A wearable sensor that reads your muscles. An app that tells you what to do about it.
The sensor captures what your body is doing. The app tells you what it means and what to do next.
A clinical-grade EMG and 6-axis IMU sensor you stick on any muscle. It captures the raw electrical signal your body produces when it moves, and streams it to your phone at 1,000 times per second.
Free for iOS and Android. The app receives the raw signal from your sensors and translates it in real time, showing a live muscle activation map, alerting you before fatigue hits, and building a recovery score after every session.
Every time a muscle fiber contracts it fires an electrical spike. Actus reads that signal at 1,000 times per second, fast enough to catch the micro-fluctuations that predict fatigue, form breakdown, and injury risk before you feel them.
Signal-to-phone latency
The signal reaches your screen before you feel the rep complete.
Each sensor packs a 6-axis IMU: 3-axis accelerometer and 3-axis gyroscope. Actus fuses muscle signal with segment orientation in real time, so the app knows not just which muscles are firing, but exactly how your body is moving when they do.
Use a single sensor or place up to six simultaneously, on any muscle group. Actus maps activation across your entire body in one session.
+ any skeletal muscle group
Simultaneous sensors
Full bilateral coverage. Both sides, every major muscle group, one session.
The Actus app takes raw EMG and IMU streams and turns them into a calm, glanceable muscle map. No graphs to decode. Just clear cues: what to push, what to ease, and what to rest.
| Sensing | Surface EMG |
| Sample rate | 1,000 Hz |
| ADC resolution | 24-bit |
| Latency | < 20 ms |
| IMU | 3-axis accel + 3-axis gyro |
| Connectivity | Bluetooth 5.3 |
| Simultaneous sensors | Up to 6 |
| Battery life | 9 hours continuous |
| Charging | USB-C, case included |
| Water resistance | IP54 |
| Electrode type | Dry, reusable |
| Compatibility | iOS 16+ / Android 12+ |
Know exactly which muscles are doing the work, catch fatigue before it becomes failure, and make every rep count.
Track muscle reactivation after injury, confirm symmetry is returning, and share objective progress reports with your physio.
Interested in Actus? We'd love to connect — whether you're an investor, researcher, or early adopter.