Taller Ninja: Grow Taller

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About this app

Most "grow taller" apps sell hope in a bottle. Taller Ninja doesn't.

We're the honest habit app for teens: real posture and stretching exercises, real sleep and nutrition guidance, and a fair, science-based height estimate — with zero miracle claims and zero supplements to buy.

WHAT IT IS
Taller Ninja is a daily habit coach for teens going through puberty. Short guided workouts, simple food and sleep tips, and a friendly AI Ninja Coach turn "eat better, sleep more, stand tall" into something you actually do every day — gamified like a martial-arts journey, not a diet app.

KEY FEATURES
• 100 posture, stretching, core and active exercises, each with clear step-by-step instructions, its own illustrated figure and a built-in countdown timer — and 49 of them animate
• A 30-day guided program that builds week by week, from beginner moves to a full daily routine
• Belt system (white to black, seven belts), streaks with a monthly freeze, and badges to unlock as you build consistency
• Ninja Coach: an AI chat coach for quick questions about posture, sleep, food or exercise — trained to stay on-topic and never give medical advice
• A sleep log: two taps to record how long you slept, and a chart of your week. Sleep is the strongest lever you have during your growing years, so we measure it instead of asking you to tick a box — no streak to break, no red numbers, no telling you off for one bad night
• A water counter: tap a glass when you drink one. Hydration only — nothing weighed, nothing counted about food
• A weekly recap every Sunday: your seven days, your XP and belt, the trainings you did and your latest measurement — an honest look at how the week actually went
• Nutrition guidance built around real food (protein, calcium, vitamin D, zinc, iron, hydration) with meal ideas for breakfast, lunch, snacks and dinner — this is a habit tracker, not a calorie counter, and we will never add food logging or weight tracking
• An honest height estimate using the mid-parental (Tanner) method — the same estimate range doctors use — always shown clearly as an estimate, never a promise
• Six languages: English, Dutch, Brazilian Portuguese, Latin American Spanish, Hindi and Indonesian, switchable any time in Settings
• Privacy-first: your data lives on your device by default; creating an account is optional and only needed if you want cloud backup

THE HONESTY MANIFESTO
We built Taller Ninja because most "height growth" content online is exaggerated, commercial, or aimed at teenage insecurity. So we made three promises to ourselves:
• No false promises. We will never claim a number of centimeters or guarantee height growth. Genetics set your range; habits help you reach it. Good posture makes you look taller today — that part is real, and it is the only "taller" we sell.
• No supplements. We don't sell pills, powders or "growth" products, and we never will.
• No data selling. We don't sell your data or serve ads. Your information is yours.

Not medical advice. Taller Ninja provides general lifestyle information about posture, sleep, activity and nutrition. It does not diagnose, treat or replace a doctor. If you have concerns about your growth, health or development, please talk to a doctor or another trusted adult.

WHO IT'S FOR
Teens aged 13 and up who want better posture, more energy and honest daily habits during their growing years — and the parents who'd rather their kid use something truthful than another app promising miracles.

What’s new

Taller Ninja now speaks Hindi and Indonesian, alongside English, Dutch, Portuguese and Spanish.

On shorter phones the timer ring slid under Pause and Skip during a workout. It fits now, and long exercise names shrink instead of pushing everything down.

Dates read as dates instead of 2026-09-12. Five exercises that borrowed another exercise's drawing have their own. And a few labels that were cut off in some languages are whole again.