Our pick for most families~6 months (sitting) to 10 years as a chair
Anko (Kmart / Target Australia) 2-in-1 Highchair
Adjustable footrest, removable tray and five-point harness at a mid price, then a toddler chair until 10.
You will need a highchair once your baby can sit up with little support and is ready for solids, usually around 6 months. What matters most: a five-point harness you will actually use, a stable base that does not tip, and an adjustable footrest so feet are supported and your baby sits upright, not reclined. In Australia highchairs are tested against AS 4684; CHOICE's lab testing found some cheap chairs outscoring expensive ones, so price is not a reliable guide. Then think about cleaning: fewer cracks and crevices, a tray that comes off, and padding you can wipe. Bibs, a small open cup and baby spoons are the only other gear you really need to start.
Our pick for most families~6 months (sitting) to 10 years as a chair
Adjustable footrest, removable tray and five-point harness at a mid price, then a toddler chair until 10.
Budget pick~6 months (sitting) to 3 years
The lightest, cheapest, easiest-to-hose-down highchair — with no footrest and a simple belt.
Premium pick~6 months (with Baby Set) into adulthood
A beech chair with an adjustable seat and footrest that pulls up to your table and lasts into adulthood.
Also good~6 months (sitting, starting solids) to 3 years
A height-adjustable bamboo footrest, with optional cushion and mat, that gives the IKEA ANTILOP foot support.
Also goodAround 6 months (starting solids) to ~3 years
A refillable, non-squeeze bottle for puree and yoghurt on the go. Handy for outings, not a swap for the spoon.
Also goodStarting solids (~6 months) until your child leaves the highchair
A wipe-clean catcher that fits around the ANTILOP, Tripp Trapp and others so dropped food stays off the floor.
Price bands for this category: $ < $50 · $$ $50–200 · $$$ $200–450 · $$$$ > $450. Prices change — check the retailer.