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App for Managing EV Charging

Remote control mobile app for home EV chargers

EV charging manufacturer.

Request
To build an app that connects with EV charging devices and expands on their functionality.
Result
The app was released on the Google Store and App Store. Since the app’s release, it’s gathered a 4.9 rating on both platforms and is now growing its user base.
Technologies
  • Kotlin
  • Swift
  • Android X
  • OkHttp3
  • Biometric
  • QrCode
  • BLE & Wifi communication
Result
The app was released on the Google Store and App Store. Since the app’s release, it’s gathered a 4.9 rating on both platforms and is now growing its user base.

Results

  • Top-Rated by Users

    The app was released on Google Store and App Store. Since the app’s release, it’s gathered a 4.9 rating on both platforms and is now growing its user base.

  • Continued Collaboration

    We’ve also received positive feedback from the client. At the moment, we’re working on further iterations of the product, adding more features.

Challenge

The client wanted to develop a native app for Android and iOS as a software extension of their home EV charging hardware. The app needed to connect to a home-installed EV charger, allowing users to control the charging process remotely, monitor real-time progress, and access detailed charging statistics. Additionally, it had to include a map feature that displayed nearby public charging stations, helping users locate alternative charging options when needed.

The project presented two key technical challenges. First, ensuring stable app performance across different interfaces—WiFi and Bluetooth Low Energy (BLE)—while enabling seamless switching between them. Second, maintaining strong security, as data exchanges occur through the WiFi router. To prevent unauthorized access, all data had to be encrypted.

Solution

First, we began with an in-depth client business analysis. During this stage, we outlined the tentative app design and developed a comprehensive technical specification. Our deliverables were presented to the client, and after several iterations, the app concepts and development plan received final approval.

Early on, we identified potential challenges related to technical data exchange. We realized that using cross-platform technologies would impose limitations and prevent the app from delivering a truly robust experience. After thoroughly evaluating the requirements, we determined that native app development was the best solution. We explained our reasoning to the client, highlighting the advantages of a native approach, and they fully supported our recommendation.

To overcome the limitation on transfer volumes, the data was split into smaller packages optimized for each device’s hardware. Measures were implemented to ensure these packages were correctly delivered and recognized on both ends—chargers and the app. Maintaining a specific order and filtering out incorrect or damaged data was essential for reliable communication.

We also made the data exchange process fully secure by adding multiple levels of encryption. The clients stressed that no vulnerabilities are acceptable, since the transferred data is very sensitive. Finally, one of the app's biggest value is real-time updates, so we made sure the app can perform with next to no downtime.

Ultimately, we created 2 native apps (1 for Android, and 1 for iOS), focusing on solid, uninterrupted performance and security. The apps were created from scratch and in total accordance with the approved technical specification.

How the app works:

  • The app is free to download and use, but it’s only compatible with the client’s home EV charging devices. The user can connect their mobile device with the charger using WiFi or Bluetooth.
  • Once connected, the charger can be fully controlled by the application. Users can start, pause and stop charging sessions as well as create planned sessions that would start automatically at a preset time.
  • Once the charging session starts, the user can see the progress in % at any given as well as time remaining and power consumption. If the user inputs their household electricity cost per kW, the app will also be able to calculate the money spent on any given session.
  • In case of emergency, the charger will send a notification to the app so that the user is aware of a malfunction and can address it promptly. Finally, users have access to their personal dashboards, where they can browse the charging session history.
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Connection via WiFi/BLE

The app leverages both WiFi and Bluetooth as means of connection with the charging device. This ensures uninterrupted performance and instant data exchange.

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Real-Time Updates

The app is made to provide relevant information to the user second by second. That includes charging session progress and time remaining.

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Reporting & Analytics

The app enables users to see information on all previous charges, providing them with insights on how much time and energy is spent on their sessions.

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Session Cost Calculation

The app can calculate the money spent on every session based on the amount of energy consumed and power consumption tariffs.

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Fail Safe Capabilities

If the mobile device gets disconnected from the WiFi network, the app will automatically switch to the “connection via Bluetooth” mode and vice versa. This allows for uncompromised data exchange between the charger and the mobile device. The app also alerts its user when an emergency occurs.

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Public Charging Stations

The app helps users find nearby public EV charging stations on a map. It provides real-time availability, pricing details, and navigation to the selected station, ensuring a seamless charging experience both at home and on the go.

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