BLE control app development
Developing an app to support cutting edge live music performance
We partnered with Alto Professional to build a mobile app that unlocks the full potential of their speakers and amplifiers.
Mobile apps for Bluetooth
and connected devices
Build apps that reliably connect to real products.
We design and build mobile apps that communicate with physical devices over Bluetooth (BLE), including consumer products, audio equipment, and custom-built hardware where the app is a core part of the product experience.
Our focus is simple: make the connection reliable, usable, and maintainable in real-world conditions.
Bluetooth App Development
Built around the app and device together
We go beyond basic connectivity and build the full interaction layer between app and device.
Working alongside Azuki has been a real pleasure. They delivered us a fantastic product, and their expertise and problem solving were invaluable as we moved through the different stages of the project.
Matt Moore
Product Owner at Alto / inMusic Brands
Bluetooth apps are rarely challenging because of Bluetooth itself. The real complexity is bringing together hardware, firmware and mobile software into a product that works reliably in the real world.
We treat the app and device as a single system, designing the communication layer as carefully as the user experience so it's reliable today and easier to evolve tomorrow.
That often means working closely with hardware teams and embedded engineers, helping shape communication protocols rather than simply building around them.
Where this is typically used
- Companion apps for connected products
- Control apps for audio equipment and embedded systems
- Multi-device ecosystems with a single app interface
- Products where configuration, control, or monitoring happens via mobile
Bluetooth Capabilities
What we build
BLE communication and integration
Device discovery, pairing, and reconnection that stays stable under real-world conditions, including background handling and session management.
Custom device protocols
BLE command structures and communication layers that stay consistent across device ranges, so one app can support multiple products.
Control and configuration
Real-time control, structured configuration flows, and clear feedback between device state and the interface.
Firmware update support (OTA)
Over-the-air update flows via mobile, with version handling, rollback considerations, and reliable processes for deployed devices.
OtaUpdate.ts
BleSession.ts
async function startOta(device, firmware) {
await device .connect()
await transfer .chunks(firmware)
return verify .checksum()
}
Built from experience, not from scratch
Bluetooth apps are rarely challenging because of Bluetooth itself. They're challenging because they sit between hardware, firmware and software, all of which evolve throughout a product's lifetime. Building a reliable product means designing those parts to work together from day one.We've developed the Azuki BLE Library from experience across multiple Bluetooth projects, capturing proven approaches to connection management, state handling and device communication.
This allows us to:
- Handle high-frequency device communication without degrading app performance
- Maintain a clear and consistent model of device state within the app
- Build responsive interfaces even when underlying communication is complex
- Reuse proven patterns for scanning, connecting, and interacting with devices
The result is a more stable foundation, faster delivery, and fewer issues once the app is in real-world use.
Frequently asked questions
Our hardware isn't finished yet. Is it too early to start the app?
Not usually. Mobile and firmware development often progress in parallel.
In fact, starting the app early gives us the opportunity to work with your hardware team to shape the Bluetooth protocol itself. We can help define command structures, state management, error handling and versioning before they become difficult to change.
That usually leads to a simpler protocol, a better user experience, and less rework later in the project.
We don't have much experience building Bluetooth products. Can you help?
Absolutely. Many of our clients are experts in their own products rather than Bluetooth communication.
We help bridge the gap between hardware and software, advising on everything from communication protocols and connection behaviour through to the user experience. Our role is often to help the whole product work together, not simply build the mobile app.
How do you make Bluetooth apps reliable?
Reliable Bluetooth communication is about much more than sending and receiving data.
We design for real-world behaviour: devices moving out of range, interrupted connections, changing device state, background operation and failed commands. These scenarios are built into the architecture from the beginning rather than treated as edge cases after launch.
Can one app support multiple hardware products?
Yes. We've built apps that support growing product ranges with different capabilities while maintaining a consistent user experience.
This requires careful design of the communication layer so that new devices can be introduced without making the app increasingly complex or difficult to maintain.
What if our product range grows over time?
That's something we plan for from the outset.
Rather than building around a single device, we design communication layers that can accommodate firmware revisions, new hardware models and additional functionality without requiring the app to be rewritten as the product evolves.
How do you work with embedded or firmware engineers?
Very closely.
Successful connected products depend on the app and firmware evolving together. We regularly collaborate with embedded teams to define communication protocols, test new functionality and resolve integration issues throughout development.
Our aim is to make the boundary between firmware and the app as clear and predictable as possible.
We've already built a Bluetooth app, but it isn't reliable. Can you help?
Yes. We regularly work with existing products where the hardware is sound but the mobile experience isn't.
We'll investigate where problems originate—whether that's the communication protocol, connection management, firmware behaviour or the application itself—and recommend the most effective way forward. Sometimes that's improving the existing app; sometimes it's redesigning parts of the communication layer to create a more robust foundation.
Case study
A Bluetooth-connected mobile product we built for a team that needed the app and hardware experience to hold up in real use.
Ready when you are
Talk to us about your product
If you're building a connected device, or already have one that needs a reliable app layer, we can help shape the communication layer, build the app, and support it as your product evolves.