Smart Insulin Pen Prototype: Clip-On Dose Logging Module and Companion App with Bluetooth Glucometer Integration

Standard insulin pens keep no dose history, so doctors see glucose readings without the insulin doses that explain them

The client works in diabetes care, and this project focused on people who inject insulin with a pen and check their blood sugar with a glucometer. For many of them, both routines happen several times a day.

Each device does its own job well. The pen delivers a measured dose, and a Bluetooth glucometer can already send its readings to a phone. The trouble is that only the glucometer keeps a record.

Without a record from the pen, the dose history depends on the patient’s memory or a handwritten logbook. A missed or doubled dose shows up hours later as a glucose reading out of range, and nothing in the data explains it.

That leaves the doctor with half the picture. To adjust insulin therapy, they need to know what the patient injected and when, and a glucose log can’t answer that on its own.

The client asked Yalantis to prototype a system that records every dose automatically and brings it together with the patient’s glucose readings. The plan combined a clip-on module for the pen with a patient app that collects data from the module and a Bluetooth glucometer. The app would also send reminders, and the doctor would get a view of the same dosing and glucose history.

A clip-on module and a Bluetooth glucometer send their data to one patient app, and the doctor sees the same history

The prototype serves two audiences. Patients use the app day to day, and the doctor uses the same records to review treatment.