Greg is one of the most popular free plant-care apps, and for good reason: its generous free tier, community forum and adaptive watering algorithm have earned it a loyal following. But it isn't the right fit for everyone. If you want deeper diagnosis, a real back-and-forth about your specific plant, verified pet-safety data or UK-calibrated care, it's worth looking at the alternatives.
Growli built one of the apps on this list, so we have skin in the game — but every entry below names where a competitor wins. The goal is to leave you with an app you actually use, not a sales pitch.
First, what Greg does well
Greg's core promise is a personalized watering schedule that adapts over time. When you add a plant, Greg factors in your location, light conditions, pot size and material, then draws on how the wider Greg community waters the same species in similar climates. Feed it your own watering feedback and the schedule adjusts.
Its two biggest strengths are that it's genuinely free for the core experience — unlimited plant tracking and community care advice — and that it has an active in-app community where veteran growers answer questions, often within minutes. Premium ("Super Greg") is roughly $29.99 a year and mainly unlocks watering and fertilizing reminders, detailed care logs and custom notes.
The honest limits: the watering-reminder notifications sit behind the paywall, community answers are peer advice rather than verified horticulture, and Greg leans toward small-to-medium indoor collections rather than diagnosis, edibles or region-specific outdoor gardening.
The best Greg alternatives at a glance
| App | Best for | Price | Platforms |
|---|---|---|---|
| Growli | Conversational AI care + diagnosis + pet safety | Free | iOS, Android |
| Greg | Free community + adaptive watering | Free; premium ~$30/yr | iOS, Android |
| PictureThis | Fast, accurate plant ID | ~$30–40/yr; thin free tier | iOS, Android |
| Planta | Detailed watering schedules + light meter | ~$36/yr; most features paid | iOS, Android |
| Blossom | Budget all-rounder | Low-cost subscription | iOS, Android |
| Plantum | Large ID library + disease checks | ~$30/yr; limited free tier | iOS, Android |
Prices are app-store estimates for 2026 and vary by region, promotion and platform — always confirm the current price in the store before subscribing, and watch for free trials that auto-renew.
1. Growli — best for conversational AI care and diagnosis
Growli is an AI plant-care assistant built around three things Greg doesn't do: a conversation about your specific plant, leaf-based photo diagnosis, and verified pet-safety data. Snap a photo to identify a plant from a library of roughly 11,700 species, then keep chatting — ask why the lower leaves are yellowing, what a spotted leaf means, or how to space out feeding. You also get care reminders, a daily plan and frost alerts.
Two things make it stand out for a Greg switcher. First, it's UK-localized, drawing on RHS guidance rather than assuming US conditions. Second, pet-safety flags are cited against the ASPCA toxicity database instead of vague "may be harmful" labels — useful if you have a cat or dog. Growli is free on iOS and Android, rated 4.6 on the App Store with 7,000+ growers.
- Pros: conversational AI, photo diagnosis, ASPCA-cited pet safety, RHS/UK support, free.
- Cons: newer than Greg, so its community is smaller; it isn't a moon-phase or dedicated vegetable-planner app.
For a wider head-to-head, see our best plant care app guide and the broader best gardening app roundup.
2. PictureThis — best for fast, accurate identification
PictureThis is the strongest pure identifier on this list. Point it at almost any plant and it returns a confident match, plus care notes and disease detection. If your main frustration with Greg is identification accuracy, this is the upgrade.
The catch is the paywall. The free tier is thin — a small number of daily identifications — and full care features, reminders and disease detection require a subscription (roughly $30–40 a year), often after a 7-day trial that auto-renews. Many app-store reviews flag surprise charges, so cancel before the trial ends if you're only testing it. For a deeper look, see our best plant identifier app comparison.
- Pros: excellent ID accuracy, strong care encyclopedia.
- Cons: limited free tier, auto-renewing trial, no community.
3. Planta — best for detailed watering schedules
Planta is the closest to Greg's watering focus, but more polished and data-driven. Its algorithm weighs 30-plus parameters plus local climate and weather to time each watering, and premium adds a light meter, disease diagnosis and step-by-step repotting and seasonal guides.
The trade-off is cost and access: most of the useful features — including plant identification and custom schedules — sit behind a subscription of around $36 a year, so the free experience is limited compared with Greg's.
- Pros: meticulous scheduling, light meter, polished design.
- Cons: most features are paywalled; pricier than Greg's premium.
4. Blossom — best budget all-rounder
Blossom bundles identification, disease checks, a light meter, journaling and an AI botanist chat into one of the more affordable subscriptions in the category. It's a reasonable pick if you want more than Greg's free tier without paying PictureThis or Planta prices.
Be aware the free tier is very restricted — only a couple of reminders and a handful of identifications before you hit the paywall — so Blossom really assumes you'll subscribe.
- Pros: low price, broad feature set, AI chat.
- Cons: minimal free tier; less established community than Greg.
5. Plantum — best for a large ID library
Plantum (formerly NatureID) identifies a very large species library — its makers cite 40,000-plus plants — and layers on disease diagnosis, a light meter, pot meter, water calculator and paid access to real botanists. It's free to install with unlimited identifications, but health diagnoses and most care tools require premium, at roughly $30 a year after a short trial.
- Pros: huge ID library, disease checks, expert consultations available.
- Cons: health features and care tools are largely paid.
How to choose
If Greg's free community and watering algorithm already work for you, there's no reason to leave. Switch when you need something Greg doesn't offer: Growli for a real conversation about your plant, photo diagnosis, ASPCA-cited pet safety and UK/RHS support; PictureThis for the sharpest identification; Planta for the most granular schedules; Blossom for value; Plantum for the widest ID net.
Still deciding? Open Growli, photograph a plant, and start a conversation — identification, a care plan and pet-safety flags in about 60 seconds. You can also browse the free plant care library or check the pet-safe plant guide before you commit to any app.
Whichever app you choose, the best plant-care tool is the one you'll open every week. Greg earns its popularity — but if you want a conversation about your plant, honest diagnosis, verified pet safety or UK-native care, one of the alternatives above will serve you better.
Frequently asked questions
Is the Greg app free?
Yes — Greg's core experience is free, including unlimited plant tracking, its adaptive watering algorithm and access to the community forum. A paid tier called Super Greg (around $29.99 a year, with a lifetime option) unlocks watering and fertilizing reminder notifications, detailed care logs and custom notes. In other words, planning is free but the actual reminders are premium.
Is there a better app than Greg?
There's no single 'better' app — it depends on what you need. Greg is hard to beat for a free community and watering schedule. Growli is stronger if you want conversational AI care, photo-based diagnosis, ASPCA-cited pet safety and UK support, and it's also free. PictureThis wins on identification accuracy, and Planta on detailed scheduling. Match the app to the job you do most.
What app is like Greg but with plant identification?
Growli, PictureThis and Plantum all combine care features with photo identification. Growli adds conversational follow-up and leaf-based diagnosis from a library of roughly 11,700 species and is free. PictureThis is the most accurate pure identifier but paywalls most care features. Plantum offers a very large ID library. Greg does include identification too, but ID isn't its main strength.
What is the best free alternative to Greg?
Growli is the most capable fully free alternative: free on iOS and Android, with AI plant identification, conversational care advice, leaf diagnosis, reminders, frost alerts and pet-safety data at no cost. Most other alternatives — PictureThis, Planta, Blossom and Plantum — put their core features behind a subscription after a limited free tier or trial.
Does Growli have a community like Greg?
Not in the same way. Greg's advantage is its established in-app community forum where veteran growers answer questions. Growli takes a different approach: instead of waiting for a peer reply, you chat directly with an AI assistant about your specific plant and get an instant, cited answer, including pet-safety flags checked against the ASPCA database. If a busy human community matters most to you, Greg is the better fit.
Which plant app is best for UK gardeners?
Most plant apps, including Greg, lean toward US conditions, which means UK gardeners mentally convert USDA zones and US frost dates. Growli is UK-localized, drawing on RHS guidance and UK-calibrated care, so advice fits British growing conditions out of the box. It's free on iOS and Android, making it an easy first install for UK plant owners.