VPD Chart vs Chaac Climate Control
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- VPD calculation
- Interactive VPD chart
- Sensor integration
- Zone organization
- Dew point visualization
- Grow Timeline
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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/
Chaac Climate Control
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Chaac ist ein Komplettes Indoor Grow Environment Dies ist ein Datenlogger Server mit Visualisierung.
Screenshots
Verdict
The clearest difference is in-app purchases: Chaac Climate Control at none against VPD Chart's 2. Chaac Climate Control also leads on iOS requirement (12.0 vs 15.1). VPD Chart's advantage is update cadence (every 3 weeks vs every 2 months). On price, 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
Both are free to download. VPD Chart sells 2 in-app purchases, starting at $3.99 per month. Chaac Climate Control asks for nothing beyond the download.
VPD Chart ships an update every 3 weeks, Chaac Climate Control every 2 months. The most recent releases landed on October 9, 2026 and October 5, 2026 respectively.
| Parameter | VPD Chart | Chaac Climate Control |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (30 ratings) — better | — |
| Positive reviews | 73.7% of reviews | — |
| Number of ratings | 30 — better | — |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.1 | 12.0 — better |
| Further details — not scored | ||
| Size | 49 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | INNOVO DEV S.R.L. | PHILIPP KONECZNY |
In-app purchases
VPD Chart
- VPD Chart Plus (monthly)3 Days trial$3.991 Month
- VPD Chart Plus (annual)3 Days trial$29.991 Year
Chaac Climate Control
No in-app purchases
Questions
Is VPD Chart free?
Is Chaac Climate Control free?
Do VPD Chart or Chaac Climate Control have ads?
Which is updated more often, VPD Chart or Chaac Climate Control?
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