How Omnipod Works: Pod, Controller and CGM Explained

Omnipod is a tubeless insulin pump system. You wear a small Pod on your body that holds insulin and delivers it through a tiny flexible cannula. You control it from a handheld controller or a compatible phone app. With Omnipod 5, the Pod also talks to a continuous glucose monitor (CGM) and adjusts your insulin on its own every few minutes. You still give the insulin for meals yourself.

This guide covers each part, step by step, in plain words. It also answers the questions people ask most, like how much insulin a Pod holds and whether you can sleep with one.

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TL;DR

The Pod is a tubeless, waterproof pump you wear on your skin. It delivers insulin through a small, flexible cannula and takes commands from a controller or app.
Omnipod 5 reads your CGM value and trend, then raises, lowers or pauses insulin every 5 minutes based on your Target Glucose.
You still give mealtime boluses yourself through the app or controller.
One Pod holds up to 200 units of U-100 rapid-acting insulin (85 units minimum) and is worn for up to 3 days.
If you have unopened Pods left over after a prescription or device change, we buy eligible ones for cash in Orlando.

What Omnipod is
The three parts of the system
How automated insulin delivery works
What you still do yourself
How much insulin a Pod holds and how long it lasts
Wearing it day and night
What the research says
Our perspective
Have unused Omnipod Pods or other supplies in Orlando?
FAQ
Sources

What Omnipod is

Omnipod is made by Insulet. The company describes it as continuous insulin delivery through a tubeless, waterproof pump called a Pod, with no daily insulin injections. There is no tubing running from your body to a pump clipped to your belt. Everything that touches your body is in the Pod.

There are two main ways people use the system:

Pod therapy with a controller. You program basal rates and give boluses yourself.
Omnipod 5. This is an automated insulin delivery (AID) system. Insulet calls it the first wearable, on-body, tubeless AID system. It has a Pod and the Omnipod 5 App, which runs on an Insulet-provided Controller or a compatible smartphone.

Most people searching for Omnipod today mean Omnipod 5, so most of this guide follows it.

Who it is for

Omnipod 5 is indicated for use with NovoLog, Humalog and Admelog (U-100 rapid-acting insulin). It is intended for type 1 diabetes in people 2 years and older and type 2 diabetes in adults 18 and older. The American Diabetes Association’s consumer guide gives the same age ranges.

The FDA first cleared Omnipod 5 in January 2022 for people 6 and older with type 1 diabetes. It extended clearance to children 2 and older in August 2022, then cleared it for adults with type 2 diabetes in August 2024, as reported by Drug Topics.

Your endocrinologist or diabetes care team decides whether a pump is right for you and how to set it up. Ask them before you change any therapy.

The three parts of the system

Omnipod 5 has three parts that work together.

Part	What it does
Pod	Holds the insulin, sits on your skin, inserts the cannula and delivers insulin
Controller or phone app	Sends commands to the Pod, shows glucose and insulin information, lets you give boluses
CGM sensor	Reads glucose and sends values to the Pod

The Pod

The Pod is a small device you fill with insulin and wear directly on your body. It receives delivery instructions from the controller and delivers insulin through a small cannula.

The American Diabetes Association lists the Pod at 1.53 x 2.05 x 0.57 inches and 0.92 oz. You can place it almost anywhere you would give an insulin injection. The cannula inserts automatically and is not visible, so you do not insert a needle by hand.

The Pod is waterproof with an IP28 rating, which covers depths up to 25 feet (7.6 meters) for up to 60 minutes. The Controller is not waterproof. Both points are in the technical user guide.

The Controller or app

The Omnipod 5 app comes preloaded on an Insulet-provided Controller or can be used on a compatible smartphone. It sends commands to the Pod and shows your glucose and insulin information. You use it for meal and correction boluses.

The SmartBolus Calculator is built into the app. Omnipod says it is the only AID system whose built-in calculator automatically uses your CGM value and trend when suggesting a bolus dose.

The CGM

Omnipod 5 works with the Dexcom G7, FreeStyle Libre 3 Plus and FreeStyle Libre 2 Plus sensors. Dexcom is discontinuing the G6. Omnipod says it will keep supporting G6 integration for as long as the sensor remains available.

The pieces connect over Bluetooth wireless technology. The Pod receives glucose values from the CGM sensor and sends them to the app. The app sends commands to the Pod.

How automated insulin delivery works

The automation in Omnipod 5 is called SmartAdjust technology. Here is what happens in plain steps:

Your CGM sends a glucose value and trend to the Pod.
The algorithm predicts where your glucose is heading, up to 60 minutes ahead.
Based on that prediction and your Target Glucose, it increases, decreases or pauses insulin.
It repeats this every 5 minutes, all day and night.

The American Diabetes Association calls this a tubeless hybrid closed-loop system and notes that meals still need manual boluses. “Hybrid” means exactly that split: the system handles background insulin, and you cover food.

What the algorithm looks at

When it makes an adjustment, the algorithm takes into account insulin on board, the sensor glucose value and trend, the adaptive basal rate and your chosen Target Glucose.

The adaptive basal rate is recalculated at every Pod change. It uses a decaying weighted average of your total daily insulin, giving more weight to the last 4 to 5 Pods. The system can deliver up to four times that rate to address high glucose, according to the same Omnipod clinician page.

Your Target Glucose

You and your care team choose a Target Glucose. The Omnipod 5 setting ranges from 100 mg/dL to 150 mg/dL. The system aims for that number when it adjusts insulin.

Automated Mode and Manual Mode

The system has two modes, described in the technical user guide:

Automated Mode adjusts insulin every 5 minutes using CGM data and your Target Glucose.
Manual Mode delivers insulin from basal programs you set, with no automated adjustment.

The SmartAdjust algorithm runs from the Pod itself. Diatribe reports that the system was designed so you can stay in Automated Mode if your phone or controller is out of range or out of battery.

The first Pod is more cautious

On your first Pod, Automated Mode can start right away, but maximum automated delivery is limited as a safety measure. After 48 hours of wear and a following Pod change, SmartAdjust uses your delivery history to set the adaptive basal rate and removes the initial restraints. So the system gets more personalized as you go.

What you still do yourself

Omnipod 5 reduces daily manual work, but it does not run without you. You will still:

Count carbs and give a bolus for meals through the app or controller.
Give correction boluses when you choose to.
Fill a new Pod and change it on schedule.
Keep a CGM sensor active and replace it when needed.

If you want a refresher on how background and mealtime insulin fit together, our guide to basal-bolus insulin explains it simply.

How much insulin a Pod holds and how long it lasts

A Pod can be filled with up to 200 units of U-100 rapid-acting insulin, with a minimum fill of 85 units. You can wear it for up to 3 days (72 hours). Insulet’s pharmacy page says the system replaces up to 14 injections over that wear time.

So a typical cycle looks like this:

Fill the Pod with at least 85 units of insulin.
Place it on a site you would use for an injection.
Start delivery from the app or controller.
Wear it for up to 72 hours, then replace it with a new Pod.

Your care team will tell you how many units to fill based on your needs. The Omnipod 5 system also stores up to 90 days of information, including automated insulin delivery and sensor glucose values every 5 minutes, which is useful at clinic visits.

Wearing it day and night

Can you sleep with an Omnipod?

Yes. The Pod is small, sits on your skin and can be worn under clothing. Insulet’s senior director of corporate communications said SmartAdjust helps keep glucose in range even while sleeping. Because adjustments happen every 5 minutes without you doing anything, overnight is one of the times people notice the automation most.

Showering and swimming

The Pod’s IP28 rating covers up to 25 feet for up to 60 minutes. Keep the Controller dry, since it is not waterproof.

What the research says

In a pivotal trial presented at the American Diabetes Association meeting in June 2024, 305 adults aged 18 to 75 with type 2 diabetes were studied. Mean time in range (70 to 180 mg/dL) rose from 45% on standard therapy to 66% at 13 weeks on Omnipod 5, per the Insulet document.

Healio reported that in the SECURE-T2D trial, HbA1c fell from 8.2% to 7.4% at 13 weeks. Results differ from person to person, so talk with your care team about what to expect for you.

Our perspective

We talk with people every week who are changing diabetes devices. Some move to Omnipod 5. Some switch CGMs. Others change insurance plans or prescriptions and end up with boxes they will never open.

What we see is that a good pump setup needs steady, on-time supplies. Pods are filled and changed about every 3 days, so a month’s supply adds up quickly. When a plan changes or a device is swapped, leftover sealed supplies are common.

That is where we come in. We are a local Orlando buyer. We meet you in a safe, public place, check eligible unopened items in person and pay on the spot. There is no shipping and no waiting on a mailed package.

If you are switching to Omnipod 5 and have leftover sealed supplies from your old setup, you can turn them into cash that helps cover your new one. Our guide to why people switch CGM devices explains how common this is.

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Have unused Omnipod Pods or other supplies in Orlando?

If you moved to a different pump, changed prescriptions or received more than you can use, we can help. We buy eligible unused, sealed and unexpired diabetic supplies in Orlando and surrounding areas, with in-person inspection and same-day payment.

Start with our page on Omnipod Pod buyback, or read how to check unused Omnipod Pods before you sell, donate or keep them. You can also see everything we buy on our main page. For Dexcom G7 sensors, our Dexcom G7 buyback page lists what we pay, and our overview of diabetes tech categories explains how pumps, pods and CGMs fit together.

FAQ

Is Omnipod the only tubeless insulin pump?

Omnipod is the best-known tubeless pump, and the Pod design means there is no tubing at all. Omnipod 5 is described by Insulet as the first wearable, on-body, tubeless AID system. Ask your care team which pump fits your needs.

How much insulin goes in an Omnipod?

You fill each Pod with at least 85 units and up to 200 units of U-100 rapid-acting insulin. A Pod can be worn for up to 72 hours. Your care team will help you choose how much to fill.

Does Omnipod 5 work without my phone nearby?

The SmartAdjust algorithm runs from the Pod, so Automated Mode is designed to continue if the phone or controller is out of range or low on battery. You need the app or controller to give meal boluses and view your data.

Which CGMs work with Omnipod 5?

Omnipod 5 works with Dexcom G7, FreeStyle Libre 3 Plus and FreeStyle Libre 2 Plus. Dexcom G6 integration continues while the sensor remains available.