FENR · IPHONE + APPLE WATCH

Your bike.
Clearly connected.

The complete open-source riding companion for compatible Stark electric motorcycles. Live telemetry, full navigation, battery insight and guarded controls, without the noise.

Join the TestFlight Explore FENR

Independent. Open source. Rider-built.

FENR dashboard showing speed, battery, power mode and energy use

LIVE BIKE DATA

RIDE · NAVIGATE · UNDERSTAND

Live telemetryRoad + trail navigationGuarded controlsLive Activities

THE WHOLE RIDE, IN ONE PLACE

Everything important.
One glance away.

FENR starts as a focused speedometer and unfolds into the tool you need next. Scroll through the real app, from riding and navigation to charging, setup and diagnostics.

Scroll to explore

Ride Navigate Cards Charge Battery Control Bike log Telemetry Live

01 · LIVE DASHBOARD

Ride with the signal, not the noise.

Speed, battery, map, power and regeneration stay legible in a landscape-first display.

03 · DYNAMIC CARDS

A dashboard that adapts to the moment.

Keep the cards you use, order their pages, and swipe vertically without leaving the riding display.

04 · CHARGE + BATTERY

Charging, without guesswork.

See power, target, ETA and temperature, keep charging visible through Live Activities, and inspect every validated cell when you need the deeper picture.

FENR charging dashboard with power and charge-target controls

05 · BATTERY HEALTH

See the pack, not just a percentage.

Inspect state of health, cell spread, voltage deviation, balancing and every temperature sensor from live validated data.

FENR Battery Health overview with state of health, voltage and cell delta

FENR battery cell detail with pack range and health distribution

06 · GUARDED CONTROLS

Five maps. Your preferred response.

Adjust supported base-map power and regenerative braking, with traction controls available only when compatibility is verified.

FENR Power Modes screen showing five maps and performance controls

07 · BIKE LOG

Every ride. Every service. One record.

Compare ride energy and dynamics, then log maintenance, costs and reminders against published Stark service guidance.

FENR ride history with distance, time and efficiency

FENR maintenance log with service details and reminders

08 · ADVANCED TELEMETRY

When you want the whole signal.

Open decoded vehicle, battery and power values, inspect connection quality and export Bluetooth capture logs for deeper analysis.

FENR live diagnostics with power, battery and connection telemetry

09 · LIVE ACTIVITIES

The essentials stay visible.

Follow battery, mode, speed and bike state from the Lock Screen and Dynamic Island. Charging adds target, ETA, power, current and temperature.

FENR Live Activity on the iPhone Lock Screen

8riding card types

2navigation modes

5editable base maps

DYNAMIC CARDS

One dashboard.
Your order.

Speedometer always opens first. Charging takes over only when the bike is plugged in. Everything else is a configurable vertical deck. Depth is one swipe away, never all over the screen.

01
SpeedometerAlways first while riding
02
Bike LockLock and unlock from the dashboard
03
Ride NavigationLaunch or return to active guidance
04
Current TripTime, distance, speed and trip battery
05
EfficiencyLive consumption and 10-ride trend
06
RangeAdaptive estimate and battery use
07
System HealthHealth, cells and thermal pages
08
Ride DynamicsLean, pitch and course instruments

MORE THAN A DASHBOARD

From trailhead
to workshop.

Useful depth for every part of owning and riding an electric motorcycle.

Dynamic Cards

Swipe through a dashboard that changes with the ride. Speed stays first, charging appears automatically, and every other card can be shown, hidden or reordered.

Trip · Efficiency · Range · Health · Dynamics

Complete navigation

Plan road routes, record as you go, import or export GPX, follow a trail in either direction and get clear off-trail, fork and road-exit guidance.

Road · Enduro · GPX · Saved routes

Charge and battery

Control supported charge power and target state of charge, then inspect pack health, cell balance, voltage delta and thermal data in one place.

Power · Target · Cells · Thermal

Bike controls

Tune power, regenerative braking, traction and regen traction for five base maps when supported. Bike Lock adds optional PIN and Face ID protection.

5 maps · Capability-gated controls

Ride history

Keep distance, time, speed, efficiency and energy use for every ride, with lean, pitch, peak use, peak regen and recent-ride comparisons.

Energy charts · Dynamics · Comparisons

Maintenance log

Record service, repairs, workshop notes and cost. Turn published Stark guidance into editable reminders by date, riding hours or odometer.

Service history · Official guidance

Advanced telemetry

Go deeper with decoded and raw vehicle, battery and power signals, connection events, signal strength and exportable Bluetooth capture logs.

Live values · Raw flags · BLE logs

Live Activities

Keep the ride visible beyond the app. The Lock Screen and Dynamic Island show battery, mode, speed and run state while riding, then charge target, ETA, power, current and temperature while plugged in.

Lock Screen · Dynamic Island · Ride + charge

THE BIKE LOG

Look after the ride, not a spreadsheet.

Log inspections, oil, suspension, brakes, chain, tires, coolant and electrical work. FENR includes published Stark interval guidance and turns it into reminders you can edit around how and where you actually ride.

By dateBy riding hoursBy odometer

FENR maintenance entry with service details and reminders

FENR ON APPLE WATCH

On your wrist.
Direct from the bike.

The Watch app connects directly over Bluetooth for compact ride and charging telemetry. No iPhone relay required.

Direct BluetoothRide + charge viewsTelemetry-only

FENR Watch app showing charge percentage, ETA, power and current

79% CHARGEDDIRECT CONNECTION

OPEN BY DESIGN

Read the code.
Check the boundaries.

FENR is open source because trust should be inspectable. See how telemetry becomes a dashboard, how controls are gated, and how clean-room interoperability is documented. Fork it, question it, or help make it better.

Explore FENR on GitHub Protocol research

BUILT WITH RESTRAINT

Control without shortcuts.

Most of FENR is read-only. Supported writes are deliberately narrow, capability-aware and designed to stop when the bike cannot confirm the expected state.

Firmware-aware

Controls become available only when reported firmware, capability and live telemetry support them.

Serialized by design

Writes stay ordered, start with safe no-op checks and preserve every related value.

Confirmed fresh

A request is not treated as success until telemetry or a fresh read-back matches it.

Inspectable

The implementation and protocol research are public, so safety boundaries can be reviewed rather than merely promised.

COMING TO TESTFLIGHT

Take the whole ride with you.

Dashboard, navigation, diagnostics and bike care. One focused app, built in the open.

Join the TestFlight

Your bike.Clearly connected.

Everything important.One glance away.