VPD Chart vs GrowDat
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/
GrowDat
This app helps users meticulously track and analyze their cannabis cultivation process. It functions as a digital journal, offering insights into plant health and growth stages, and connects users with a global community of growers for shared learning and inspiration.
- Digital grow journal
- Data dashboard and analysis
- Growth stage tracking
- Community forum
- VPD calculator
- Smart reminders
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### GrowDat – Track. Learn. Grow. Together. ### GrowDat is your smart grow app for tracking, analyzing, and improving your cannabis grows. Whether you’re a beginner or experienced grower, GrowDat helps you organize your grow, understand your data, and connect with a global grow community. • Your Digital Grow Journal Document your grow from seed to harvest — clean, visual, and intuitive. Create detailed plant profiles and log every action: watering, feeding, defoliation, pH, EC, temperature, humidity, light intensity, and more. GrowDat turns your grow data into insights that help you grow smarter, not harder. • All Your Data in One Dashboard Say goodbye to messy notes and spreadsheets. GrowDat keeps everything organized in a clear dashboard — track trends, analyze progress, and identify what makes your plants thrive. Whether you grow indoors or outdoors, every parameter is visualized so you can focus on what matters most: healthy plants and better yields. • From Veg to Flower to Harvest Track every growth stage of your plants with ease. GrowDat helps you stay on top of your grow cycle — from germination and veg to flowering and drying. Use smart reminders to water, feed, or adjust your lights at the perfect time. No more guessing — just precise, data-driven cultivation. • Connect. Learn. Inspire. Join a thriving community of growers worldwide. Follow other grows, share your progress, and learn from real experiences. Comment, exchange tips, and explore new techniques — GrowDat is built like a social network for growers who love plants as much as you do. Together, we create a world where knowledge and passion for growing meet. • Smart Tools for Smart Growers GrowDat gives you the professional tools you need to manage your grow efficiently: VPD calculator for perfect climate balance Growth stage tracking with visual progress Advanced charts for light, humidity, temperature, and EC Photo journal for visual documentation Data sync across multiple devices (Pro feature) Whether you’re growing one plant or managing an entire room — GrowDat adapts to your workflow. • Grow Smarter with Insights GrowDat is more than a diary — it’s a grow tracker and assistant that helps you understand your plants like never before. Track, compare, and optimize each grow to improve quality, efficiency, and consistency. Our clean interface and detailed analytics make it easy to see how every change affects your results. • Why GrowDat? All-in-one grow journal & grow tracker Community-driven learning platform Beautiful, data-driven dashboard Smart reminders & analysis tools Built by growers, for growers Download GrowDat now! Track your grow, connect with other growers, and master your cultivation. Track. Learn. Grow Together. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: GrowDat at 5.0 against VPD Chart's 4.5. VPD Chart's advantage is ratings volume (30 vs 3) and update cadence (every 3 weeks vs every 2 months). On price, ads, in-app purchases and monetization model 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 and GrowDat sells 5 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
GrowDat holds the better App Store score, 5.0 against 4.5. 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.
VPD Chart ships an update every 3 weeks, GrowDat every 2 months. The most recent releases landed on September 22, 2026 and September 8, 2026 respectively.
| Parameter | VPD Chart | GrowDat |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (30 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 73.7% of reviews | — |
| Number of ratings | 30 — better | 3 |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 49 MB | 121 MB |
| Age rating | 4+ | 17+ |
| Developer | INNOVO DEV S.R.L. | GrowDat UG (haftungsbeschrankt) |
Customer experience
VPD Chart
GrowDat
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
GrowDat
- Monthly subscription7 Days trial$2.991 Month
- Yearly subscription7 Days trial$24.991 Year
- Support GrowDat$1.99
- Support GrowDat Plus$4.99
- Support GrowDat Max$9.99







