These are two of the most common pulse-dose portables in the US. Here’s how they compare, using each maker’s current US manual: Inogen Rove 6, Feb 2026 and CAIRE FreeStyle Comfort, MN232-0 B.
Specs side by side
| Inogen Rove 6 | CAIRE FreeStyle Comfort | |
|---|---|---|
| US price, 13 Oct 2026 | $2,795 (Inogen) | $2,415, 8-cell (Rehabmart) |
| Pulse settings | 1–6 | 1–5 |
| Output (mL/min) | 210 to 1,260 | 210 to 1,050 |
| Dosing | Intelligent Delivery Technology (per-minute volume) | autoSAT (default; constant per-breath dose) or traditional |
| Oxygen concentration | 90% (+6/−3%) | 90% (+5.5/−3%) |
| Weight | 4.8 lb standard / 5.8 lb extended | 5 lb single / 6 lb double |
| Size (standard battery) | 7.18 × 3.27 × 8.14 in | 10.0 × 7.3 × 3.1 in |
| Battery, setting 2 | 5:00 standard / 10:15 extended | 4:00 single / 8:00 double |
| Battery, setting 1 | 6:15 / 12:45 | 6:00 / 11:00 |
| Recharge | up to 3 h / 4 h | 3.5 h / 6 h |
| Battery rated life | 500 cycles | 300 cycles |
| Sound at setting 2 | 39 dBA typical | 43.0 dBA max |
| Operating altitude | 0–10,000 ft | −1,250 to 10,000 ft |
| Expected service life | 8 years (sieve beds 1 year) | 5 years |
| Warranty | 3 years (per manual; check invoice) | 3 years (CAIRE) |
| App | Inogen Connect | myCAIRE (lets your provider see usage and settings) |
| FAA | Meets FAA acceptance criteria | Meets FAA acceptance criteria |
Output and dosing: the real difference
The Rove 6 delivers a set volume per minute, divided across your breaths. At 15 breaths a minute, setting 2 gives 28 mL per breath; at 30 breaths a minute, 14 mL.
The FreeStyle Comfort’s autoSAT (on by default) keeps the dose per breath fixed as your breathing rate rises, up to 40 breaths a minute. So total oxygen per minute increases when you’re active. At setting 2, autoSAT gives 21 mL per breath at every breath rate CAIRE lists, 15 to 40 a minute (FreeStyle Comfort manual). You can switch autoSAT off for traditional per-minute dosing.
Which suits you depends on how your saturation holds during activity. Your clinician should test you on the specific device (pulse vs continuous).
Battery
The Rove 6 lists longer runtimes at setting 1 and 2 with either battery. At setting 5, the FreeStyle Comfort single battery (2:00) edges the Rove 6 standard battery (1:45). The full per-setting table is in battery life by model. The Rove 6’s batteries are rated for 500 cycles and the FreeStyle Comfort’s for 300, which matters over years of daily use.
Living with it
- Shape: the FreeStyle Comfort is flatter (3.1 in deep) and CAIRE says it’s light enough to carry on a shoulder strap. The Rove 6 is taller and narrower (7.18 × 3.27 × 8.14 in).
- Noise: Inogen lists 39 dBA typical at setting 2. CAIRE’s newest manual lists a 43.0 dBA maximum at setting 2. The figures aren’t measured the same way.
- Apps: myCAIRE sends usage hours and flow settings to your home care provider. Inogen Connect handles data log transfers and software updates over Bluetooth.
- Not with CPAP: the Rove 6 manual says not to use it with CPAP, humidifiers or nebulizers.
Who should pick which
| You… | Pick |
|---|---|
| Need setting 6 (1,260 mL/min) | Rove 6 |
| Want the longest runtime at low settings | Rove 6 with extended battery |
| Breathe much faster when active, and your clinician confirms autoSAT works for you | FreeStyle Comfort |
| Want the lower price in our check | FreeStyle Comfort |
| Plan on long-term daily use | Rove 6 (8-year service life, 500-cycle batteries) |
Verdict
The Rove 6 is the more capable all-rounder: more output, longer listed battery life, longer rated service life and longer-lived batteries. The FreeStyle Comfort costs less in our check and its autoSAT dosing is a genuine difference for active users, so it’s worth trialling if your clinician agrees. Both fly.
Related: OxyGo NEXT review, best portable oxygen concentrator, FAA rules, renting a POC for travel.
Full reviews: Inogen Rove 6, CAIRE FreeStyle Comfort.