DeVilbiss iGo2 Vs. Freestyle Comfort Portable Oxygen Concentrator

The DeVilbiss iGo2 and the Caire Freestyle Comfort are both portable oxygen concentrators designed for use while on the go. These units are both very reliable and have great features, including long battery life, a lightweight design, and more. Let's review more about these portable oxygen concentrators.

Design Comparison 

CAIRE Freestyle Comfort Portable Oxygen Concentrator

Caire FreeStyle Comfort Portable Oxygen ConcentratorCaire FreeStyle Comfort Portable Oxygen Concentrator

The Caire FreeStyle Comfort™ Portable Oxygen Concentrator is an ergonomically-designed portable oxygen concentrator, designed with compactness in mind. This device rests perfectly against the patient's body’s natural curves, making it highly comfortable to use. The compact design makes it easy to pack in any suitcase or overnight bag. Additionally, to make travel even easier, the Caire Freestyle Comfort comes with a shoulder strap and carrying bag to ensure your device is secure and protected.

Drive Medical iGO2 Portable Oxygen ConcentratorDrive Medical iGO2 Portable Oxygen Concentrator

The DeVilbiss iGo2 Portable Oxygen Concentrator is designed to be highly portable with a compact shape for easy transport. Weighing only 15.5 pounds without battery and 19 pounds with battery, this portable oxygen concentrator delivers smart and useful features for oxygen therapy on the go, including a user-friendly interface with an easily readable battery life gauge and openings for the nasal cannula and external power supply that are easily accessible even with the rolling carrying case.

Technology Comparison

CAIRE Freestyle Comfort Portable Oxygen Concentrator

The Caire FreeStyle Comfort has many technological features, including 13 system alarms to warn users that something may be wrong with their device. These alarms alert users when it does not detect a user's breath, external power failure, high/low operating temperature, and overall system failure. Patients will know something is wrong as each alarm will sound on the device. When a problem occurs, it will also be displayed on the screen using an alert icon.

Additionally, the award-winning FreeStyle Comfort Portable Oxygen Concentrator has a very user-friendly interface. The screen of this machine is large, making it easy for all users to read things like their battery status, alarm notification, oxygen settings, and more. This advanced machine can deliver oxygen in 5 different pulse dose settings, from 210mL per minute to 1,050mL per minute, making it ideal for many users and their unique settings. 

DeVilbiss iGo2 Portable Oxygen Concentrator

The iGo2 is unique from most other portable concentrators as it offers both pulse dose and continuous flow settings. This means that users will receive the oxygen therapy they need no matter what. With a pulse dose, oxygen is delivered as individuals inhale. This preserves the battery life of the concentrator and only delivers therapy as it is required. The DeVilbiss iGo2 includes 6 pulse dose settings, which can easily be changed via the Mode Select and Flow Rate buttons on the display panel.

The iGo2 also features SmartDose technology, that automatically adjusts to the oxygen setting of each unique user. Because of this intuitive technology, this device can detect the breathing rate of each user to determine the amount of oxygen they needs while keeping the airflow constant. 

Size and Weight Comparison

CAIRE Freestyle Comfort Portable Oxygen Concentrator

The Caire FreeStyle device is one of the lightest POCs available on the market. It weighs just 5 pounds with the standard battery and an additional pound when the optional extended battery is installed. It is highly portable and able to be brought around with every user, thanks to shoulder strap that comes included. It features a minimal and compact design to be very lightweight, while still being a very effective machine. 

DeVilbiss iGo2 Portable Oxygen Concentrator

Although heavier than the FreeStyle, the iGo2 is still considered lightweight and compact for easy travel and portability. It weighs 15 lbs without the battery and 19 lbs when the battery is in the unit. Although heavier than some, this concentrator has a wheeled cart included to help users bring this device around with them. This results in ease of use and transportation for all users. 

Battery Life and Charging Comparison

CAIRE Freestyle Comfort Portable Oxygen Concentrator

The Caire FreeStyle Comfort Portable Oxygen Concentrator comes standard with an 8-cell battery. The battery can provide between 2 hours (pulse dose setting 5) and 8 hours (pulse dose setting 1) of use, depending on the settings of each user. Patients can also choose to purchase an extended 16-cell battery that will double the life of the concentrator. 

DeVilbiss iGo2 Portable Oxygen Concentrator

The iGo2 comes with a rechargeable lithium-ion battery that can last up to 5.4 hours at a pulse dose setting of 1. Battery life will vary depending on your oxygen settings, so it is important users plan ahead when they know they will need their concentrator for an extended period of time away. Users can also purchase additional batteries and external battery chargers to make sure their device will always operate when they need it to. Charge time is approximately 2 - 4.5 hours, depending on the flow setting. The battery will not charge when connected to DC power.

Noise Level Comparison

CAIRE Freestyle Comfort Portable Oxygen Concentrator

The FreeStyle allows for a quiet operation no matter where the user is. The machine’s sound level is a soft 43 decibels, so you can use it without disruption whether at home, in a restaurant, or other public places. It will also only take less than 2 minutes to start delivering oxygen once the machine is started up by the press of a button. Since this machine is FAA-approved, the low noise level makes it ideal for in-flight use.

DeVilbiss iGo2 Portable Oxygen Concentrator

The DeVilbiss brand is known for making oxygen concentrators that are exceptionally quiet and energy efficient. The portable iGo2’s maximum decibel level is 40, which is only as loud as a whisper, so you don’t need to worry about the hum of your oxygen concentrator bothering you or anyone around you. Additional, the sound this machine produces can also be considered white noise that helps users sleep better. 

Comparison of Oxygen Flow Settings and Output

CAIRE Freestyle Comfort Portable Oxygen Concentrator

The FreeStyle Comfort features both oxygen-conserving technologies and maximum portability. It includes 5 different pulse dose settings, ranging from 210 mL per minute to 1,050 mL per minute. The pulse flow delivery quickly senses when the user breathes in and delivers a pulse of oxygen at the beginning of each inhalation.  It conserves oxygen and extends battery life as opposed to being continuous enough to be carried via the handling flow. This is beneficial when users are away from home for a long time as their battery life is preserved in this type of pulse flow. 

DeVilbiss iGo2 Portable Oxygen Concentrator

The DeVilbiss iGo2 offers both continuous flow and pulse mode options. This device provides continuous oxygen ranging from 1 liter per minute (LPM) to 3 LPM. The iGo2 is equipped with 6 pulse dose settings, which users can easily adjust on the display panel. Please note, a setting of 1 LPM in continuous flow mode does not deliver the same amount of oxygen as a setting of 1 in pulse dose mode. It is recommended to speak with your doctor to determine which mode and which settings may be best for you.

DeVilbiss iGo 2 vs. Caire FreeStyle Comfort Oxygen ConcentratorDeVilbiss iGo 2 vs. Caire FreeStyle Comfort Oxygen Concentrator

DeVilbiss iGo2 Or CAIRE Freestyle Comfort - Which Is Better?

Both portable oxygen concentrators deliver numerous benefits to users, depending on their needs. For those who need the versatility of both continuous flow and pulse mode, the DeVilbiss iGo2 is the preferred option. For those who need only pulse mode and want a design that is lightweight, compact, and ergonomic then the CAIRE Freestyle delivers. The CAIRE is the lighter of the two machines but offers fewer features. You get more unique features with the iGo2 including the highly useful OxyTrack Software which allows you to view performance and usage information. The iGo2 Oxygen Concentrator provides two versions of the software so that both technicians and clinicians can track the usage and performance of this device.

Where Can I Buy the DeVilbiss iGo2 Portable Oxygen Concentrator?

DeVilbiss iGo2DeVilbiss iGo2

The  DeVilbiss iGo2 is available at The Oxygen Concentrator Supply Shop. We offer the additional benefit of expert staff who can help you by answering any questions before your purchase. Our team can also assist with your doctor’s prescription and provide help with any accessories such as nasal cannulas or oxygen tubing that you might need.

Where Can I Buy the CAIRE Freestyle Comfort Portable Oxygen Concentrator?

Caire FreeStyle Comfort Portable Oxygen ConcentratorCaire FreeStyle Comfort Portable Oxygen Concentrator

Much like the iGo2, The CAIRE Freestyle Comfort portable oxygen concentrator is available at The Oxygen Concentrator Supply Shop. Our helpful staff can provide you with answers to all your questions and help you through the entire purchase process. You also will receive free shipping on your order when you buy now. Give us a call at 888-941-1688 or visit us online today!

The author is not affiliated in any way with DeVilbiss or Caire, so the review of these products constitutes publicly-available information by DeVilbiss and Caire. Additionally, this post does not constitute medical advice in any way. It is recommended to discuss the specifics of any oxygen products with your doctor before ultimately purchasing a device to ensure you have the right equipment for your needs. This information is for educational purposes only.

Chris Vasta

Chris Vasta is the president of The CPAP Shop and an expert in sleep and respiratory therapy. He often provides insights on product design and functionality on various manufacturers’ prototypes and is frequently tapped to provide reviews on new releases.