Comparison

VPD Chart vs Cool Cure by Cannatrol

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

VPD Chart

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.

Highlights
  • VPD calculation
  • Interactive VPD chart
  • Sensor integration
  • Zone organization
  • Dew point visualization
  • Grow Timeline
Features
Read full description

The app calculates VPD using air temperature, relative humidity, and canopy temperature. View real-time VPD values on an interactive chart. Connect sensors for automated readings or manually input data via intuitive sliders and text inputs. Key features: • Interactive VPD chart with manual input • Default crop types • Organize charts by assigning them to different zones • Display spots that share the same VPD value • Zoom in and out of the VPD chart with a two-finger pinch and drag to pan around • VPD Target - long-press the chart to set a target VPD value • Dew point area visualization • Grow Timeline • Sync sensor historical data by importing it from sensor's app, via cloud APIs, or bluetooth • Explore sensor history by panning and zooming Supported bluetooth devices: • AC Infinity Cloudcom B2, A2, B1 • SensorPush: HT1, HT.w, HT.xw • Govee: H5051, H5072, H5074, H5075, H5100, H5101, H5102, H5103, H5104, H5105, H5174, H5177, H5179 • SwitchBot: Meter, Plus, Indoor Outdoor • Ruuvi: RuuviTag and RuuviTag Pro • Inkbird: IBS-TH1, IBS-TH1 Plus, IBS-TH2, IBS-TH2 Plus • ThermoPro: TP351, TP357, TP358, TP359 • VIVOSUN AeroLab THB1S • Shelly BLU H&T • Xiaomi Mijia 2 (LYWSD03MMC) (original and pvvx firmware) Supported devices with API connectivity: • Govee • Pulse • UbiBot • Ecowitt • Tuya • SensorPush Educational benefits: • Interactive Learning: Explore the dynamics of VPD based on changes in temperature and relative humidity by manipulating input sliders and animating the chart • Canopy - Air Temperature Link: Easily visualize and set values by linking canopy temperature to air temperature • Chart Bands Control: Toggle chart bands on/off (dew, under transpiration, prop, veg, flower, over transpiration) for a comprehensive understanding Included: 1 chart with manual input and grow timeline, device data sync & explore, default crops VPD Chart Plus subscription unlocks: • Unlimited charts • Automated VPD calculation by using sensors as the input data source • Background monitoring and Alerts (temperature, RH, VPD) • VPD history timeline, available on sensor-driven VPD charts • Custom crops Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Cool Cure by Cannatrol

Remotely monitor and manage drying, curing, and storage cycles for your C2 and CLE units. Adjust temperature, dew point, and lighting, and receive instant alerts for optimal results.

Highlights
  • Remote monitoring and adjustment
  • Real-time temperature and dew point control
  • Customizable cycle times
  • Interior LED lighting control
  • Instant alerts and updates
  • Vaportrol® Technology integration
Features
Read full description

Designed for the C2 and CLE units, the app connects seamlessly over Wi-Fi to give you remote access and precision management of your dry, cure, and store cycles. Features: • Monitor and adjust temperature and dew point in real time • Set and manage dry/cure cycle times from anywhere • Customize interior LED lighting aesthetics • Get instant alerts and updates for peace of mind • Simple, intuitive interface designed for growers With Cannatrol’s patented Vaportrol® Technology, Cool Cure ensures a consistent, science-backed environment for preserving trichomes and terpenes. Now, you have the power to control it all, right from your phone. Cool Cure by Cannatrol: Remote control. Perfect results.

Screenshots

VPD Chart4 screens
Cool Cure by Cannatrol4 screens

Verdict

The call

The clearest difference is review sentiment: VPD Chart at 74% against Cool Cure by Cannatrol's 0%. VPD Chart also leads on rating (4.5 vs 2.7) and ratings volume (30 vs 3). Cool Cure by Cannatrol's advantage is in-app purchases (none vs 2). On price, update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. VPD Chart sells 2 in-app purchases, starting at $3.99 per month. Cool Cure by Cannatrol asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

VPD Chart holds the better App Store score, 4.5 against 2.7. That said, the two scores are not equally well evidenced: VPD Chart has 30 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 74% of VPD Chart's written reviews are positive against 0% of Cool Cure by Cannatrol's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 22, 2026 and September 3, 2026 respectively.

Scorecard5 real differences · 5 level
VPD Chart versus Cool Cure by Cannatrol: the parameters behind the verdict, then further details
ParameterVPD ChartCool Cure by Cannatrol
PriceFreeFree
Rating4.5 (30 ratings) — better2.7 (3 ratings)
Positive reviews73.7% of reviews — better0.0% of reviews
Number of ratings30 — better3
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size49 MB25 MB
Age rating4+17+
DeveloperINNOVO DEV S.R.L.Cannatrols

Customer experience

VPD Chart

All ratings30 ratings
Positive86.7%
Neutral3.3%
Negative10.0%
Written reviews19 reviews
Positive73.7%
Neutral0.0%
Negative26.3%

Cool Cure by Cannatrol

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

2 purchases

VPD Chart

Subscriptions2
  • VPD Chart Plus (monthly)3 Days trial$3.991 Month
  • VPD Chart Plus (annual)3 Days trial$29.991 Year
None

Cool Cure by Cannatrol

No in-app purchases

Questions

Is VPD Chart free?
VPD Chart is free to download, with in-app purchases available.
Is Cool Cure by Cannatrol free?
Cool Cure by Cannatrol is free to download, with no in-app purchases.
Which has better reviews, VPD Chart or Cool Cure by Cannatrol?
VPD Chart is rated higher. VPD Chart averages 4.5 out of 5 from 30 ratings, while Cool Cure by Cannatrol averages 2.7 from 3 ratings.
Do VPD Chart or Cool Cure by Cannatrol have ads?
Neither VPD Chart nor Cool Cure by Cannatrol shows ads.
Which is updated more often, VPD Chart or Cool Cure by Cannatrol?
VPD Chart ships an update every 3 weeks, and Cool Cure by Cannatrol every 3 weeks. Most recently, VPD Chart was updated on September 22, 2026 and Cool Cure by Cannatrol on September 3, 2026.

Other comparisons