01 — Splash Screen

⚖️

ScaleSync

Your smart Bluetooth health companion

AVEOSOFT

Syncing

Connecting to your scale

02 — Login

9:41

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Welcome Back

📧

🔒

03 — Sign Up — Health Profile

9:41

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Set Up Your Health Profile

👤

🎂

Male

Female

Non-binary

📏

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01 — Today's Health Overview

9:41

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Good Morning, Alex

Last Weigh-In: 78.2 kg

Today at 7:24 AM · ScaleSync Pro

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78.2 kg

Current Weight

↓ -0.4 kg today

23.6

BMI

18.2%

Body Fat

58.4%

Hydration

Weekly Streak

5 of 7 days logged

This Week — Weight (kg)

Mon

Tue

Wed

Thu

Fri

Home

Progress

Measure

Goals

Profile

02 — Body Composition Summary

9:41

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Body Composition

64.1 kg

Muscle Mass

3.2 kg

Bone Mass

12.4 kg

Fat Mass

Muscle Goal

64.1 / 66.0 kg

Fat Reduction

Target 15% · Now 18.2%

7:24

AM

Morning Weigh-In

78.2 kg · BMI 23.6 · Fat 18.2%

Scale Connected Synced to Apple Health

Home

Progress

Measure

Goals

Profile

01 — Live Scale Reading

9:41

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Step on Your Scale

ScaleSync Pro S3

Bluetooth Connected · Ready

📡

00 : 04

Stabilizing Weight...

78.2 kg

Live Reading

↑ Stable

Signal

Excellent connection

Home

Progress

Measure

Goals

Profile

02 — Full Body Scan Results

9:41

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Body Composition Results

78.2 kg

Weight

23.6

BMI

18.2%

Body Fat

64.1 kg

Skeletal Muscle Mass

↑ +0.3 kg

58.4%

Body Water

↑ +1.2%

3.2 kg

Bone Mass

↑ Stable

Visceral Fat Index

Level 6 of 20 — Normal

Composition Breakdown (%)

Muscle

Fat

Water

Bone

Home

Progress

Measure

Goals

Profile

03 — Measurement History Log

9:41

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Recent Measurements

All

Weight

Body Fat

Muscle

Hydration

7:24

AM

Apr 22 — 78.2 kg

BMI 23.6 · Fat 18.2% · Muscle 64.1 kg

7:18

AM

Apr 21 — 78.6 kg

BMI 23.7 · Fat 18.4% · Muscle 64.0 kg

7:31

AM

Apr 20 — 78.4 kg

BMI 23.6 · Fat 18.3% · Muscle 64.0 kg

8:05

AM

Apr 19 — 79.0 kg

BMI 23.8 · Fat 18.6% · Muscle 63.8 kg

112

Total Weigh-Ins

↑ Since Jan 2026

Home

Progress

Measure

Goals

Profile

01 — Weight Trend Chart

9:41

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Weight Progress

1W

1M

3M

6M

1Y

Monthly Weight — April (kg)

W1

W2

W3

W4

-1.8 kg

Lost This Month

↓ On Track for Goal

80.0

Start (kg)

78.2

Now (kg)

75.0

Goal (kg)

Goal Progress

Lost 1.8 of 5.0 kg

Home

Progress

Measure

Goals

Profile

02 — Body Composition Trends

9:41

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Composition Trends

Body Fat

Muscle

Hydration

Bone

Body Fat % — Last 4 Weeks

W1

W2

W3

W4

18.2%

Current Body Fat

↓ -1.8% this month

64.1 kg

Lean Muscle Mass

↑ +0.6 kg this month

Mar

26

Body Fat 20.0%

Starting baseline recorded

Apr

22

Body Fat 18.2%

Current — 1.8% improvement

Home

Progress

Measure

Goals

Profile

03 — Health Score Overview

9:41

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Overall Health Score

Health Score

76 / 100 — Good

76

Health Score

Good

BMI Range

Normal

Visceral Fat

+4 pts

Score Improvement

↑ vs. last month

Score History — 6 Months

Nov

Dec

Jan

Feb

Mar

Apr

Trending Up

Home

Progress

Measure

Goals

Profile

01 — Active Goals

9:41

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My Health Goals

Weight Loss

1.8 of 5.0 kg lost

Body Fat Target

18.2% → 15% target

Muscle Gain

64.1 → 66.0 kg target

Jun

30

Reach 75.0 kg

10 weeks remaining · -0.3 kg/week pace

Jul

15

Body Fat 15%

12 weeks remaining · -0.27%/week pace

Home

Progress

Measure

Goals

Profile

02 — Set New Goal

9:41

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Create a Health Goal

Lose Weight

Gain Muscle

Maintain

Body Recomp

⚖️

📅

-0.5 kg/wk

Recommended Weekly Loss

↑ Safe & Sustainable

Est. Caloric Deficit

-500 kcal/day needed

Home

Progress

Measure

Goals

Profile

01 — Bluetooth Pairing

9:41

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Connect Your Scale

Scanning for Scales

Keep scale on and within 3 metres

📡

00 : 18

Scanning Nearby Devices...

ScaleSync Pro S3

Signal: Excellent · Last paired 2 hours ago

Generic BT Scale

Signal: Weak · Unrecognized device

Bluetooth 5.0 Active

Home

Progress

Measure

Goals

Profile

02 — Scale Device Settings

9:41

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ScaleSync Pro S3

97%

Scale Battery

↑ Charging

BT 5.0

Protocol

±0.1 kg

Accuracy

180 kg

Max Load

Auto-Connect on App Open

Sync to Apple Health

Sync to Google Fit

Smart User Recognition

🔔

Measurement Reminders

›

🔄

Firmware Update (v2.4.1 Available)

›

Home

Progress

Measure

Goals

Profile

01 — User Health Profile

9:41

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My Profile

Alex Johnson

Member since Jan 2026 · 112 weigh-ins

👤

28 yrs

Age

175 cm

Height

Male

Gender

78.2 kg

Current Weight

↓ -1.8 kg since start

7:00

AM

Daily Weigh-In Reminder

Active every morning · Streak: 14 days

⚕️

Health Integrations (Apple Health, Fitbit)

›

👨‍👩‍👧

Family Profiles — 3 Members

›

📤

Export Health Data (CSV / PDF)

›

Home

Progress

Measure

Goals

Profile

02 — App Settings

9:41

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Settings

kg

lbs

st lbs

Dark Mode

Morning Weigh-In Reminder (7:00 AM)

Show BMI on Dashboard

Privacy Mode — Hide Weight on Screen

Weekly Progress Digest Email

🔒

Privacy & Data Management

›

💬

Help & Support

›

⭐

Rate ScaleSync on App Store

›

Home

Progress

Measure

Goals

Profile

Feature Stack & Deliverables

Complete overview of confirmed features, deliverable items, and technical architecture for ScaleSync.

🏗️

Tech Stack

React NativeExpo BLEHealthKit / Health ConnectFirebaseVictory NativeTypeScript

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Core Technologies

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React Native — Cross-platform iOS & Android mobile development

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Expo BLE — Bluetooth Low Energy communication with scale GATT profiles

❤️

HealthKit / Health Connect — Native health data sync on iOS and Android

🔥

Firebase — Real-time measurement sync, auth, cloud Firestore storage

📊

Victory Native — Responsive weight trend and body composition charts

🔷

TypeScript — Type-safe codebase for scale protocol and health data models

📦

V1 Deliverables Checklist

iOS & Android Bluetooth scale pairing with auto-reconnect and multi-scale support
Real-time body composition display: weight, BMI, body fat %, muscle mass, bone mass, hydration
Interactive trend charts with 1W / 1M / 3M / 6M / 1Y time range filters
Goal setting with target weight, body fat %, muscle mass, and deadline tracking
Multi-user profile support with smart user recognition from scale readings
Apple HealthKit and Google Health Connect bi-directional data sync
Customisable weigh-in reminders with streak tracking and push notifications
Health score algorithm aggregating all body composition metrics into a single score
CSV and PDF export of complete measurement history and progress reports
Bluetooth firmware OTA update delivery for compatible ScaleSync hardware

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Architecture Layers

Mobile Client

React Native + Expo

Cross-platform UI, BLE scan & pairing flow, local SQLite measurement cache, health kit bridges, offline-first sync

Bluetooth Layer

react-native-ble-plx

BLE 5.0 device scanning, GATT profile parsing, real-time measurement streaming, multi-device management

Health Integrations

Apple HealthKit / Google Health Connect

Bi-directional sync of weight, body fat, BMI, hydration, lean mass, and bone mass metrics

Backend API

Node.js + Firebase Functions

User auth (email + OAuth), measurement history, goal CRUD, multi-user household management, push notification delivery

Data & Analytics

Firestore + Firebase Analytics

Time-series health records, trend calculations, health score engine, weekly digest generation, usage analytics

ScaleSync

Splash & Auth

ScaleSync

Dashboard

Measure

Progress

Goals

Scale Connect

Profile

ScaleSync

Feature Stack & Deliverables

Tech Stack

Core Technologies

V1 Deliverables Checklist

Architecture Layers