BLE · HEALTH SDKS
Wearables & fitness
Smartwatches, bands, and fitness equipment: pairing funnels, live sensor streams, and health-platform sync.
Hardware app development company for connected devices
Appther builds reliable companion apps that connect mobile and cloud to your physical hardware. From BLE wearables to industrial IoT, we handle the app side end to end.
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TRUSTED BY
How It Connects
Device to app to cloud, one data path
Whatever the product, the work is the same three links. We build the second and third, and make the first one reliable.
Your device
Sensors and firmware emit data over BLE, Wi-Fi, NFC, or serial.
Companion app
Pairs, streams, controls, and shows the data people actually use.
Cloud backend
Sync, storage, fleet dashboards, alerts, and OTA orchestration.
What We Build
Companion apps for every class of device
Six device categories where we have shipped real products, not just demos.
BLE · HEALTH SDKS
BLE · REGULATED
Medical & health devices
Monitors, diagnostic tools, and patient-facing apps built to HIPAA technical safeguards.
MATTER · ZIGBEE
Smart home & appliances
Matter and Zigbee device control apps with provisioning and local-first control.
MQTT · TELEMETRY
Industrial & IoT sensors
Telemetry, monitoring, and control dashboards at fleet scale.
GPS · CAN BUS
Mobility
E-scooters, EV chargers, and fleet devices with live location and remote control.
KIOSK · SERIAL
Retail & vending
Connected kiosks and vending apps with payment and stock telemetry.
Connectivity & Protocols
The protocols we support, named explicitly
Every device conversation starts with "what does it speak?" Here is our answer, and only what we genuinely support in production.
Our scope covers the GATT level and above. We build the app-side communication layer and integrate with your firmware team's work, so responsibilities never blur.
SUPPORTED
BLE (Bluetooth Low Energy)
GATT client · MTU tuning · background sync
SUPPORTED
Bluetooth Classic
SPP · A2DP device links
SUPPORTED
Wi-Fi
Provisioning · local + cloud control
SUPPORTED
NFC
Tap-to-pair · tag read/write
SUPPORTED
Zigbee / Matter / Z-Wave
Smart-home bridges & controllers
SUPPORTED
USB / Serial
UART · RS-232 · RS-485
INTEGRATION
Vendor SDKs and application-level APIs, device OEM SDKs, health platforms, and proprietary protocol docs
Cloud backends for sync, storage, and remote control, built on AWS or Azure with per-device identity
OTA firmware-update flows in the app: staged rollout, resume on failure, and clear user messaging
Honest Positioning
We build the app. Your firmware team builds the device.
Every connected product is a stack. We own everything from the GATT layer up, and we say so before the contract is signed. That clarity is why our integrations ship without finger-pointing.
No firmware team yet? We bring embedded partners we have shipped with before, one accountable roadmap, two specialist teams.
We buildGATT LEVEL AND ABOVE
Companion appPairing UX, live dashboards, device control, OTA-update flows
GATT / SDK integrationProtocol clients, vendor SDKs, data pipelines, reconnection logic
Cloud & dashboardsSync, storage, fleet control, and analytics on the device streams
Your firmware team buildsOR OUR EMBEDDED PARTNERS
Embedded firmwareCode running on the device microcontroller
Electronics & PCBBoard design, sensors, and low-level hardware
Mechanical & enclosureIndustrial design and manufacturing
One roadmap, one point of accountability, two specialist teams when you need the full stack.
Security & Compliance
Device data handled like it matters, because it does
Health and industrial data carries real obligations. Here is exactly how we handle it, and only what we can honestly claim.
Encrypted end to end
TLS in transit, AES-256 at rest, and encrypted BLE bonding where the hardware supports it. Secrets never live in the app binary.
HIPAA-ready builds
For health devices we architect to HIPAA technical safeguards: access controls, audit logs, and BAA-compatible cloud services.
GDPR-compliant data handling
Data minimisation, consent flows, EU residency options, and working export and deletion endpoints, built in from the first sprint.
NDA & IP protection
NDA signed before any technical conversation. You own all code and IP, with role-based access to repos and device documentation.
We are not a certification body: formal HIPAA or ISO attestation of the finished product remains with your compliance team, and we build and document to make that audit straightforward.
How We Work
Prove the device link first, then build
Hardware projects die at the connection layer, so that is what we de-risk in week one, on your physical device, not a simulator.
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WEEK 101
Device & protocol audit
Datasheets, GATT profiles, vendor SDKs, and power budget reviewed before any estimate is signed.
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WEEK 2–402
Connectivity prototype
Pair, stream, and stress the link on your real hardware: throughput, reconnection, MTU, background sync.
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WEEK 4–1003
Companion app build
Pairing UX, live dashboards, device control, and offline-first sync, built against the proven link.
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WEEK 10–1404
Device-in-loop testing
Real devices across OS versions, RF interference, low battery, and firmware variants, never emulators alone.
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ONGOING05
Launch & fleet monitoring
Store release, staged OTA rollouts, and sync-health telemetry per firmware version across the fleet.
Tech Stack
Built by layer, AI where it earns its place
As an AI-first company we put intelligence on the device stream itself: anomaly detection on telemetry, on-device inference for instant response, and analytics that turn raw sensor data into decisions.
LAYER 01
Mobile
Swift & KotlinCoreBluetooth and Android BLE stacks for protocol-heavy apps
React Native / FlutterShared codebase with native BLE modules where it matters
LAYER 02
Device link
BLE / Serial LibrariesGATT clients, MTU tuning, background sync, reconnection logic
Device AnalyticsPairing funnels, sync health, and crash telemetry per firmware
LAYER 03
Cloud & backend
AWS IoT / Azure IoT HubPer-device identity, telemetry ingestion, remote control
Node.js & PythonAPIs, data pipelines, and device fleet management
LAYER 04
Data & AI
Time-series StoresSensor streams stored and queried at device scale
On-device + Cloud ModelsAnomaly detection and intelligence on device data streams
Hardware Proof
Devices we have already connected
01 / 03
SERIAL · TCP/IP · WEIGHBRIDGE
Weighbridge wired straight into the ERP at a working sugar mill
Cane trucks arrived with paper slips and disputed tonnage. We integrated the weighbridge controller with Odoo over serial and TCP/IP, so every weighment is captured automatically and linked to the farmer slip, vehicle and trip record with no manual re-entry.
Read the sugar mill ERP case studyIndustries We Serve
Wherever a device meets a workflow
DEVICE LAB
Every build tested on physical hardware
Why Appther
Hands-on hardware integration, not just app UI
AI-first: intelligent features built into the device experience, from anomaly detection to on-device inference
Real hardware testing: physical devices in the loop from the first sprint, never emulators alone
Since 2018: 200+ products shipped across mobile, cloud, and connected devices
Clear scope: you know exactly what the app layer covers before the contract is signed
Device needs an ERP behind it? We pair hardware apps with Odoo services for inventory, service, and billing. Also see our IoT app development, mobile app development and AI engineering practices.
IoT Insights
From our engineering blog
FAQ
Hardware app development, answered
What is hardware app development?+
Hardware app development is building the software that lets a mobile or web app communicate with a physical device. It covers the connection layer (BLE, Wi-Fi, NFC, USB/Serial), real-time data handling, device control, and the cloud backend behind it.
What is the difference between a hardware app and firmware?+
Firmware runs on the device itself and controls its electronics. A hardware app runs on a phone, tablet, or browser and talks to that firmware over a protocol like BLE. Appther builds the app side, working at the GATT level and above, and partners on embedded firmware where needed.
Which connectivity protocols do you support?+
BLE and Bluetooth Classic, Wi-Fi, NFC, Zigbee, Matter, Z-Wave, and USB/Serial (UART, RS-232, RS-485), plus vendor SDKs and application-level APIs with cloud backends for sync, storage, and remote control.
How much does hardware app development cost?+
A connectivity prototype that proves the device-to-app link typically starts around $10,000. A production companion app with pairing, dashboards, and cloud sync usually lands between $35,000 and $80,000 depending on protocols and platforms. Every project gets a fixed quote before we start.
How long does a hardware app project take?+
A connectivity prototype takes 2 to 4 weeks. A full companion app typically ships in 10 to 16 weeks, including testing on real hardware and store release.
Can you work with our existing device SDK?+
Yes. We integrate vendor and OEM SDKs regularly, and where no SDK exists we work directly against the GATT profile or serial protocol documentation. A short SDK review is part of every discovery phase.
Have a device that needs an app? Let's connect it.
Tell us the device and the protocol it speaks. An engineer, not a salesperson, replies within one business day with a connectivity assessment, timeline, and fixed quote.
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