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Lumysi

Wellness that wears like jewelry

Page 1 of 9 — Launch & Onboarding
01 — Splash
9:41
●●●
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Lumysi

Wellness that wears like jewelry

02 — Permissions

A few permissions

So your bracelet can talk to your phone and surface insights gently, in the background.

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Bluetooth

Required to pair and sync with your Lumysi bracelet.

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Notifications

Gentle nudges for sleep, recovery and cycle insights.

❤️

Health data

Read and write to Apple Health · Google Fit.

You stay in control. Permissions can be revoked anytime in Settings.

03 — Pairing

Step 2 of 3

Pairing your bracelet

Hold your Lumysi near the phone. We will find it in a moment.

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● Scanning

Looking for nearby devices…

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Lumysi · A4:7C:E2

Signal strong · −52 dBm

CONNECT
01 — Today Dashboard

Tuesday · May 26

Good morning, Sarah

SK

Readiness

87

Optimal

Your body is well-recovered. A good day to push a little.

Activity

6,420

steps · 4.1 km

Recovery

92%

restored

Today's insight

Your HRV trended up overnight

Average rose 8 ms versus last week. Sleep consistency is paying off.

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View calendar

Trends across the month

01 — Vitals Dashboard

Vitals

Live from your bracelet · synced 2 min ago

Heart Rate

68 bpm

Resting · normal range

Resting HR

54

↓ 2 vs avg

HRV

62 ms

↑ 8 vs avg

Respiratory

14 br/min

Steady

Skin Temp

+0.2°

vs baseline

Strain Today

Moderate

12.4 out of 21 · room to push or recover, your call.

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Cardio fitness

VO₂ max · 41.2 · above average

01 — HR 7-Day Chart

Heart Rate

Day
Week
Month
Year

7-day average

66 bpm

↓ 1.4 vs last week
MonTueWedThuFriSatSun
Max
Avg
Resting

Interpretation

A calmer week than usual

Resting HR is down 1.4 bpm versus last week. Consistent sleep and lighter caffeine appear to be helping recovery.

01 — Sleep & Cycle Overview

My Health

Sleep, cycle and how they shape your week

Last Night

7h 42m

Sleep score 88 · Excellent

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11:02 PM6:44 AM

Cycle · Day 14

Ovulation window

PEAK
MenstrualFollicularOvulationLuteal
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Hormonal balance

Estimated from temperature + HRV

Lifestyle correlation

Sleep quality is 12% higher on days with morning walks.

01 — Cycle Phase Detail

Cycle insights

Current cycle

Day 14 of 28

PEAK
MENSTRUALFOLLICULAROVUL.LUTEALD1D5D10D14D18D23D28

Curve = skin temperature deviation from baseline (°C)

Peak fertility

Today and tomorrow

Temperature rose 0.34°C overnight, the strongest signal in this cycle. HRV pattern aligns with ovulation.

Avg cycle

28 days

±1.2 days

Next period

Jun 9

in 14 days

01 — Profile / Device

Profile

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Lumysi · Rose Gold

Connected · syncing in background

Battery

82%

Firmware

2.4.1

Signal

Strong

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Firmware update available

v2.5.0 · install now

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Notifications

Sleep, recovery, cycle

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Units

Metric · °C · km

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Privacy & data

Health data is end-to-end encrypted

❤️

Apple Health · Google Fit

Connected · 2-way sync

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Support

Get help, send feedback

01 — Update in Progress

Firmware update

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● Installing

66%

Step 2 of 3 · writing image to bracelet

Currentv2.4.1
Installingv2.5.0
2.1 MB of 3.2 MB~ 40 sec left
⚠️

Do not disconnect

Keep your phone near the bracelet until install completes.

Lumysi V1

A jewelry-inspired wellness companion for iOS and Android, paired with the Lumysi BLE bracelet. Decodes raw sensor data into a calm, premium experience covering readiness, vitals, sleep, cycle and hormonal balance. Designed to feel closer to a wellness ritual than a technical dashboard.

⚙️

Tech Stack

Flutter 3.x · iOS + Android
flutter_blue_plus (BLE GATT)
Nordic DFU · OTA pipeline
Riverpod · Drift (local store)
Node.js + Fastify · PostgreSQL
Apple HealthKit · Google Fit
Firebase Auth + FCM
Sentry · Mixpanel · CodePush
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Core Technologies

  • Flutter — Single codebase, native feel on both stores
  • BLE GATT — Custom services for vitals, sleep, cycle, OTA
  • Nordic DFU — Secure signed firmware updates over BLE
  • Insight engine — Sleep · cycle · hormonal · recovery models
  • Node + Postgres — Cloud sync, encrypted health data, multi-device
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V1 Deliverables

iOS and Android apps in Flutter, signed for App Store + Play Store submission
V1
BLE comms layer with GATT service + characteristic discovery, packet parsing, retry and reconnection
V1
OTA firmware update flow with Nordic DFU, integrity checks, resume on disconnect
V1
Today tab: readiness ring, activity, recovery, daily insight cards
V1
Vitals tab: HR, RHR, HRV, respiratory rate, skin temperature, strain, cardio fitness with 7-day trends
V1
My Health tab: sleep stages, cycle tracking with phase chart, hormonal balance, lifestyle correlations
V1
Profile tab: device status, battery, firmware, units, notifications, privacy, support
V1
Onboarding, permissions, account creation, bracelet pairing flow
V1
Apple Health + Google Fit two-way sync
V1
End-to-end encrypted health data at rest and in transit
V1
Personalised coaching from longitudinal trends
V2
Premium subscription tier with deeper hormonal and fertility insights
V2
Apple Watch + Wear OS companion glances
V2
Family sharing for cycle and recovery summaries
V2
Clinician export and PDF reports
V2
Multi-bracelet households on one account
V2
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Architecture Layers

MOBILE
Flutter · Riverpod · Drift cache · Sentry
BLE
flutter_blue_plus · GATT services · Nordic DFU · packet parser
API
Node + Fastify · JWT · OpenAPI · webhooks
DATA
PostgreSQL · S3 cold storage · Redis cache · field-level encryption
HEALTH
Apple HealthKit · Google Fit · 2-way sync
OPS
Fly.io · GitHub Actions · Firebase · Mixpanel · CodePush