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Inogen vs. Caire vs. ReadyO2 Which POC Is Better?
By
Jonathan Reed
Updated January 20, 2025

Inogen vs. Caire vs. ReadyO2 Which POC Is Better?

Inogen, Caire, and ReadyO2 all have competing models of oxygen concentrators. Here is a detailed review of the different POC models from the three companies.
Product Specialist: Emma Clark
Clinical Applications Specialist: Dr. James Bennett

Patients under medical oxygen therapy have the convenience of mobility and don't need heavy gas tanks —thanks to the innovation of Portable Oxygen Concentrators (POC).  

Today, you can benefit from many years of improved oxygen device innovations. There is an array of options available from different suppliers, unlike in the era of oxygen tanks, liquid oxygen tanks, and stationary oxygen concentrators. 

We have conducted in-depth research on different POCs from leading suppliers, such as Inogen, Caire, and Readyo2. Based on customers' experiences and reviews and through practical testing of the products, we believe we can give a detailed comparison of these models. Here are the details to help you decide between Inogen, Caire, and Readyo2.

 

Our Top Two Picks?

Our top two picks are Inogen Rove6 and ReadyO2 Pro. These two models are small and will give the patient medical-grade oxygen at home or on the go. ReadyO2 Pro comes at a much lower price than its companion.

Here is a brief overview of the two models we pick most.

Our Top Picks?
Best Compact Design
Inogen Rove6 140140
Inogen Rove6
  • Long battery hours
  • Six flow setting
  • Designed for 24/7 use
Best Value for Money
Inogen Rove6 140140
ReadyO2 Pro
  • Most economical
  • Lightweight
  • Fast charging

A Quick Look At the Models We Choose to Compare

inogen Rove6 100100
Inogen Rove6
$2,995
Best Compact Design
inogen G5 100100
Inogen One G5
$2,995
Best Battery Life
caire comfort 100100
CAIRE Freestyle Comfort
$2,995
Best in Smart Technology
readyo2 pro 100100
ReadyO2 Pro
$1,990
 Best Value for Money

Inogen VS. Caire VS. ReadyO₂

1. Inogen Rove6

inogen rove 6 220220
Price: $2,995

Inogen Rove6

  • Weight: 4.8 lbs.
  • Dimension: 8.15" x 7.19" x 3.26"
  • Battery life: 6.25 hrs
  • Oxygen Concentration: 96%
  • Sound level: 39 dBA*
  • Altitude: Up to 10,000 feet
  • Flow settings: Pulse dose (6 settings) 1,260 ml/min
  • Warranty: 3 Years on Unit, 1 year on power supply, battery, & Sieve
Inogen Rove6 has a compact design that delivers a high level of oxygen output. The product also has a long battery life, with an extended life using a dual battery.
Best compact design
A higher number of flow-setting
High level of oxygen output
It's the most costly
Longer battery charge time

Our experience with the Inogen Rove6 model:

The Inogen Rove6 Portable Oxygen Concentrator is a small, powerful oxygen system with a compact design that offers unparalleled performance. It has customizable six-pulse flow settings and conforms to all applicable FAA requirements for use during air travel. 

The Inogen Rove6 costs $3295. It also comes with Bluetooth to connect with the Inogen Connect App on your mobile device.

The design is the most compact and has a high level of oxygen output. Inogen's innovations are at the top, with the devices offering an extra flow rate for patients with higher demand for oxygen levels.

2. Inogen One G5

inogen-G5-220220
Price: $2,995

Inogen One G5

  • Weight: 4.7 lbs
  • Dimension: 7.19’’ x 3.26’’ x 8.15’’
  • Battery life: 6.5 Hrs single battery; 13 Hrs double battery
  • Oxygen Concentration: 90% to 96%
  • Sound level: 38 dBA at setting 2
  • Altitude: Up to 10,000 feet
  • Flow settings:  Pulse (6 settings) 1260 ml/min
  • Warranty: 3 Years on Unit, 1 year on power supply, battery, & Sieve
Product star rate (5)
Inogen One G5 has the best battery life. Their single battery option is capable of lasting up to 6.5 hours. The model also comes with an option of a double battery that can last up to 13 hours.
The best battery life
Higher oxygen output
Versatile flow settings
Higher price than competitors
Longer battery charge time

Our experience with the Inogen One G5 model:

At only 4.7 pounds, Inogen G5 is a lightweight POC. They have an option of 24/7 use, including sleep. It has the longest life of up to 6.5 hours on a single battery. Its double battery can last up to 13 hours. The long battery life makes Inogen G5 the most suitable for use outdoors.

The model offers a higher flow rate with higher oxygen output for longer. You can use the model for long hours outdoors with a double battery.

3. CAIRE Freestyle Comfort

Caire-comfort-220220
Price: $2,995

CAIRE Freestyle Comfort

  • Weight: 5-6 lbs
  • Dimension: 10’’x 7.3’’x 3.1’’
  • Battery life: Single 8 Hrs; Double 16 Hrs
  • Oxygen Concentration: 95%
  • Sound level: 39.9 dBA*
  • Altitude: Up to 10,000 feet
  • Flow settings: Pulse dose (5 settings) 1050ml/min
  • Warranty: 3 Years
Product star rate (3)
CAIRE Freestyle is innovative in technology to ensure saturation. Caire's Freestyle Comfort POC has four patented tech solutions.
AutoSAT for automatic titration according to a patient respiratory rate.
AutoDOSE: It detects the absence of breath and gives Automatic pulse delivery.
UltraSense: for sensitive breath detection.
Mycare: A Telehealth solution.
Supports multiple smart technologies
Longest battery life
Longest warranty
Larger in dimension, especially its height
Still higher in price

Our experience with the CAIRE Freestyle Comfort model:

The model comes in ergonomic shape and is lightweight at 2.3kg (5.07 pounds). It meets FAA guidelines for all commercial air travel. Caire Freestyle Comfort uses improved Utrasense technology to deliver oxygen. Caire also offers lifetime support for their Freestyle comfort POC.

The model has the best innovative technology and offers a variety of solutions to its users using apps. Caire Freestyle Comfort's battery life is among the best. Their ergonomic design makes the model feel more comfortable when it is around.

4. ReadyO2 Pro

readyo2 pro 220220
Price: $1,990

ReadyO2 Pro

  • Weight: 4.37 lbs.
  • Dimension: 7.2’’×3.4’’×7.8’’
  • Battery life: 4.5 Hrs
  • Oxygen Concentration: 96%
  • Sound level: 48 dBA*
  • Altitude: Up to 16,400 feet
  • Flow settings: Pulse dose (5 settings) 200 ml-1000 ml/min
  • Warranty: 2 Years on unit, 1 year on power supply, battery, & sieve
Product star rate (1)
Between Inogen vs. Caire vs. ReadyO2, ReadyO2 Pro has the lowest price, less than $2000. The model is also the most lightweight at 1.9kg (4.37). The supplier guarantees an oxygen delivery of up to 96%.
High level of oxygen concentration
Lightweight
Pocket-friendly at only $1,999
Shortest battery charging time
Highest operating altitude
Short battery life

Our experience with the ReadyO2 Pro model:

At only $1,999, ReadyO2 Pro offers the best value for money. It delivers between 90% and 96% pure oxygen in pulse doses, has a five-pulse flow setting, and naturally matches humidity without needing water. The model also has the lowest price and the lowest charge time.

 The brand is compact and lightweight. It has an oxygen output of higher concentration and is the best option in any humidity and altitude.

Inogen vs. Caire vs. ReadyO2 Comparison Chart

Here is a side-by-side comparison of the four portable oxygen concentrators models.

Inogen vs. Caire vs. ReadyO2 Comparison Chart

Performance Comparison

Comparing Inogen vs Caire vs ReadyO2 in terms of performance, we will use the following criteria:

Oxygen Output and Flow Rates

The leading supplier in terms of oxygen output and flow rates is Inogen. Their products deliver up to 1260ml of concentrated oxygen using six flow rate settings. 

Caire is the second with their Freestyle Comfort model, which delivers a maximum oxygen output of 1050ml using five flow rate settings. ReadyO2 Pro delivers a maximum oxygen output of 1000ml using five flow rate settings.

Battery Duration and Recharge Time

Caire Freestyle Comfort has the longest battery duration on a single battery, followed by Inogen's models. ReadO2 Pro has a lower battery duration, but its two-hour recharge time is the best.

Noise Comparison in Different Settings

All the models have a reduced noise level, allowing peaceful use even during sleep. They all operate at below 50 dBa. However, InogenOne G5 has the lowest noise level at 38dBa.

Portability: Weight, Size, and Ease of Travel

Inogen, Caire, and ReadyO2  have developed POC models that are compact, portable, and lightweight. The differences in dimensions are minimal, the same as their weight.

These suppliers' products consider the users' mobility and provide accessories for easing a patient's movement.

Pricing Comparison

The Price Range For Each Brand's Key Models

ReadyO2 is the most competitive, offering less than $2000. Inogen Rove6 is the most expensive in the range, costing more than $3000.

Affordability and Value For Money

All the products under comparison will give you value for money. But if you are operating on a small budget. ReadyO2 Pro is the most affordable and offers sides the best value for money.

Warranties and Maintenance Costs

Medical equipment and machines for sale must meet FDA approval, and all models here must qualify. Caire offers the most extended warranty while the rest have a warranty of up to 3 years. RaedO2 Pro has a lower maintenance cost due to the design and the material used in its product.

Pros and Cons of Each Brand

As manufacturers, Inogen, Caire, and ReadyO2 have advantages and disadvantages. Here outline the pros and cons of each brand:

Inogen-vs.-Caire -vs.-ReadyO2-Comparison-Chart

Conclusion

Acquiring a portable oxygen concentrator requires a doctor's prescription. However, depending on a patient's diagnosis and budget, you can choose a specific brand. You must discuss the brand choice with your doctor to see if it meets your needs and lifestyle.

The products above are all suitable for patients needing medical oxygen therapy. They are all good for travel and medically stable. However, ReadyO2 offers the best value at the lowest price: $1999.

The best brand for patients needing very high oxygen output is Inogen. If you want a model with a longer battery life, you should go to Caire Freestyle Comfort. But if you are working on a low budget and seeking value for your money, ReadyO2 Pro is the best.

I am Dr. Jonathan Reed, a proud member of the readyO₂ team. With a background in respiratory therapy, I’m dedicated to helping those in need by answering questions and providing clarity. I strive to educate and inspire our audience by making complex topics accessible and engaging. My goal is to educate and inspire our audience, ensuring they have the information necessary to make informed decisions about their health. It’s a privilege to support individuals on their journey to better breathing and well-being.

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