Hy5 App

Smooth interaction with a prosthetic hand

Connect a prosthesis with a mobile app for effortless management — the case of Hy5 App.

Tech Solutions & Platforms



Node JS

iOS TrueDepth Camera

Key Features


Help Center

Change the Dashboard

Diagnostic View

Log the diagnostic

3D scan

Case type



Internet of Things

Stable mobile solution for the world’s first hydraulic hand prosthesis

A mobile application by Hy5 was created for the users of their hand/arm prosthesis MyHand. It enables people to connect it via Bluetooth with a smartphone or tablet, creating a smart system with a web admin panel for receiving reports from users as well. 

LANARS had the task to remake the already existing application and build a more stable and scalable product on Flutter since such a tech solution is the best way to enhance user experience with MyHand prosthesis, engaging users in the process of training.

The admin panel helps with having accurate reports from the users, improving communications with the end-user, and covering their problems with their smart prosthesis. The main and central feature of this product — is the ability to take a 3D scan. Usually, people have to visit a medical center several times to scan their arms/hands. But with Hy5 App they can save time and make scans from home, and receive a direct look into the prosthesis through their phones or tablets.

Product advantages

Connect via Bluetooth, customize settings, get EMG signals charts, and improve myo-signal response with muscle training — all in your pocket with Hy5 App. Discover more features of the application in the advantages section.

Bluetooth connection

Hy5 App connects with MyHand through a Bluetooth signal in the prosthesis. Pair MyHand with a phone or tablet once the app is downloaded. Bluetooth in MyHand is activated by holding the On/Off button for approximately 5-6 seconds.

Battery & EMG signals

In the Dashboard module of the app, the battery status can be checked, as well as the service status of MyHand. In the Diagnostics module, the status of MyHand might be checked by running a diagnostic and sending the report to the Hy5 team. When this is done, Hy5 analyzes the results and gets back to the user. A log report can be created too. This function is used mainly for logging the EMG signals and suggesting an optimal setting for the patient.


In the Settings module, the settings of MyHand and the myo-sensors can be adjusted to the patients’ preferences.

Training platform

The Training module contains a function for checking the current myo-signal response. Moreover, several games are available which can be used for muscle training to get better performance with MyHand.

Challenges and solutions

Adding 3D scanner


The first and foremost challenge was to find the right tech solution for 3D scanning hands/arms and sending the scan for printing a 3D model of the prosthetic socket without needing to visit medical centers. Many of the options didn’t fulfill the requirements or offered poor performance.


LANARS team conducted thorough research on the topic of available solutions for 3D scanning, discussed the pros and cons of the options, and the most suitable variant was chosen — TrueDepth Camera (available in streaming mode).

Rewriting in Flutter


We needed to transform the existing app into a convenient and productive tool with a custom design suitable both for Android and iOS.


The team decided to choose Flutter for this transformation. It allows the creation of one codebase — BLE communication logic is implemented only once, but the product is working on both operating systems — Android and iOS. The hot reload feature enables the team to fix issues during the development process more efficiently. Also, custom design for both platforms is created easily.

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