PlantHelper
Every plant, organised
Search, filter and sort by category, growth stage, medium, location and status.
Private by design · Works offline
The plant journal that stays on your phone.
PlantHelper tracks watering, feeding, measurements, climate and growth photos for every plant you grow. No account, no ads, no tracking.
- journal entry types
- 10
- grower calculators
- 5
- accounts, ads or trackers
- 0
Features
Everything a grow needs, in one journal
From a windowsill herb to a hydroponic tent, PlantHelper keeps the full history of each plant in one place.
A detailed care journal
Log watering, feeding, measurements, climate, pests, training, transplants, harvests, stage changes and notes.
Care schedule and reminders
Set watering and feeding intervals per plant, mark tasks done in one tap and get an optional daily reminder.
Growth photos
Take or pick photos, browse the gallery and compare before and after. Stored copies have location data removed.
Growth charts
See height over time, total growth, the average rate and the rate over the last 7 days.
Grower tools
VPD, daily light integral, PPM and EC conversion, a nutrient mixer and a unit converter.
Daily care
Know what needs attention today
The home dashboard works out which plants are due for water or food from the intervals you set and the entries you log.
- Today's care and what is coming up next, at a glance
- One-tap Mark done for watering and feeding
- One optional notification a day, only when something is due
Growth tracking
Measure progress instead of guessing
Record height, width, node and leaf counts as you go. PlantHelper turns the readings into charts and growth rates for each plant.
- Current height, total growth and average daily rate
- Growth over the last 7 days, to spot a slowdown early
- Before and after photo comparison
Grower tools
The calculations growers do every day
Built-in calculators that follow your unit settings, so there is nothing to convert by hand.
VPD
Vapour pressure deficit from temperature and humidity, with the ideal range for the growth stage.
Light (DLI)
Daily light integral from PPFD and hours of light, checked against a recommended range.
PPM and EC
Convert between EC, CF and the 500, 640 and 700 PPM scales.
Nutrient mixer
How many millilitres of each product to add for the size of your tank.
Unit converter
Length, volume, temperature and weight.
Nutrient library
Your fertilisers and additives with their label doses, ready to use in feed entries.
Results are guidance only. Always follow your product labels and watch how your plants respond.
Privacy
Your data never leaves your device unless you export it
PlantHelper has no server behind it. Your plants, journal and photos live in the app's private storage and nowhere else.
- No account, no analytics and no advertising
- The Android app does not request internet access
- Android cloud backup is turned off for app data
- Export a backup (.zip) or your journal (.csv) whenever you like
- Delete everything from Settings in one step
FAQ
Common questions
Do I need an account?
No. There is no sign-up and no login. Install the app and add your first plant.
Does it work without internet?
Yes. The Android app does not request internet access at all, so everything works offline.
How do I move my data to a new phone?
Open Settings and export a backup (.zip), then import it on the new phone. You can merge it with what is already there or replace everything with the backup.
Which permissions does the app use?
Camera, only when you take a photo. Notifications, only if you turn the daily reminder on. Run at startup, to restore that reminder after the phone restarts. Photos from your gallery come through the system photo picker, so the app only sees the ones you choose.
Which units are supported?
Metric or imperial measurements, °C or °F, and nutrient strength as EC or PPM on the 500, 640 or 700 scale. Values are stored in metric and EC, so you can switch at any time.
Is the source code available?
Yes. The code is public on GitHub under the PolyForm Noncommercial License 1.0.0, which allows use, modification and sharing for noncommercial purposes.
Read the code behind the claims
PlantHelper's source is public, so every privacy statement on this page can be checked against what the app actually does.