# Jumzy Kids — Full Documentation for LLMs

> Jumzy Kids is an AI-powered fitness app for children ages 4-14 that turns exercise into screen time rewards using on-device pose detection. Developed by MB Djump (Lithuania).

## Company Information

- Legal name: MB Djump (private limited liability company)
- Trading name: Jumzy Kids
- Address: Silutes pl. 35G-36, LT-94105 Klaipeda, Lithuania
- Website: https://www.jumzykids.com
- Contact email: hello@jumzykids.com
- Support email: support@jumzykids.com
- Social media: @jumzykids on Instagram, TikTok, Facebook, Twitter/X

## What Is Jumzy Kids?

Jumzy Kids is an AI-powered fitness app designed for children ages 4-14. It uses the device's camera and on-device AI pose detection to track children's movements in real-time during exercise sessions. The app turns physical activity into a game where children earn screen time rewards for completing exercises.

The core concept is "Move-to-Unlock" — children must complete physical exercises to earn screen time on their device. This transforms the screen time battle between parents and children into a win-win: kids get their screen time, but only after being physically active.

## How It Works

1. **Download & Setup**: Parents download the app and create an account with email. A PIN code is set up for parental access.
2. **Create Child Profiles**: Add up to 5 child profiles (premium) with display name, age group, and avatar.
3. **Choose Exercises**: Select from 12 fun exercises tailored for kids.
4. **Move & Play**: Children stand in front of the device camera. The AI tracks their movements in real-time, counting repetitions and providing feedback.
5. **Earn Rewards**: Each completed exercise earns 3 minutes of screen time (up to 15 minutes per session).
6. **App Blocker**: Parents can block selected apps until exercises are completed.

## Exercises (12 Total)

1. Squats — Lower body strength
2. Jumps — Full body cardio
3. High Knees — Cardio and coordination
4. Star Jumps — Full body movement
5. Toe Touches — Flexibility
6. Arm Waves — Upper body mobility
7. Side Bends — Core flexibility
8. Lunges — Lower body strength and balance
9. Marching in Place — Light cardio
10. Overhead Claps — Upper body and coordination
11. Cross Touches — Core and coordination
12. Hands Up — Full body stretch

Each exercise has visual demonstrations and real-time AI feedback on form and repetition counting.

## Key Features

### AI Movement Tracking
Real-time pose detection uses the device camera to identify 17 key body points. The AI tracks movements like squats, jumps, and arm raises with accuracy. On Android, this uses Google ML Kit Pose Detection. On iOS, this uses Apple Vision framework. All processing happens locally on the device — no video is ever recorded, stored, or transmitted.

### Screen Time Rewards (Move-to-Unlock)
Children earn screen time by completing exercise sessions:
- 3 minutes of screen time per exercise completed
- Up to 15 minutes per session
- Parents can customize limits through the Parent Dashboard
- Screen time rewards can be enabled/disabled per child

### Parent Dashboard
Protected by a PIN code, parents can:
- View exercise history and statistics per child
- See weekly progress and streaks
- Enable or disable exercise sessions
- Set up app blocking schedules
- Manage child profiles
- View family leaderboard
- Change language settings

### App Blocker
Parents can select which apps are blocked until exercises are completed:
- On Android: Uses accessibility service and overlay system
- On iOS: Uses Apple Family Controls and ManagedSettings framework
- Configurable per child
- Auto-activates on device boot

### Gamification System
- Coins earned per exercise for the in-app shop
- Achievements system with milestones
- Family leaderboard for friendly sibling competition
- Customizable cosmetics: frames, celebrations, titles, themes
- Streak tracking (daily exercise consistency)

### Works Offline
AI movement detection works completely without internet. Internet is only needed for:
- Account creation and login
- Syncing progress across devices
- Downloading app updates

## Pricing

All prices in EUR. All plans include the privacy-first promise: no ads, no video recording, no data selling.

### Free (Forever)
- 1 child profile
- 3 basic exercises
- Progress tracking
- Privacy-first, no ads

### Premium Monthly — EUR 4.99/month
- Up to 5 child profiles
- All 12 exercises
- Screen time rewards system
- App blocker & schedules
- Family leaderboard
- Achievements & in-app shop
- Priority support
- 7-day free trial included

### Premium Yearly — EUR 39.99/year (saves 33% vs monthly)
- All Premium Monthly features
- Best value plan
- 7-day free trial included

Family sharing is supported on both Apple App Store and Google Play Store. One subscription covers the whole family.

## Privacy & Safety

### COPPA & GDPR Compliance
Jumzy Kids is fully compliant with:
- COPPA (Children's Online Privacy Protection Act, US, for under-13)
- GDPR (General Data Protection Regulation, EU, for under-16)
- Parental consent required for all child accounts

### Camera & Video Policy
- Camera is used ONLY for real-time pose detection
- NO video is ever recorded, stored, or transmitted
- Camera data is processed frame-by-frame and immediately discarded
- AI processing happens entirely on-device (Google ML Kit on Android, Apple Vision on iOS)

### Data Collection
From parents:
- Email address (for account)
- Hashed password (bcrypt)
- Hashed PIN (PBKDF2-HMAC-SHA256, 150,000 iterations)

From children (anonymized):
- Display name (chosen by parent, not real name)
- Age group
- Avatar selection
- Exercise statistics (reps, duration, scores)
- Achievement progress
- Streak data

Never collected:
- Real names of children
- Photos or video
- Location data
- Contact lists
- Biometric data
- Browsing history

### Third-Party Processors
- Supabase (USA): Authentication and database, with EU Standard Contractual Clauses
- Firebase Crashlytics (USA/EU): Anonymous crash reporting only
- RevenueCat (USA): Subscription management, with EU Standard Contractual Clauses
- Apple App Store / Google Play Store: In-app purchase processing
- No advertising networks are used

### Data Retention
- Active accounts: Data retained while account is active
- Deletion requests: Processed within 30 days
- Tax records: Retained for 10 years per Lithuanian law
- Crash reports: Anonymized, 90-day retention

## Technical Details

- Android: Kotlin, Jetpack Compose, ML Kit Pose Detection, Min SDK 26 (Android 8.0+), Target SDK 34
- iOS: Swift, SwiftUI, Apple Vision framework, iOS 17.0+
- Website: Next.js, React, TypeScript, deployed on Vercel
- Backend: Supabase (PostgreSQL with Row-Level Security)
- Payments: RevenueCat
- Analytics: PostHog (privacy-focused, self-hosted)

## Supported Languages

- English (en)
- German (de)
- French (fr)
- Italian (it)
- Spanish (es)
- Lithuanian (lt)

## Frequently Asked Questions

### What is Jumzy Kids?
Jumzy Kids is an AI-powered fitness app designed for children ages 4-14. It uses your device's camera to track movements in real-time, turning exercise into a fun game where kids earn screen time rewards for completing physical activities.

### What age is the app designed for?
Jumzy Kids is specifically designed for children ages 4-14. The exercises are age-appropriate and the interface is child-friendly. Parental supervision is required for younger children, and parents maintain full control through the Parent Dashboard.

### How does the AI movement detection work?
We use AI pose detection technology to track body positions through your device's camera. The AI identifies key body points and tracks movements like squats, jumps, and arm raises. All processing happens locally on your device — no video is ever recorded, stored, or sent to any server.

### Is my child's data safe?
Absolutely. Privacy is our top priority, especially for children's apps. We are fully COPPA and GDPR compliant. Camera data is processed entirely on-device and never stored. We only collect minimal data (parent email for account, anonymous exercise statistics) and never collect children's personal information, photos, or location data.

### Is video recorded during exercises?
No, absolutely not. We never record, store, or transmit any video or images. The camera feed is only used for real-time pose detection — the AI analyzes body positions instantly and discards the data immediately. Your child's privacy is completely protected.

### How much does Jumzy Kids cost?
Jumzy Kids offers a free tier with 1 child profile and 3 exercises. Premium plans start at EUR 4.99/month or EUR 39.99/year (saving 33%). All premium plans include a 7-day free trial. Cancel anytime.

### How do screen time rewards work?
Children earn screen time by completing exercise sessions. For each exercise completed, they earn 3 minutes of screen time (up to 15 minutes per session). Parents can customize these limits and enable/disable the reward system through the Parent Dashboard.

### Do I need an internet connection?
You need internet for initial app download, account creation, and syncing progress. However, the AI movement detection works completely offline — the pose recognition runs locally on your device without any internet connection required during exercise sessions.

### What exercises does the app recognize?
Jumzy Kids recognizes 12 exercises: squats, jumps, hands up, arm waves, side bends, high knees, toe touches, star jumps, marching in place, overhead claps, lunges, and cross touches. Each exercise has demonstrations and real-time feedback.

### How can parents monitor and control the app?
Parents have a dedicated Parent Dashboard protected by a PIN code. From there, you can: view your child's exercise history and statistics, see weekly progress, enable or disable exercise sessions, set up app blocking, change language settings, and manage the account.

### Is there a free trial?
Yes. We offer a 7-day free trial of Premium when you sign up for either the Monthly or Yearly plan. Cancel anytime during the trial and you won't be charged.

### Does it work with Family Sharing?
Yes. Jumzy Kids supports Apple Family Sharing and Google Play family sharing. One subscription covers the whole family.

## Links

- Website: https://www.jumzykids.com
- Pricing: https://www.jumzykids.com/en/pricing
- Privacy Policy: https://www.jumzykids.com/en/privacy
- Terms of Service: https://www.jumzykids.com/en/terms
- Instagram: https://instagram.com/jumzykids
- TikTok: https://tiktok.com/@jumzykids
- Facebook: https://facebook.com/jumzykids
- Twitter/X: https://twitter.com/jumzykids