⁉️

User reviews

I use this app everyday!

This is such a great little app with updates that provide useful improvements with a simple elegant layout to track VPD in realtime. I track over eight G hydrometers at times and it reads sensors simultaneously no problems. Great work, thank you!

So far so good. 1 suggestion

Just a suggestion for the developers, add support for WiFi hygrometers, such as ones from the brand Govee and whatnot. I had no issues connecting to my bluetooth Govee hygrometers, but the WiFi version is unavailable

Working nicely

Working nicely. Unfortunately no support for my x351 Version of ThermPro

Update requires pay

What was once a very reliable tool has now become a cash grab. To use Bluetooth sensors, (which was free before today) to check temperatures now, is no longer free. Thanks for memories

Great with Govee

Works great, I wish Govee made there app as simple and useful, seriously. Highly recommended this app even if you don’t use the Bluetooth connection. If you could add a logging feature to track trends and records it would be 6stars. Thank you.

Update: The recent update was a great improvement. It updates smoother and repopulates the list with no problems shining different sensors.
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Response from developer

Thanks for your message! Consistent logging would require the app to always run in the background. However, this is not possible due to iOS app optimization limitations.

FAQ

What does the VPD Chart app do?

The app calculates Vapor Pressure Deficit (VPD) using air temperature, relative humidity, and canopy temperature. It provides an interactive chart to view real-time VPD values, allowing users to understand and manage plant growth environments.

What are the key features of VPD Chart?

Key features include an interactive VPD chart with manual input, default crop types, the ability to organize charts by zones, visualization of dew point areas, and a Grow Timeline. It also supports integration with various Bluetooth and API-connected sensors.

How much does VPD Chart cost?

The app offers a free version with one chart and default crops. A 'VPD Chart Plus' subscription unlocks unlimited charts and automated VPD calculation using sensors, as well as custom crop options.

What devices are compatible with VPD Chart?

The app supports a wide range of Bluetooth sensors from brands like SensorPush, Govee, SwitchBot, Ruuvi, Inkbird, ThermoPro, VIVOSUN, and Shelly. It also supports API connectivity for certain Govee, Pulse, UbiBot, and Ecowitt devices.

How can I use VPD Chart for educational purposes?

The app facilitates interactive learning by allowing users to manipulate input sliders for temperature and humidity to see how VPD changes on the animated chart. It also helps visualize the link between canopy and air temperature, and offers chart band controls for a comprehensive understanding of different growth stages.