ftns.ai vs Plant Nanny: A Fitness Habit Game vs a Plant-Growing Water Tracker

Wondering whether Plant Nanny is worth it, or looking for an alternative? Here is the short Plant Nanny review: if you want a cute, simple way to remember to log water, Plant Nanny is built for exactly that and is a lovely pick. If you want one private game about showing up for your whole fitness routine — workouts, walks, rest days, sleep and food — ftns.ai, a fitness habit game, may fit better. Plenty of people could use both.

Plant Nanny belongs to a family of apps where you look after something by looking after yourself. We mapped that family in our guide to care-loop apps for adults and compared ftns.ai with one of its best-known members, Finch. Plant Nanny is built around a single habit, so it gets its own look.

What is the Plant Nanny app?

Plant Nanny is a free-to-download water tracker built as a plant-growing game: each time you log a glass of water, you water a cartoon plant too, and over time you grow and collect a garden.

It is made by SPARKFUL, the Taiwan-based studio formerly called Fourdesire. The current app first launched as Plant Nanny² in 2019 and is now listed simply as Plant Nanny.

Plants come in three difficulty levels, with special pots, greenhouses and mystery creatures to collect. You can schedule reminders, see daily, weekly and monthly charts of your logs, and add a home-screen widget on iPhone. It suggests a daily goal from details you enter, and its App Store listing says it syncs water data with Apple Health.

It runs on iPhone, iPad and Android. The App Store also lists an Apple Watch app, but SPARKFUL’s help center says you log on your phone.

What Plant Nanny is genuinely good at

• It is genuinely cute: buddy characters, personalities, dialogue bubbles and limited-edition plants, many of them part of the paid plan.
• It keeps one thing simple, and that loop is free: tap to log a glass and your plant gets watered.
• It works on iPhone and Android, and on iPhone it adds a home-screen widget and Apple Health sync.
• It is long-running and well rated: 4.7 stars from about 107K ratings on the US App Store, and 4.7 stars from about 181K reviews on Google Play (both checked 26 October 2026).

Is Plant Nanny free? What does the subscription add?

Plant Nanny is free to download and play. An optional SPARKFUL subscription unlocks extra plants and customisation and removes ads, apart from the optional reward ads you choose to watch, and the same subscription covers SPARKFUL’s other apps.

Both stores list the app as containing ads and in-app purchases. Clovers are the in-game currency: you earn them from achievements, medals and daily logins, can get some by choosing to watch an ad, or can buy them.

The subscription adds dozens of extra plants; all buddies, personalities and dialogue bubbles; plant names in your greenhouse; a custom daily goal and bedtime; all alert sounds; and a premium iPhone widget. It also covers Walkr, Fortune City, To-Do Adventure and Book Morning!, using one SPARKFUL ID across apps and devices.

Several plans are offered, including monthly and annual. The price is shown in the app before you subscribe, and it varies by country. A free trial is offered to first-time subscribers; the length depends on the plan. If a subscription ends, the plants you grew and the rewards you earned are kept.

How do you cancel Plant Nanny?

Cancel where you subscribed. Deleting the app does not stop payments, and access lasts to the end of the period you paid for.

On iPhone, Apple’s steps are:

1. In Settings, tap your name.
2. Tap Subscriptions.
3. Tap the SPARKFUL subscription.
4. Tap Cancel Subscription.

On Android, Google Play’s steps are:

1. Open your subscriptions in Google Play.
2. Select the SPARKFUL subscription.
3. Tap Cancel subscription and follow the instructions.

Is Plant Nanny worth it?

It is worth it if a cute plant is what makes logging water stick for you, and the free version is enough to find out. If your real goal is one game for your whole fitness habit, it covers only the water part.

It is a water-logging game, not health advice. Questions about how much you should drink are for a qualified health professional, not an app.

What ftns.ai is for

ftns.ai is a fitness habit game for iPhone with one job: helping you keep showing up. Your twin, a living 3D avatar of you, reacts when you log and rebuilds weekly from what you actually tracked, so one quiet day doesn’t swing it. It is not a body scan; here is what a digital twin is.

One Life Score, 0 to 100, comes from six categories: Nutrition, Training, Recovery, Sleep, Mood and Consistency. You log by hand or let Apple Health fill it in. Water is one of the things you can log, alongside workouts, meals, sleep and mood: one input among many, which is the key contrast with a single-habit app.

Your coach builds a workout plan when you ask, from your goal, pace, equipment and the exercises you rule out. Offered, never imposed: a finished plan waits in the coach inbox until you choose to add it. Your coach is a game feature, not a health professional.

Missed days slow your progress; they never punish you. Rest isn’t a miss. XP never decreases. Ever. More on that in is it okay to miss a day.

It is also private. No social feed, no friends list, no leaderboards, and your logs and twin live on your phone. More in why there is no social side.

ftns.ai vs Plant Nanny at a glance

Plant Nanny details from the SPARKFUL website and help center and its US App Store and Google Play listings, checked 26 October 2026.

Who should pick which

• Pick Plant Nanny if water is the habit you want to build, you like cute collecting games, or you want something free to start. It is also the pick on Android, or if you want a home-screen widget on iPhone.
• Pick ftns.ai if you want one game for your whole fitness routine, rest days that count instead of costing you, a coach who builds a workout plan when you ask, and something private.
• Use both if you want Plant Nanny for the water habit and ftns.ai to keep the wider fitness habit visible. Both work with Apple Health on iPhone; the two apps don’t connect to each other directly.

Comparing other character games built around one part of your day? See ftns.ai vs Pokémon Sleep and ftns.ai vs Zombies, Run!, or our Fabulous comparison for a routine-building app.

A Plant Nanny alternative for your whole fitness habit

If you want one private game that reflects showing up for any kind of training, a fitness habit game fits better than a single-habit plant game.

If that sounds like you, try ftns.ai on iPhone. It is a paid iPhone membership, free for 7 days, then $14.99/mo or $167.99/yr, so you can see whether showing up for your twin sticks before you pay.

One app grows a plant every time you log a drink. The other just wants you back tomorrow.