# GrowVPD Pro: VPD Chart — Calculator, Grow Diary & PPFD > Calculator, Grow Diary & PPFD (iPhone/iPad app by VPD Labs LLC.) - Source: https://appshunter.io/ios/app/growvpd-pro-vpd-chart/id6777013089 (this page in markdown: same URL + `.md`) - Developer: [VPD Labs LLC](https://appshunter.io/developer/6777013091) - Category: Utilities - Price: Free with in-app purchases - Age rating: 12+ - Requires: iOS 16.0 · 49 MB - Languages: American English, Czech, Dutch, French (France), German (Germany), Hebrew, Italian, Polish, European Portuguese, European Spanish and 1 more - Released: 2026-10-25 - Data updated: 2026-10-28 ## What is GrowVPD Pro? GrowVPD Pro is a VPD calculator and VPD chart in one, with a grow diary, a plant problem guide and smart device automation. Enter temperature and humidity, or connect a sensor, and see the vapor pressure deficit with leaf-temperature correction. No account, no ads. Most features are free and will stay free. VPD CHART, TABLE AND CALCULATOR The VPD table colors the target zone for every stage — seedling, veg, flower and drying — so you know whether to raise or lower the humidity in your grow tent. Altitude adjustment, °C/°F toggle and live data from Bluetooth sensors. PLANT PROBLEM GUIDE Gallery of 41 diseases, deficiencies, and pests with symptoms, hand-drawn botanical plates, and specific treatments. Fully offline. GROW DIARY Entries from seed to harvest — temperature, humidity, VPD, pH, EC/PPM, PPFD, height, watering, nutrients, photos, and video. Harvest records with wet and dry weight per plant and yield efficiency (g/watt, g/plant). Side-by-side comparison of multiple grows, automatic grow age tracking, strain lineage. SMART AUTOMATION Rules based on VPD, temperature, humidity, CO2, PPFD, soil moisture, and water level. Thirteen phase presets from seedling through veg and flower to drying and curing, hysteresis, gradual light sunrise, and emergency override. Cross-brand automation — any sensor can trigger any outlet, air conditioner, or fan. YOUR DEVICES IN ONE APP • Local control where the device supports it: Tuya WiFi (v3.3-v3.5) — outlets, air conditioners, dehumidifiers, lights, and fans, controlled directly over your home network. • Cloud Bridge for cloud-only-by-design devices: AC Infinity, Spider Farmer, Vivosun, Bluelab — a secure connection through the manufacturer's cloud. • MQTT and BLE: Mars Hydro (BLE pairing + Wi-Fi/MQTT control), Tuya Zigbee hub with battery-powered sensors, BLE temperature/humidity sensors. Tuya WiFi and Zigbee, Mars Hydro, and Bluetooth sensors are verified on real hardware. Other platforms (AC Infinity, Spider Farmer, Vivosun, Bluelab, SANlight) are being actively tested and expanded. MULTI-DEVICE SYNC Pair with the GrowVPD Desktop Hub by QR code. Diary entries, photos and rules stay in sync, end-to-end encrypted — over your local network or our encrypted relay. PPFD / DLI METER Lighting recommendations by growth phase and light schedule, dynamic DLI calculation, and a PPFD meter that estimates light with the phone's camera. Try it with three free measurements; unlimited with Pro. CALCULATORS AND TEMPLATES Nutrient dosing, substrate mixing, living soil, yield estimation, and airflow calculation (CFM). 20 ready-made grow templates with weekly temperature, humidity, and light targets. EQUIPMENT AND NUTRIENT DATABASE 223 products from 46 brands — lights, tents, ventilation — and 287 nutrient products. A setup assistant calculates power draw, airflow, and tent coverage. PRIVACY Data stays on your phone. PIN or biometric lock, hidden photos from the device gallery, stealth mode. Green light turns the display into a safe light for nighttime plant checks. 11 LANGUAGES Czech, English, German, Spanish, Dutch, French, Italian, Portuguese, Polish, Thai, and Hebrew. The app is free and genuinely usable without paying — VPD chart, calculators, diary, templates, disease gallery and device automation, all without ads. The free tier covers 1 grow, 1 tent, 3 devices and 1 automation rule; Pro lifts those limits and adds the PPFD/DLI meter, diary video, the full archive and more tools. Built by a small team of growers and developers — actively maintained and shaped by your feedback. From growers, for growers. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://growvpd.pro/privacy/ ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | GrowVPD Pro Yearly | $24.99 | per year | | GrowVPD Pro Monthly | $3.99 | per month | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | GrowVPD Pro Lifetime | $49.99 | one-time | ## Is GrowVPD Pro safe? Not enough ratings yet to assess GrowVPD Pro. ## Is GrowVPD Pro legit? GrowVPD Pro: VPD Chart has limited verification signals. The AppsHunter Legitimacy Score for GrowVPD Pro is 58 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 3 releases) ### 1.0.2 — 2026-10-28 What's new in 1.0.2 • Try the PPFD meter: three free measurements without Pro. The PPFD tab now opens on the live meter; unlimited measuring stays with Pro. • Sample diaries: every entry now has a hand-drawn plate of the plant at that week's stage. • Smaller fixes and polish. ### 1.0.1 — 2026-10-26 What's new in 1.0.1 • Free vs Pro at a glance: the upgrade screen now shows a side-by-side table with the free limits. Growth analytics, grow comparison and the short grow report are now part of Pro. • One VPD everywhere: cards, charts and the diary show leaf VPD with your own leaf-temperature offset, and sensor calibration applies to every reading. • Night-time targets shift only for rules made by automatic setup; rules you set up yourself keep exactly your thresholds. • More reliable sync between your devices: rules, rooms and tents, grow events, the seed bank, device moves and plug roles. • Tuya with your own IoT keys: setup checks the keys with Tuya before saving and connects the account. • Contact support from Settings: the e-mail includes your phone model, app version and language. • More of the app in your language, including 10 plant-problem cards that were in English. • Sample diaries: the photos now match each week's notes. • Smaller fixes and polish. ### 1.0 — 2026-10-25 No release notes. ## Related topics [vpd chart](https://appshunter.io/ios/topics/vpd-chart) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-28.*