5 Best Greg App Alternatives in 2026

Greg is built around watering. Its App Store listing describes a custom watering plan based on each plant’s species, size, and the details of your home, plus a reminder when it’s time to water. There’s a big community side too, with #Communities, a social feed, and “community troubleshooting” where more experienced growers answer plant questions. For plant owners who mainly want help remembering to water, that’s a clear, focused setup.

People look for greg app alternatives for different reasons. Some want more care tasks tracked per plant. Some want an AI diagnosis from a photo, with a treatment plan, when a leaf turns yellow or brown spots show up. Some want a free app with no subscription at all.

The best Greg app alternatives in 2026 are PlantlyAI (best for diagnosing sick plants), Planta (most detailed care schedules), PictureThis (plant ID, diagnosis, and reminders in one app), Blossom (best visual care journal), and PlantNet (completely free species identification). The right pick depends on what you want Greg to do differently.

What Greg Does (and When You Might Want Something Else)

Greg’s watering plan is its core feature. According to its App Store listing, the PlantVision scan identifies the species, measures the pot, and even estimates the distance to the nearest window, and Greg uses those details to work out how much water each plant needs. With a Super Greg subscription, care recommendations also adapt as the weather in your area changes. Its App Store subtitle is “Identify, Diagnose & Reminders”, and plant questions go to community troubleshooting.

Plant care apps tend to lean one of two ways, and knowing which way you need makes choosing a Greg alternative much easier. Scheduler-first apps (Greg, Planta, Blossom) are built around the forgetting problem: watering plans and push notifications before a plant dries out. Diagnosis-first apps like PlantlyAI are built around the recognition problem: you photograph a sick plant and get a likely cause plus a step-by-step treatment plan. Plenty of apps now do some of both. Planta has Dr. Planta for symptoms, Blossom has plant disease ID, and PictureThis pairs diagnosis with watering reminders. The National Gardening Association’s 2021 survey found 18.3 million new American gardeners started gardening in 2020, the largest single-year jump on record, and most arrived without experience recognizing plant disease early. When a plant shows visible damage from pests or root rot, a tool built around diagnosis is the one to reach for first.

Price is the other thing people compare. Greg’s listing says plant scans are free, and a Super Greg subscription ($29.99 a year, with a 7-day trial) unlocks Precision Watering, Smart Watering Reminders, the Indoor Light Gauge, and Seasonal Updates. Greg’s in-app purchases are listed from $1.99 to $39.99. All prices in this article are from the US App Store, checked September 2026; prices vary by region.

The 5 Best Greg App Alternatives in 2026

1. PlantlyAI: Best for Diagnosing Sick Plants

If a plant is showing symptoms you can’t explain, PlantlyAI is the first one to try.

Photograph the problem area (the spotted leaf, the mushy stem, the yellowing tips) and the app returns a diagnosis with a step-by-step treatment plan. Organic options come first: neem oil, adjusting watering frequency, improving drainage. Biological controls follow. Chemical options come last, for more persistent problems. You choose based on what you have available and what you’re comfortable using.

PlantlyAI works across houseplants, garden plants, vegetables, trees, and crops. It also does species ID and has a searchable plant disease library for researching symptoms before problems get worse.

Pricing: 2 free diagnoses per day with no account required to start. A paid plan removes the daily cap. Available on iOS and Android.

Honest limit: no watering reminders, no care schedule. For those features, Greg or Planta still handles that side of things, which is why some plant owners pair a scheduler app with PlantlyAI.

2. Planta: Most Detailed Care Schedules

Planta is the closest match to what Greg does: a care scheduler at heart, with a longer list of task types.

Its App Store listing names personalized schedules for watering, fertilizing, repotting, pruning, misting, and more, and its Google Play listing adds cleaning and overwintering. Reminders adapt to your home environment, local weather, and plant type. There’s a built-in light meter for finding the right spot for each plant, a plant journal, Care Share for handing tasks to family or friends while you’re away, and a community. For plant problems, Dr. Planta analyzes symptoms like yellow leaves, brown spots, pests, or slow growth and guides you through treatment recommendations.

Planta’s help center says the app is free to use with limited access, while plant identification, care schedules other than watering, Dr. Planta, the light meter, and plant recommendations need Premium.

Pricing: Premium is listed at $7.99 to $9.99 for 1 month, $17.99 to $19.99 for 3 months, and $17.99 to $47.99 for 12 months, with a free trial shown. iOS and Android.

3. PictureThis: Plant ID, Diagnosis, and Reminders in One App

PictureThis says it can identify over 400,000 plant species. If naming plants you come across is your main need, it has a lot of coverage.

It also diagnoses sick plants: take a photo and, per its listing, you get a diagnosis and a step-by-step treatment plan. Add care tips, watering reminders, a light meter, toxic-plant warnings, weed ID, and “chat with our experts 24/7”, and it overlaps with a good part of Greg’s feature set.

Pricing: Free to download. In-app purchases for PictureThis Pro and a Family Plan are listed from $3.99 to $49.99, and the listing shows a free trial. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. iOS and Android.

4. Blossom: Best Visual Care Journal

Blossom’s Notes feature lets you journal each plant’s life, describe your care routine, and attach photos to see how a plant has changed over time. Plant collections can be grouped by room, with a wishlist for plants you’re planning to grow. If you like tracking progress visually, that’s the draw.

Care reminders cover watering, fertilizing, and repotting, and a water calculator gives watering recommendations based on plant type and pot size. Blossom also has plant disease ID: snap a photo and it gives you details on the disease, what caused it, how to treat it, and how to prevent it. Its listing says it identifies more than 30,000 plants.

Pricing: Blossom Premium is listed from $5.99 (1 month) to $79.99 (1 year), plus a weekly bundle with a free trial. iOS and Android.

5. PlantNet: Completely Free Species Identification

PlantNet (written Pl@ntNet) is a citizen-science project, and its trademark is owned by French research institutions CIRAD, INRAE, INRIA, and IRD. You use it at no cost, with no in-app purchases and no subscription.

Photograph a leaf, flower, or fruit and it matches against tens of thousands of species. Your observations are reviewed by the community and help scientists study plant biodiversity. In 2026 it also added a Diseases & Pests feature, focused first on key crops in France.

PlantNet is built for identification and citizen science. If you’re leaving Greg to escape subscriptions and mainly need to name plants, it covers that cleanly.

Pricing: Fully free. iOS, Android, and web.

Which Alternative Fits Your Situation

The fastest way to choose is to name what you want Greg to do differently.

A plant is sick or showing visible symptoms: Download PlantlyAI first. AI photo diagnosis with a treatment plan is what it’s built for, and 2 free scans per day covers most plant owners without spending anything.

You want more detailed care schedules: Planta’s listing names more care task types than Greg’s, from fertilizing and misting to pruning and repotting, plus a built-in light meter.

You need plant ID alongside care reminders: PictureThis handles identification, diagnosis, and watering reminders in one app.

You want a visual plant journal: Blossom’s Notes and photo journal are built for tracking plants over time, and it has care reminders too.

You want free species ID with no subscription: PlantNet covers that without a paywall of any kind.

Some plant owners run 2 apps side by side: a scheduler for routine care and a diagnosis app for when something looks wrong. Others prefer one app that does a bit of both. Pick based on the job you need done most often.

How PlantlyAI Works Alongside Greg

Greg can remind you to water on schedule. PlantlyAI is built for the moment a plant looks wrong and you want an AI diagnosis with a treatment plan.

Open the app, aim the camera at the problem area (the leaf with spots, the stem going soft, the yellowing base leaves), and scan. Photographing just the affected part rather than the whole plant gives the AI more useful information to work from.

The diagnosis comes back with the most likely cause and a ranked treatment plan. Organic options appear first: adjusting watering frequency, improving drainage, applying neem oil or insecticidal soap. Biological controls follow. Chemical options come last, for more persistent or widespread problems. You choose the approach that fits what you have on hand and what you’re comfortable applying.

The plant disease library works as a reference even before problems appear. Search “root rot” or “powdery mildew” and you get symptom photos, explanations of how the problem spreads, and prevention steps. Knowing what to look for means catching issues early, before they’re difficult to treat.

2 free scans per day covers most plant owners for regular checks. Dealing with a serious outbreak across multiple plants? The paid plan removes the daily cap.

For a broader look at plant health apps, the best houseplant disease diagnosis apps covers the main options across different use cases.

Frequently Asked Questions

Is the Greg app free?

Greg is free to download, and its App Store listing says plant scans are free. A Super Greg subscription, listed at $29.99 a year on the US App Store with a 7-day trial, unlocks Precision Watering, Smart Watering Reminders, the Indoor Light Gauge, and Seasonal Updates. The subscription renews automatically unless you turn off auto-renew at least 24 hours before a new period starts.

Does Greg have plant disease diagnosis?

Greg’s App Store subtitle is “Identify, Diagnose & Reminders”, and its listing describes community troubleshooting, where more experienced growers answer your plant questions. If you want an AI diagnosis from a photo with a step-by-step treatment plan, PlantlyAI is built for that and works alongside Greg for the reminder side.

What’s the best Greg alternative for a sick plant?

PlantlyAI is the most focused alternative for plant health problems. Photograph the affected area and it returns a diagnosis with a step-by-step treatment plan covering organic, biological, and chemical options. 2 free diagnoses are available daily with no account required to start.

Is Planta better than Greg?

It depends on what you need. Planta’s listing names more care task types (watering, fertilizing, repotting, pruning, misting, and more), plus a built-in light meter, a plant journal, and Dr. Planta for plant symptoms. Greg centers on a personalized watering plan and a large community, and its Super Greg tier includes an Indoor Light Gauge. For the widest range of care reminders, Planta has the edge.

What’s a completely free alternative to Greg?

PlantNet is fully free with no in-app purchases or subscription. It identifies plants from photos, and in 2026 it added a Diseases & Pests feature focused first on key crops in France. If you only need plant ID, Greg’s own listing also says its plant scans are free.

If a plant is showing symptoms you can’t place, scan it in PlantlyAI. Photograph the affected area and you’ll have a diagnosis and treatment plan in under a minute. The first 2 scans are free with no account needed. Available on iOS and Android.