Sabban&Co

App

Focused apps for everyday use.

Sabban&Co develops app experiences around a clear purpose. We consider the interaction, the information on screen and the context in which the app is used, from an initial concept to a working product.

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LEROSALEROSABy Sabban&Co

iPhone & Apple Watch

Your movement.
Your rhythm.

An interval timer that keeps you in your movement. Build your session, follow vibration cues and understand the effort you put in.

WorkRestTotal
Actual Watch recovery interval settings
Your effort, live.
Real screens. Inside LEROSA.
Personal intervalsWrist hapticsLive sessionTraining insights

The language of movement

A signal.
And you know what’s next.

Work, recovery and the finish each have their own place in the session. Explore the three moments, then see them on the real LEROSA screens below.

Work / A clear cue to begin the effort.

Visual explanation of the phases. The actual haptic patterns play on your device.
LEROSAWORKFind your rhythm
THE CUEBegin.
YOUR ATTENTIONOn the movement.Less looking. More feeling.
iPhone ↔ Apple WatchTogether or independently
LEROSA interval programs and custom sessions
LEROSA precise work, recovery and total time settings
Built around your time
Enlarged native work duration

01 / Make the session yours

A starting point.
Endless personal rhythms.

Choose a ready-made interval program or create your own. Set work, rest and total time with the three connected rings, then refine the durations with the app’s precise controls.

Your total duration is built from complete work-and-rest cycles. Choose how many cycles to repeat, from a single round to a longer session, with a total duration of up to 24 hours.

  • Ready-made programs and custom intervals
  • Separate controls for work, recovery and total time
  • Saved sessions, ready for your next workout

02 / Stay in the movement

Don’t watch the seconds.
Feel the change.

On Apple Watch, distinct haptic patterns guide work, recovery and the countdown between phases. Feel the signal on your wrist and keep your attention on your exercise.

Native Watch recovery interval screen
Recover with intention.
Recorded during a workout
Work cueRecovery cue
Native Watch completed session summary
Every session has a finish.

Pause when you need to. Resume when you are ready. LEROSA brings the structure; you choose the pace.

Inside the session

The rhythm.
And every detail behind it.

Get closer to the actual interface. Watch the countdown, follow the measurements, then explore the record of your effort.

01 / THE LIVE TIMER

Keep moving.
Let the rhythm guide you.

Work and recovery remain distinct. The changing ring and countdown keep the active phase clear at a glance.

03 / Together, or independently

Your phone.
Your watch.
One connected session.

Prepare your intervals on iPhone and send them to your paired Apple Watch. Connection status makes it clear when the devices can communicate, while your active session and completed workout can move between them.

No Watch? Run your interval session directly on iPhone. The timer and phone vibration cues work with LEROSA open and active. With Apple Watch, the cues stay on your wrist while you train.

iPhoneApple Watch
Actual LEROSA Watch connection, workout and synchronization controls
Actual completed session on Apple Watch
A clear connection

Prepare. Send. Train.

Actual LEROSA best and worst cycle analytics with energy chart
Understand the effort behind the time.

04 / See what went into it

The session ends.
The insight stays.

Review completed cycles, work and recovery totals, and available heart-rate and energy measurements. Explore the strongest and lowest points of the session, then add your own effort rating to give the numbers context.

Training history helps you return to previous sessions and compare the work over time. Health measurements depend on the device, the available recording and the permissions you choose.

CyclesHeart rateEnergyEffort

05 / The details make the difference

More than a countdown.

A considered experience before, during and after your workout. Explore the real screens that bring it together.

Actual LEROSA weekly summary and rings
Your week, in perspectiveReturn to your daily rings and training goals.
Real LEROSA program library
A place to beginBrowse programs and prepare a personal session.
Real LEROSA sharing and CSV export screen
Take your progress with youShare a session summary or export your training history as CSV.
Real LEROSA cycle analysis screen
Go beyond the totalExplore cycle details and available workout measurements.

A finish worth celebrating

You did the work.
Enjoy the finish.

Your session becomes a record you can revisit. Work, recovery, elapsed time and available measurements stay together in the completed workout.

LEROSA also gives that moment a little celebration. Preview the confetti here, then explore the real session summary.

Ready for another rhythm.
Actual LEROSA completed workout on Apple WatchThe complete picture.
A real LEROSA session.

Made for your Apple devices

Your rhythm. Your device.

Use LEROSA on iPhone by itself, on Apple Watch, or with both connected.

iPhone iOS 17 or later
  • iPhone Duo
  • iPhone 18 Pro
  • iPhone 18 Pro Max

Also supports earlier iPhones, down to iPhone SE (3rd generation).iOS 17 or later.

Apple Watch watchOS 10 or later
  • Series 4
  • Series 5
  • Series 6
  • Series 7
  • Series 8
  • Series 9
  • Series 10
  • Series 11
  • Series 12
  • SE (1st gen)
  • SE (2nd gen)
  • SE (3rd gen)
  • Ultra
  • Ultra 2
  • Ultra 3
  • Ultra 4

Compatibility is based on the app’s current system requirements. Keep your devices on a supported software version. Pairing requirements vary by Apple Watch model and installed watchOS; newer watches may require a newer iPhone or iOS version.