Accountable

Accountable: Driving safety through technology and design.

Strategy

Product

Design

Development

Website

~150

Peak paying users

2.5 months

From concept to launch

World ranking mobile view
World ranking mobile view
World ranking mobile view
Accountable's logo design
Accountable's logo design
Accountable's logo design
Accountable Website hero section
Accountable Website hero section
Accountable Website hero section
Daily driving log mobile view 1
Daily driving log mobile view 1
Daily driving log mobile view 1
Daily driving log mobile view 2
Daily driving log mobile view 2
Daily driving log mobile view 2
Dashboard desktop view
Dashboard desktop view
Dashboard desktop view

The challenge

Every year, distracted driving takes thousands of lives and causes over 1.6 million accidents. Our client wanted an app that tied teens’ monthly allowances to safe driving habits. We recommended validating the core technology first: detecting phone use behind the wheel with high accuracy, before adding financial incentives. The main challenges were ensuring accuracy across iOS and Android, avoiding false positives when the user was a passenger, and working within the limits of GPS and background processes.

Our solution

To bring the vision to life, we built Accountable, a mobile and web app supported by a custom Bluetooth beacon. The beacon authenticates vehicle presence so tracking only occurs in the driver’s own car. By combining GPS, beacon proximity, and OS-level phone usage detection, the system delivered reliable accuracy where other approaches fell short.

We designed clean, modern UIs that made complex safety data easy to understand at a glance. Parents gained clear oversight and peace of mind, while young drivers were motivated by intuitive dashboards, progress tracking, and gamified rewards.

We tested the system on the road in real vehicles to fine-tune tricky scenarios such as idling at traffic lights or GPS drift, ensuring accuracy before launch.

Key features:

  • For families: Parent/child accounts, driving dashboards with safety scores, trip history, and notifications

  • For drivers: Behavior tracking (phone usage, speeding, harsh braking), rewards through points, milestones, and streaks

  • For admins: Web app for oversight, reporting, and account management

  • For launch: A marketing site designed in Figma and built in Webflow

Tech stack

We selected a modern stack that ensured cross-platform reliability, high performance, and rapid iteration.

  • Mobile app: Flutter with custom native iOS components

  • Web app: SvelteKit

  • Backend & database: Supabase

  • Hardware integration: Custom Bluetooth beacon for proximity checks, GPS and motion detection for speed and driving state recognition

  • Marketing site: Designed in Figma, built in Webflow

Interested in working with us?

Let's discuss your idea and create a roadmap to bring it to market.

Free 30-minute strategy call • No commitment required

© 2025, FeatherFlow

Based in Germany, European Union

Interested in working with us?

Let's discuss your idea and create a roadmap to bring it to market.

Free 30-minute strategy call • No commitment required

© 2025, FeatherFlow

Based in Germany, European Union

Interested in working with us?

Let's discuss your idea and create a roadmap to bring it to market.

Free 30-minute strategy call • No commitment required

© 2025, FeatherFlow

Based in Germany, European Union