ScaleSync

Smart Bluetooth Weight & Body Tracker

Page 1 of 8 — Splash & Auth
01 — Splash Screen
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ScaleSync

Your smart Bluetooth health companion

AVEOSOFT

100%

Syncing

Connecting to your scale

02 — Login
9:41
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Welcome Back
๐Ÿ“ง
๐Ÿ”’
03 — Sign Up โ€” Health Profile
9:41
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Set Up Your Health Profile
๐Ÿ‘ค
๐ŸŽ‚
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 ยท ScaleSync Pro

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78.2 kg

Current Weight

โ†“ -0.4 kg today

23.6
BMI
18.2%
Body Fat
58.4%
Hydration
72%

Weekly Streak

5 of 7 days logged

This Week โ€” Weight (kg)

Mon
Tue
Wed
Thu
Fri
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
82%

Muscle Goal

64.1 / 66.0 kg

55%

Fat Reduction

Target 15% ยท Now 18.2%

7:24

AM

Morning Weigh-In

78.2 kg ยท BMI 23.6 ยท Fat 18.2%

Scale Connected Synced to Apple Health
01 — Live Scale Reading
9:41
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Step on Your Scale

ScaleSync Pro S3

Bluetooth Connected ยท Ready

๐Ÿ“ก
00 : 04

Stabilizing Weight...

78.2 kg

Live Reading

โ†‘ Stable

100%

Signal

Excellent connection

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

โ†‘ +0.3 kg

58.4%

Body Water

โ†‘ +1.2%

3.2 kg

Bone Mass

โ†‘ Stable

68%

Visceral Fat Index

Level 6 of 20 โ€” Normal

Composition Breakdown (%)

Muscle
Fat
Water
Bone
03 — Measurement History Log
9:41
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Recent Measurements
All
Weight
Body Fat
Muscle
Hydration

7:24

AM

Apr 22 โ€” 78.2 kg

BMI 23.6 ยท Fat 18.2% ยท Muscle 64.1 kg

7:18

AM

Apr 21 โ€” 78.6 kg

BMI 23.7 ยท Fat 18.4% ยท Muscle 64.0 kg

7:31

AM

Apr 20 โ€” 78.4 kg

BMI 23.6 ยท Fat 18.3% ยท Muscle 64.0 kg

8:05

AM

Apr 19 โ€” 79.0 kg

BMI 23.8 ยท Fat 18.6% ยท Muscle 63.8 kg

112

Total Weigh-Ins

โ†‘ Since Jan 2026

01 — Weight Trend Chart
9:41
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Weight Progress
1W
1M
3M
6M
1Y

Monthly Weight โ€” April (kg)

W1
W2
W3
W4

-1.8 kg

Lost This Month

โ†“ On Track for Goal

80.0
Start (kg)
78.2
Now (kg)
75.0
Goal (kg)
58%

Goal Progress

Lost 1.8 of 5.0 kg

02 — Body Composition Trends
9:41
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Composition Trends
Body Fat
Muscle
Hydration
Bone

Body Fat % โ€” Last 4 Weeks

W1
W2
W3
W4

18.2%

Current Body Fat

โ†“ -1.8% this month

64.1 kg

Lean Muscle Mass

โ†‘ +0.6 kg this month

Mar

26

Body Fat 20.0%

Starting baseline recorded

Apr

22

Body Fat 18.2%

Current โ€” 1.8% improvement

03 — Health Score Overview
9:41
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Overall Health Score
76%

Health Score

76 / 100 โ€” Good

76
Health Score
Good
BMI Range
Normal
Visceral Fat

+4 pts

Score Improvement

โ†‘ vs. last month

Score History โ€” 6 Months

Nov
Dec
Jan
Feb
Mar
Apr
Trending Up
01 — Active Goals
9:41
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My Health Goals
58%

Weight Loss

1.8 of 5.0 kg lost

46%

Body Fat Target

18.2% โ†’ 15% target

40%

Muscle Gain

64.1 โ†’ 66.0 kg target

Jun

30

Reach 75.0 kg

10 weeks remaining ยท -0.3 kg/week pace

Jul

15

Body Fat 15%

12 weeks remaining ยท -0.27%/week pace

02 — Set New Goal
9:41
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Create a Health Goal
Lose Weight
Gain Muscle
Maintain
Body Recomp
โš–๏ธ
๐Ÿ“…

-0.5 kg/wk

Recommended Weekly Loss

โ†‘ Safe & Sustainable

30%

Est. Caloric Deficit

-500 kcal/day needed

01 — Bluetooth Pairing
9:41
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Connect Your Scale

Scanning for Scales

Keep scale on and within 3 metres

๐Ÿ“ก
00 : 18

Scanning Nearby Devices...

ScaleSync Pro S3

Signal: Excellent ยท Last paired 2 hours ago

Generic BT Scale

Signal: Weak ยท Unrecognized device

Bluetooth 5.0 Active
02 — Scale Device Settings
9:41
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ScaleSync Pro S3

97%

Scale Battery

โ†‘ Charging

BT 5.0
Protocol
ยฑ0.1 kg
Accuracy
180 kg
Max Load
Auto-Connect on App Open
Sync to Apple Health
Sync to Google Fit
Smart User Recognition
๐Ÿ””
Measurement Reminders
โ€บ
๐Ÿ”„
Firmware Update (v2.4.1 Available)
โ€บ
01 — User Health Profile
9:41
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My Profile

Alex Johnson

Member since Jan 2026 ยท 112 weigh-ins

๐Ÿ‘ค
28 yrs
Age
175 cm
Height
Male
Gender

78.2 kg

Current Weight

โ†“ -1.8 kg since start

7:00

AM

Daily Weigh-In Reminder

Active every morning ยท Streak: 14 days

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Health Integrations (Apple Health, Fitbit)
โ€บ
๐Ÿ‘จโ€๐Ÿ‘ฉโ€๐Ÿ‘ง
Family Profiles โ€” 3 Members
โ€บ
๐Ÿ“ค
Export Health Data (CSV / PDF)
โ€บ
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 โ€” Hide Weight on Screen
Weekly Progress Digest Email
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Privacy & Data Management
โ€บ
๐Ÿ’ฌ
Help & Support
โ€บ
โญ
Rate ScaleSync on App Store
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Feature Stack & Deliverables

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

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Tech Stack

React NativeExpo BLEHealthKit / Health ConnectFirebaseVictory NativeTypeScript
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Core Technologies

โš›๏ธ
React Native โ€” Cross-platform iOS & Android mobile development
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Expo BLE โ€” Bluetooth Low Energy communication with scale GATT profiles
โค๏ธ
HealthKit / Health Connect โ€” Native health data sync on iOS and Android
๐Ÿ”ฅ
Firebase โ€” Real-time measurement sync, auth, cloud Firestore storage
๐Ÿ“Š
Victory Native โ€” Responsive weight trend and body composition charts
๐Ÿ”ท
TypeScript โ€” Type-safe codebase for scale protocol and health data models
๐Ÿ“ฆ

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
๐Ÿ”ง

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