hey abby vs VPD Chart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
hey abby
This app guides users through plant cultivation from seed to harvest with step-by-step video instructions. It offers tools to track plant progress, maintain detailed grow diaries with data charts, and manage climate settings.
- Step-by-step video grow instructions
- Plant progress tracking
- Detailed grow diaries
- Climate management tools
- Grow community access
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Grow skills, grow journal tools, smart add-ons and the best grow community, with hey abby APP, anyone can GROW LIKE A PRO. Hey abby app is now open to all growers. hey abby is tailored for every grower, at any skill level. Never worry about your FIRST grow. You'll be guided seamlessly from seed to harvest through step-by-step video instructions. Also, keep refining your skills through the process of growing with hey abby. Track plant progress in the log, keep grow diaries with detailed data charts & fine-tune the climate with just a few taps - all within the convenience of a single app. Whether you're beginning with seeds or clones, autoflower or photoperiod, hey abby offers a comprehensive solution for healthy plants, from in-depth instructions to efficient grow log tools. It's the ultimate plant growing APP, and the only tool you need for growing cannabis at home. Dive into this resourceful grow journal APP now and watch your plants thrive!
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/
Screenshots
Verdict
The clearest difference is rating: VPD Chart at 4.5 against hey abby's 3.4. VPD Chart also leads on review sentiment (74% vs 36%). hey abby's advantage is in-app purchases (none vs 2) and ratings volume (107 vs 30). 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
Both are free to download. VPD Chart sells 2 in-app purchases, starting at $3.99 per month. hey abby asks for nothing beyond the download.
VPD Chart holds the better App Store score, 4.5 against 3.4. Both are backed by a comparable volume of ratings — 107 and 30 respectively. Written reviews point the same way: 36% of hey abby's written reviews are positive against 74% of VPD Chart's.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 15, 2026 and October 14, 2026 respectively.
| Parameter | hey abby | VPD Chart |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (107 ratings) | 4.5 (30 ratings) — better |
| Positive reviews | 35.7% of reviews | 73.7% of reviews — better |
| Number of ratings | 107 — better | 30 |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 90 MB | 49 MB |
| Age rating | 17+ | 4+ |
| Developer | CL Design Studio LLC | INNOVO DEV S.R.L. |
Customer experience
hey abby
VPD Chart
Bugs and requests
hey abby
Reported bugs
27 issues- App keeps changing settings
- Light panel went out
- App skipped drying process
- Cannot get box temp under 75 degrees
- App logs out frequently
Show 22 moreShow fewer
- App fails to open entirely
- Bad Gateway (502) error
- Playback function freezes the entire app
- German translation is worse than Google Translate
- Cannot change language to English
- App bricks itself when checking messages
- Cannot access Hey Abby store successfully
- IOS widget doesn’t work
- App crashes and everything stops
- App shows plant environment is bad when ideal
- App says plant light is off when it's on
- Next stage unlock issues
- On time for lights on won’t change
- App in IOS won’t let user in due to Bad Gateway (502)
- App logs users out
- App requires repairing the device after logout
- Light schedule issues (light not turning off)
- App does not provide light for long enough (default mode)
- App requires reset to fix flower mode
- App requires reset to fix Pro mode
- Odor filter not fully effective
- App has bugs with comments being posted twice
Requested features
25 requests- More regular app updates
- Ability to invite others to manage the box
- See environmental details
- Translate app to German
- Improve German translation
Show 20 moreShow fewer
- Allow changing language to English
- More intuitive UI/UX improvements
- Add dark mode option
- Advanced analytics dashboard
- More help for beginners in the app
- Allow switching to quiet mode directly
- Adjust light schedule without reverting
- Fix app issues with changing settings
- Fix app issues with stage unlocks
- Fix app issues with light on time dropdown
- Fix Bad Gateway (502) error
- Fix playback function freezing the app
- Fix IOS widget not displaying metadata
- Allow connection to 5g WiFi
- Fix app bricking when checking messages
- Fix app not allowing new grow without subscription
- Fix app not allowing switching to Pro mode without reset
- Fix app not allowing switching flower mode without reset
- Improve odor filter effectiveness
- Make the grow tank larger
VPD Chart
Not enough reviews yet to summarise bugs or requests.
In-app purchases
hey abby
No 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








