Compex Ultimate

Compex Ultimate keeps people engaged in their training by meeting them where they already are: preparing for a competition, using their existing fitness app or spending their first five minutes with the product. Rather than asking them to build an entirely new habit from scratch.

Someone preparing for a 10-kilometre run receives tailored stimulation sessions and push reminders rather than a generic training plan. Additional goals are available to everyone as in-app purchases.

Compex also connects directly to Strava for users of the fitness tracking app. A recovery session is automatically added to their training log after a workout, without users having to enter anything twice.

A first session that makes users want to come back. New users are guided through registering their modules and creating a personal profile with a short checklist. What could have been an empty, intimidating form becomes a clear, quick first success.

Compex Ultimate makes a technically complex physical interaction effortless, from password-free sign-in via Magic Link to starting a session in four taps or fewer, with one-handed controls in the thumb zone and readability tested in both light and dark modes. Guidance continues beyond the initial setup and throughout every session, so users always know what to do next without having to think about the technology behind it.

Simple setup. Users sign in via a Magic Link sent by email, with no password required. As soon as a module is connected, the app displays its battery level and provides an early warning if there is not enough charge to complete a full session.

Tailored goals. Different categories and sports help users find the right personalised goals. They can select their goals and plan towards a competition date. The training schedule is then calculated backwards from that date to ensure the plan fits perfectly.

Step-by-step guidance for every session. Before each session, step-by-step instructions show users how to position themselves (sitting or standing) and where to place the electrodes and module, removing the guesswork often associated with muscle stimulation devices.

Feedback that keeps users moving. Throughout each session, users are kept informed about what is happening and what they should or should not do. They are encouraged to push their limits during strength or endurance training sessions.

Quick to start, designed for one hand. A session can be started in four taps or fewer. The most important controls (start/stop, intensity) are positioned within easy reach of the thumb for one-handed use. The in-session layout deliberately focuses on the lower half of the screen, also known as the thumb zone. Controls are clearly positioned to remain easy to use, even for people with limited fine motor skills. Contrast has been specifically tested in both light and dark modes to ensure good readability in different lighting conditions.

Compex Ultimate's technology stack transforms a live, potentially unreliable Bluetooth connection into a stable, secure and fully native experience on both platforms, without users ever having to think about the technology behind it.

At the heart of the new product range is Muscle Intelligence (MI Scan, MI AutoRange, MI TENS, MI Action). The technology monitors how a muscle responds during a session and automatically calculates the right stimulation intensity for each phase: warm-up, contraction and relaxation. Those who prefer to stay in control can adjust the intensity manually at any time.

Behind the scenes are wireless, rechargeable modules that connect via Bluetooth and are held in place by a magnetic electrode system. Up to four modules can operate simultaneously, all controlled through a single app. The separate remote control used in previous generations of Compex devices is no longer needed. Everything is now controlled directly from the smartphone.

• Up to 4 modules operating simultaneously
• 3 training phases automatically detected and adjusted
• No separate remote control required
• Battery level and low-battery warnings displayed as soon as a module is connected

One core, two native platforms. A shared Kotlin Multiplatform core powers two fully native experiences: Jetpack Compose on Android and SwiftUI on iOS. The same core controls and synchronises two different hardware ecosystems – Bluetooth and wired devices – while each platform retains its native look and feel and OS integration. No compromises on either side.

Offline by design. The app works entirely without an internet connection, except when initially loading the goals catalogue and making online purchases. It also continues running in the background: a session carries on even when the smartphone goes into sleep mode or users switch to a music app during stimulation.

Security and data protection. Compex Ultimate is a medical device certified in accordance with IEC 62304, the standard governing the software lifecycle requirements for medical devices. This sets the benchmark for how the app handles communication, reliability and security. In practice, API credentials are protected on both platforms using AES-GCM encryption, with keys stored in the Android Keystore or as secure Keychain entries on iOS. All data traffic is transmitted over HTTPS. Every release includes a CycloneDX Software Bill of Materials (SBOM), with dependency checksums verified before the build.

Built to last. Android and iOS support both hardware generations (G19 and G21), resulting in four separate release combinations. Each is subject to the same quality gate: shared automated tests, screenshot tests, linting and static analysis for every pull request, alongside dedicated test runs in the iOS simulator. Fastlane delivers builds to the internal testing tracks on Google Play, TestFlight and the App Store.