02Baby guide, 2 picks compared
Out the Door With a Newborn: One Seat or Two Separate Pieces
Editor's pick Doona+ Car Seat & Stroller
If one piece beats two for the first few months, the Doona+ Car Seat & Stroller is the strongest pick, at the top price tier. It is the car seat and the stroller: lift it out of the car and its own wheels fold down. If you would rather buy two ordinary pieces for less money, the Chicco KeyFit 35 is the budget-friendly starting point, with your choice of stroller handled separately.
Our picks at a glance
- Pick 01Editor's pickDoona+ Car Seat & Stroller
Best for families who want one piece that is both the car seat and the stroller
- Pick 02Budget pickChicco KeyFit 35
Best for a first infant seat bought separately from its stroller
One shell, or two pieces
If you want the fewest decisions and fewest things to carry, get the Doona+. It replaces a separate stroller purchase for the newborn stage: the seat you click out of the car base is the stroller.
If you would rather buy two ordinary pieces and spend less, get the Chicco KeyFit 35 for the seat, then choose any compatible stroller frame on its own terms; our lightweight vs. all-terrain stroller guide covers that decision in full, including the Doona+ itself as a fifth option there.
Either way, the seat is the part the law and the hospital actually check. The National Highway Traffic Safety Administration publishes free seat-check locations and installation help at nhtsa.gov/equipment/car-seats-and-booster-seats; use one before the first drive home, whichever seat you buy.
The picks, compared
| Product | Price Tier | Best For | Buy |
|---|---|---|---|
 Doona+ Car Seat & Stroller | Price tier 4 of 4 | families who want one piece that is both the car seat and the stroller | Check price |
 Chicco KeyFit 35 | Price tier 2 of 4 | a first infant seat bought separately from its stroller | Check price |
The picks, reviewed
01Doona+ Car Seat & Stroller
One piece instead of two
Evidence level for this pick: Handled. Bobby and Nikki used a Doona with one of their kids.
The Doona+ is a rear-facing infant car seat whose own shell folds out stroller wheels, so the seat you click out of the car is already the stroller: no separate frame to buy, fold, or find trunk space for. It is rated for babies 4 to 30 pounds and up to 32 inches, installs with its own LATCH base or on the vehicle belt alone, and Doona states it is FAA approved for aircraft. The tradeoff against buying two ordinary pieces: it is heavier to lift as a seat, and most owners report outgrowing it around a year in, well before its weight limit. Full width, recall and comparison detail against four other infant seats is covered in our small-car seat guide.
- Car seat and stroller in one shell, no separate frame to buy or store
- Installs with its LATCH base or on the vehicle belt alone, per Doona
- FAA approved for aircraft, per Doona
- Heavy to lift as a seat, 17.2 pounds for the Doona+ alone
- Top price tier of anything in this guide
- Reviewers report most children outgrow it around a year in
02Chicco KeyFit 35
Best budget, two separate pieces
The KeyFit 35 is one of the most widely fitted infant seats in the country, which matters for a first-time install because more fire-station technicians and installation videos have handled exactly this seat. Chicco lists it at 16.5 inches wide, rated for infants from 4 to 35 pounds rear-facing, with an anti-rebound bar built into the base. It has one of the largest stroller-compatibility ecosystems of any infant seat, so buying it separately from a stroller is a well-supported path, not an awkward one. Full detail and small-car comparison numbers are in our small-car seat guide; stroller choice is covered in our stroller guide.
- Compact, well-documented base; anti-rebound bar built in, not an add-on
- One of the largest stroller-compatibility ecosystems of any infant seat
- Lower price than an all-in-one shell, with your stroller budget separate
- Two purchases and two things to research instead of one
- No load leg; rear-facing stability relies on the anti-rebound bar, not a floor-braced leg
Buyer FAQ
Does the Doona+ really replace a stroller, or will I still need to buy one?
For the newborn stage, it replaces one. Once your baby outgrows the seat, typically around a year per owner reports, you are back to needing a conventional stroller, the same as anyone whose infant seat ages out.
Is a car seat installed by the hospital or a fire station technician actually checked, or just installed?
Checked. Certified Child Passenger Safety Technicians (CPSTs) verify the installation against the seat's own manual and the vehicle's manual, not just click the harness in; the National Highway Traffic Safety Administration lists free local seat-check stations at nhtsa.gov.
If I buy the pieces separately, does any stroller work with the Chicco KeyFit 35?
No. It needs a stroller frame or full travel system built to accept that specific seat's click-in mechanism; check the stroller's own listing for KeyFit compatibility before buying the two separately.
Evidence level: ResearchedWe did not install either seat ourselves for this guide.
One pick in this guide, the Doona+ Car Seat & Stroller, is Handled: Bobby and Nikki used a Doona with one of their kids. Every other pick is Researched.
What we did, and did not do
- What we did
- Pulled each product's official specs from the manufacturer's own page and confirmed both are currently sold.
- Last verified
- 2 October 2026
This is desk research for the comparison itself. One of the two picks, the Doona+, is first-hand: Bobby and Nikki used one with one of their kids, covered in full in our small-car seat guide and our stroller guide. The Chicco KeyFit 35 is Researched: we did not install it ourselves.
Who wrote this
Bobby and Nikki Wiltgen. Married ten years, together sixteen. We run weddings, events, restaurants and short-stay rentals, and we are raising three kids. We label how we know on every post. Read our evidence standard, or more about us.
