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Connected insulin pens

Connected insulin pens (also known as smart insulin pens) are injection pens that use replaceable insulin cartridges and record how much insulin you inject and when you inject it. This data can be sent to an app on your phone and can help simplify your type 1 diabetes (T1D) management.
Content last reviewed and updated: 22.12.2025

Currently most people with T1D use a basal-bolus regime also known as multiple daily injections (MDI), mostly using insulin injection pens rather than syringes.

Fortunately, breakthrough technology isn’t just for insulin pump users. If you use MDI, a connected pen can help make your life a little easier.

What is a ‘connected insulin pen’?

A connected insulin pen is a reusable injection pen that records how much insulin you inject and when you inject it. This data can help simplify your T1D management.

Some connected pen systems come as part of a system including an app and sensor, whilst others integrate with a third-party sensor and app.

All connected pen systems can:

  • display data to enable more accurate dosage calculations through a bolus calculator and so ease the mental burden
  • help you avoid missed doses
  • help you avoid overcorrecting high glucose levels.

Connected insulin pen or smart insulin pen?

Some people call connected pens ‘smart insulin pens’. At Breakthrough T1D, we mention ‘smart insulin’ in terms of novel insulin research. We want to make it clear that it’s the pen that is smart with connected pens, not the insulin. Connected pens use the same insulin options as normal insulin pens.

How does a connected insulin pen work?

Connected pens can be used without connecting to an app – like ordinary insulin pens, but the full benefits come by linking them to an app on your smartphone.

For example, if your connected pen is integrated with Glooko and Glooko clinic software, you can upload data from your continuous glucose monitor (CGM). This means you can view your dosing data alongside glucose data uploaded to Glooko’s platform. This can help you spot ways to spend more time in your target glucose range – such as seeing the effect of injecting after a meal rather than 20 minutes before.

This can also provide greater insight to your diabetes care team, so they can see on screen the issues you might want to discuss with them, such as morning highs, or overnight lows. They can then give you tailored advice to help overcome any problems or confirm your need for further treatment options such as hybrid closed loop technology.

Where can I learn more about connected insulin pens?

Pharmaceutical companies are not allowed to advertise directly to users in the UK, and some connected pens are made by insulin manufacturers, so it can be difficult to find information about connected insulin pens. One manufacturer is not a pharmaceutical company but rather a medical device company and is allowed to advertise to users.

However, the Diabetes Technology Network (DTN-UK) has some useful videos about connected pens.

What connected insulin pens are available?

There are a couple of options, and all are available on the NHS. Speak to your diabetes care team to find out what is most suitable for you. More options are expected to become available in the coming months.

  • NovoPen 6 and NovoPen Echo Plus if you use Novo insulin (NovoRapid, Fiasp, Levemir, NovoMix 30 or Tresiba). These pens are compatible with various third-party apps, such as Glooko, LibreLink and Dexcom apps. Each app offers different functions when used with a connected pen.

Novo Nordisk's smart insulin pens

  • InPen if you use Lilly Humalog®, Lilly Lyumjev®, Novo Nordisk NovoRapid®, Novo Nordisk Fiasp® and Novo Nordisk Insulin Aspart Injection, 3mL cartridges. This pen is compatible with the InPen App and Simplera CGM sensors.

How can I get a connected insulin pen on the NHS?

To get a connected pen, you will need to speak to your diabetes care team. Some are available on prescription from your GP, at no extra cost to the NHS beyond standard insulin pens. Others have to be procured by your clinic. This applies in England, Wales, Scotland and Northern Ireland.

Shared stories

Dr Tom Crabtree
Dr Tom Crabtree
Dr Tom Crabtree Diabetes and Endocrinology registrar

Sharing data with smart pens

“If you turn up to clinic with your pen, we can download the data and together review the insulin that you’ve been taking. It bridges a gap between injections and pump for people who are on that journey through technology”

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