Blackthumb: Houseplant care
Reminder, Light Meter, Tracker
About
This app helps you keep your houseplants alive by providing a light score for each plant and location, and by setting up customized care reminders. Organize your plants by space and track their full care history to understand their needs better.
What's New in Blackthumb
1.1.2
July 3, 2026
### Changed - Improved light meter accuracy - Improved light score reading accuracy - UI polish
MoreSubscription plans
Premium Access
Get premium access to all features
FAQ
What is the Light Score Calculator in Blackthumb?
The Light Score Calculator helps you understand the exact amount of usable light your plants receive. By inputting light readings, it calculates the Daily Light Integral (DLI) and rates it against your plant's ideal range, indicating if the light is too low, in range, or too high.
How does Blackthumb help with plant care reminders?
Blackthumb allows you to set reminders for watering, fertilizing, misting, and other care tasks for each plant. It also features sub-reminders, like triggering a fertilizing reminder every third watering, to automate your care routine.
Can I organize my plants by room in Blackthumb?
Yes, Blackthumb lets you organize your plants by specific locations or rooms in your home, such as 'Living Room' or 'Bedroom'. This allows you to view and manage all plants within a particular space at once.
What is the pricing for Blackthumb?
Blackthumb is free to download and start tracking your plants. An optional Premium upgrade is available for unlimited plants, locations, all reminder types, and the Light Score Calculator. Premium Access is $3.99 per month or $29.99 per year, with a 14-day free trial for the annual plan.
What devices does Blackthumb support?
Blackthumb is available on iPhone, iPad, and iPod. It is designed for iOS devices.
How often is Blackthumb updated?
The latest version, 1.1.2, was released on July 3rd, 2026, indicating regular updates. The app was initially released on June 11th, 2026.
What is the age rating for Blackthumb?
Blackthumb has an age rating of 4+, making it suitable for a wide range of users, including younger individuals interested in plant care.
Does Blackthumb have ads?
No, Blackthumb does not contain advertisements. The app offers a free tier and a premium subscription for enhanced features.