Comparison

VPD Chart vs Spider Farmer

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

Spider Farmer

Control your indoor grow environment with precision and ease. This app offers intuitive controls and real-time insights to optimize plant cultivation, leading to smarter and more sustainable yields.

Highlights
  • Precision grow environment control
  • Real-time insights
  • Intuitive controls
  • Optimize plant cultivation
  • Smarter yields
  • Sustainable yields
Read full description

Welcome to the future of indoor gardening with the Spider Farmer Grow Genius System Controller app. Revolutionizing the way you cultivate your plants, this innovative application brings precision, convenience, and efficiency to your fingertips. Whether you're a seasoned grower or just beginning your green journey, our app is your ultimate companion, offering intuitive controls and real-time insights to optimize every aspect of your grow environment. Say goodbye to guesswork and hello to smarter, more sustainable yields with Spider Farmer. Let's embark on a journey where technology meets nature to elevate your growing experience like never before.

Screenshots

VPD Chart4 screens
Spider Farmer4 screens

Verdict

The call

The clearest difference is rating: VPD Chart at 4.5 against Spider Farmer's 3.3. VPD Chart also leads on review sentiment (74% vs 43%). Spider Farmer's advantage is in-app purchases (none vs 2) and ratings volume (135 vs 31). 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. Spider Farmer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

VPD Chart holds the better App Store score, 4.5 against 3.3. Both are backed by a comparable volume of ratings — 31 and 135 respectively. Written reviews point the same way: 74% of VPD Chart's written reviews are positive against 43% of Spider Farmer's.

UpkeepUpdate frequency

VPD Chart ships an update every 3 weeks, Spider Farmer every 5 weeks. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
VPD Chart versus Spider Farmer: the parameters behind the verdict, then further details
ParameterVPD ChartSpider Farmer
PriceFreeFree
Rating4.5 (31 ratings) — better3.3 (135 ratings)
Positive reviews73.7% of reviews — better43.0% of reviews
Number of ratings31135 — better
Update frequencyEvery 3 weeks — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.114.0 — better
Further details — not scored
Size49 MB61 MB
Age rating4+4+
DeveloperINNOVO DEV S.R.L.HY AGRICULTURE WHOLESALE LIMITED

Customer experience

VPD Chart

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

Spider Farmer

All ratings93 ratings
Positive40.9%
Neutral12.9%
Negative46.2%
Written reviews165 reviews
Positive43.0%
Neutral17.6%
Negative39.4%

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

Spider Farmer

No in-app purchases

Questions

Is VPD Chart free?
VPD Chart is free to download, with in-app purchases available.
Is Spider Farmer free?
Spider Farmer is free to download, with no in-app purchases.
Which has better reviews, VPD Chart or Spider Farmer?
VPD Chart is rated higher. VPD Chart averages 4.5 out of 5 from 31 ratings, while Spider Farmer averages 3.3 from 135 ratings.
Do VPD Chart or Spider Farmer have ads?
Neither VPD Chart nor Spider Farmer shows ads.
Which is updated more often, VPD Chart or Spider Farmer?
VPD Chart ships an update every 3 weeks, and Spider Farmer every 5 weeks. Most recently, VPD Chart was updated on October 22, 2026 and Spider Farmer on October 24, 2026.

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