Swing, rocker or bouncer?
A swing moves the seat for you, on mains or battery power, so it keeps going while your hands are full. A bouncer moves when your baby kicks or you give it a nudge; on budget models the only powered part is a vibration unit. A rocker is rocked by hand, and some products, like the Joie Serina 2in1, combine a swing frame with a lift-off rocker.
Swings help most when you need sustained soothing, but they're bulky and most are outgrown at around six months or 9kg. A bouncer is cheaper and lighter, and some, like the Ingenuity Keep Cozy, convert into a toddler seat, so they earn their floor space for longer.
Which way should it move?
Babies have preferences, and you won't know yours until you try. The Mamaroo combines up-and-down with side-to-side movement; the Maxi-Cosi Cassia and Joie Serina switch between front-to-back and side-to-side; the Munchkin sways side to side; the Graco Baby Delight swings front to back. More motion options mean a better chance of finding one your baby likes, which is part of what you pay for with pricier models.
If you can, try before you buy, and check the returns policy. Argos, for example, excludes the Mamas & Papas Alto from its 30-day money back guarantee.
Mains, batteries or both?
Mains-only swings, like the Mamaroo and Munchkin, tend to live in one room near a socket. The Maxi-Cosi Cassia and Mamas & Papas Alto run on mains or AA batteries, which makes them easier to move around the house. Battery-only models like the Graco Baby Delight (four C cells) have no cable to trip over, but if you use one every day the batteries add up, so rechargeable cells are worth buying.
Smart features: handy, not essential
Bluetooth speakers, remotes and apps let you change the speed or the music without leaning over your baby, which is genuinely useful. The Mamaroo works with the UPPAbaby app, Alexa and Google Home; the Munchkin and Alto come with remotes; and the Cassia starts swaying on its own when it senses your baby getting fussy. Graco also makes an Eluma Sway with cry detection, but it was out of stock on Graco's UK site when I checked.
None of this changes the golden rule: a swing is for supervised awake time, and a sleeping baby belongs in their cot.
Buying second-hand
Swings make good hand-me-downs, as long as you check a few things. Get the manual (most are online), make sure every strap and part is there, and search 'product recalls' on gov.uk. If you're offered an older 4moms mamaRoo, check the model: in 2022 around two million older mamaRoo swings with three-point harnesses were recalled in the US and Canada over a strap entanglement risk for crawling babies, with a free strap fastener as the fix.