PictureThis, Planta, and PlantGrail - AI Plant Scanner represent three useful plant-app strategies: a broad identification suite, a schedule-led collection manager, and a scan-first plant health check with follow-up questions.
Disclosure: PlantGrail publishes this comparison and makes PlantGrail - AI Plant Scanner. We have not run a controlled accuracy test. Features and US prices were checked against the official App Store listings on October 15, 2026. Offers differ by country, device, and date.
One-sentence verdict
- PictureThis: choose it for broad identification, diagnosis, care utilities, and expert access.
- Planta: choose it for personalized schedules, reminders, journaling, light guidance, and community.
- PlantGrail: choose it when a plant has changed and you want a focused scan, follow-up questions about the result, and a check-in to see whether it recovers.
Side-by-side comparison
| Category | PictureThis | Planta | PlantGrail - AI Plant Scanner |
|---|---|---|---|
| Core position | Identification-led all-in-one suite | Schedule-led collection care | Scan-first plant health checks |
| Identification | Yes | Yes | Yes |
| Diagnosis | Yes | Dr. Planta | Yes, plus leaf, soil, and light scan modes |
| Asking questions | Chat with human experts | Ask the community | Follow-up questions about each scan result and the plant’s history: 3 free per result, 100 per month with Premium |
| Reminders and calendar | Yes | Yes (core feature) | Care calendar and optional reminders |
| Light tool | Yes | Yes | Light-suitability scan |
| Collection | Collection tools | Journal and care sharing | My Garden with health history |
| Community | Not the core proposition | Yes | No |
| Free use | Free download; paid offers | Free download; premium offers | 3 free AI scans that do not expire |
| Platforms | iOS and Android | iOS and Android | iPhone |
Price comparison
These are the in-app purchases each US App Store listing showed on October 15, 2026. Apple’s listing does not always say which prices are introductory offers, so check the purchase sheet on your device before subscribing.
| App | Free use | Trial | Listed subscription prices |
|---|---|---|---|
| PlantGrail - AI Plant Scanner | 3 free AI scans, no expiry | 7-day free trial on Premium plans | Premium $7.99/month or $39.99/year |
| PictureThis | Limited free use | Offered in the purchase flow | PictureThis Pro listed at $3.99, $7.99, and $39.99; Family Plan $49.99 |
| Planta | Limited free use | Offered in the purchase flow | Premium listed at $7.99–$9.99 for 1 month, $17.99–$19.99 for 3 months, and $17.99–$47.99 for 12 months |
PlantGrail Premium adds unlimited scans, 100 follow-up questions per calendar month, and the premium garden and care tools. It renews automatically unless you cancel it in your Apple ID subscription settings.
Never compare a weekly or introductory offer with an annual renewal as if they were the same unit. Divide by the number of months, and check whether the renewal price differs from the first payment.
PictureThis: breadth and identification
PictureThis is the broadest identification-led option in this comparison. Its listing includes photo diagnosis, treatment guidance, reminders, a light meter, toxicity and weed warnings, collection tools, and expert consultation.
Pick it when you routinely encounter unknown plants and want many related services in one app. The tradeoffs are subscription cost and the privacy categories disclosed in the Apple listing.
Planta: routines and collection memory
Planta organizes personalized schedules, reminders, identification, Dr. Planta diagnosis, a light meter, a journal, Care Share, and community.
Pick it when missed or poorly timed care is the recurring problem. Its history and schedule can be more valuable than another single diagnosis because they show what happened before the symptom appeared.
PlantGrail: focused scans and follow-up
PlantGrail - AI Plant Scanner has six scan modes: diagnose visible problems, identify a plant, examine leaves for stress, review soil, check light suitability, and ask a plant-care question. You can start scanning without setting anything up first.
After a result you can ask follow-up questions about the scan and the plant’s saved history, add an optional seven-day check-in, and keep the plant in My Garden to follow its health over time. A care calendar and optional reminders cover routine care.
Most plant apps send your questions to human experts or a community. PlantGrail’s follow-up questions are about your specific result and the plant’s saved history, and you get an answer in the app without waiting for a person.
Pick it when a plant has changed and you want to work through the problem and follow its recovery. It is newer than PictureThis and Planta, iPhone-only, and has no community feature.
Which is best for yellow leaves?
All three can contribute, but the useful answer depends on evidence. Yellowing of one old leaf is different from yellow new growth, wet-soil yellowing, interveinal chlorosis, or a plant with damaged roots.
PlantGrail’s diagnosis and leaf scans, plus follow-up questions, fit the immediate investigation. PictureThis provides diagnosis inside a broad suite. Planta can combine diagnosis with care history. No app should recommend watering or fertilizer until moisture, roots, light, leaf age, and recent care are considered.
Which is best for a large collection?
All three keep a collection. Planta builds everything around personalized schedules, with a journal, Care Share, and community on top. PictureThis has collection and reminder tools inside a broad suite. PlantGrail’s My Garden, care calendar, and reminders connect each plant to its scan results, follow-up questions, and check-ins, which suits collections where plant health is the main concern.
Which is best for identification?
PictureThis is the strongest established identification-led choice here. Planta and PlantGrail include identification, but it is not their sole proposition. For a fully free identification specialist, consider PlantNet.
Which has the best free option?
The models differ too much for a single answer:
- PlantGrail includes three free AI scans that do not expire, and each result includes three free follow-up questions.
- PictureThis and Planta are free downloads with premium offers; current limits can change.
- PlantNet is free for identification but does not replace diagnosis or care scheduling.
- PlantGrail’s web plant doctor is free and does not require login or a download.
Privacy comparison
PictureThis and Planta both disclose tracking and linked-data categories in their Apple privacy sections. PlantGrail’s label lists data linked to you (purchases, coarse location, photos and other user content, device ID, and product interaction) for app functionality and personalization, and lists no data used to track you.
Apple says privacy labels are supplied by developers and are not verified by Apple. Use them to ask better questions, not as a certification.
Frequently asked questions
Is PictureThis better than Planta?
PictureThis is the better fit for identification-led breadth. Planta is the better fit for personalized schedules and collection routines. Neither is universally better.
Is PlantGrail better than both?
No universal claim is justified. PlantGrail is narrower and newer. Its advantage is the scan-first problem workflow with follow-up questions and check-ins, while PictureThis and Planta offer mature features PlantGrail does not, such as community and Android apps.
How much does PlantGrail Premium cost?
On October 15, 2026, the US App Store listed PlantGrail Premium at $7.99 per month or $39.99 per year, with a 7-day free trial on both plans. Every download includes three free AI scans.
Can I use two of these apps?
Yes, when the jobs are distinct. A schedule app plus a diagnosis tool can make sense. Paying for two overlapping all-in-one suites usually does not.
Which app should a beginner choose?
Choose based on the beginner’s failure mode. If they forget care, Planta is a natural fit. If they constantly bring home unknown plants, PictureThis fits. If they panic when one plant changes, PlantGrail’s guided scan and follow-up questions may be easier to use.
Final choice
Choose PictureThis for broad identification and care, Planta for collection routines, and PlantGrail for focused problem investigation. The best app is the one that improves the next plant-care decision without pretending one image can replace observation.