Support & FAQ

Yes! The core features are completely free: VPD chart, grow diary, templates, equipment database, nutrient calculators, disease gallery, PPFD guide, and more. Pro unlocks advanced features like smart automation, PDF export, BLE sensor support, and more.

Almost everything works offline — VPD chart, diary, templates, calculators, equipment database, disease guide, and more. The only feature that needs WiFi is smart device automation (Pro), because devices are controlled through their manufacturer cloud APIs (Tuya Cloud, Mars Hydro MQTT, etc.). Ads in the free version also need internet.

11 languages: English, Czech, German, Spanish, Dutch, French, Italian, Portuguese, Polish, Thai, and Hebrew. All text in the app is fully translated.

No. There is no sign-up, no login, no cloud. Open the app and start using it immediately. Your data stays on your device.

iOS is on our roadmap. We're an early-stage team still shaping the Android version, so join our Discord for updates.

VPD (Vapor Pressure Deficit) measures the drying power of the air around your plants. It's calculated from temperature and humidity. Optimal VPD ensures your plants transpire at the right rate, leading to better nutrient uptake and growth. GrowVPD Pro shows you the ideal VPD zone for each growth stage.

Yes (Pro feature). The app supports BLE temperature/humidity sensors for live VPD readings directly on the chart. Compatible sensors include standard BLE environmental sensors.

Currently supported: Tuya / Smart Life and Mars Hydro. In beta: AC Infinity, Spider Farmer, Vivosun, Bluelab, and SANlight. No extra hub needed — you can mix devices from different brands in one automation rule. We're actively testing with real devices from every brand. Note: automation requires WiFi since devices are controlled via their cloud APIs.

You create automation rules with conditions (e.g., "if VPD > 1.5 kPa, turn on humidifier"). The app checks your sensors every 15 minutes and triggers actions automatically. 12 condition types are available including temperature, humidity, VPD, CO2, PPFD, and soil moisture.

No. Automation runs in the background using Android's WorkManager. The app checks your sensors and executes rules every 15 minutes even when closed.

Pro unlocks: Smart Device Automation (8 platforms: Tuya, Mars Hydro, AC Infinity, Spider Farmer, Vivosun, Bluelab, SANlight, Sonoff/Zigbee), Tuya Cloud Bridge wizard, 24/7 Hub Mode, Multi-Device Sync (Beta), Light Scheduling, Equipment Profiles, Diary Export (PDF/JSON), BLE Sensor, Analytics & Predictions, Photo Watermarking, Photo Privacy, and ad-free experience.

Three options: $3.99/month, $24.99/year (save 48%), or $49.99 lifetime (pay once, keep forever). All through Google Play or App Store.

Yes, anytime. Go to Google Play Store or App Store → Subscriptions → GrowVPD Pro → Cancel. You keep Pro until the end of the billing period.

A 5-step in-app guided setup that connects your own Tuya developer credentials so cloud-only sensors (battery WiFi temp/humidity, CO2, cameras) work in GrowVPD Pro. No PC required, takes 15–30 minutes the first time. See the Cloud Bridge guide for the walkthrough.

Hub Mode turns an old Android phone into an always-on relay for automation rules, BLE sensors and Cloud Bridge. Foreground service, boot auto-start, battery-optimisation whitelist. Great if your daily phone goes to sleep. See the Hub Mode guide.

When you mark a grow as harvested, GrowVPD Pro automatically computes wet/dry yield, g/watt, g/plant, cycle days and wet:dry ratio from your diary entries and tent setup. The cure log tracks RH and days in jars. See the Harvest Tracking guide.

Yes. Settings → Demo data populates strains, grows and 30 days of sensor history so you can explore VPD chart, automation, harvest stats and watermarking on your own time. One tap clears it all. See the Demo Mode guide.

Yes — one tap in Settings → Privacy. Crash reporting is anonymous (no PII, no plant info, no diary content) and only sends stack traces so we can fix bugs before they bite you. Off by default in Pro Lifetime EU users; toggle anytime.

All data is stored locally on your device only. We have no servers, no cloud, no accounts. Your photos, diary entries, and settings never leave your phone. See our Privacy Policy for details.

You can export your diary as PDF or JSON (Pro feature). For full backup, your data is included in Android's standard backup if enabled in your device settings.

Yes. GrowVPD Pro offers PIN lock, biometric unlock (fingerprint/face), stealth mode (disguised icon), and photo privacy (hide from gallery). All in Settings.