Smartwatches

Two decisions cover most of this category.

Phone compatibility comes first. An Apple Watch works only with an iPhone — there is no Android support at all, and that catches people out. Most other watches work with both, though some features may be limited on one platform. Check before anything else.

Full smartwatch or fitness tracker. A smartwatch runs apps, takes calls, shows and replies to messages, and pays contactlessly. A fitness tracker focuses on steps, heart rate and sleep, and in exchange is lighter, cheaper and lasts far longer between charges — days or weeks rather than roughly one day.

On Apple Watch specifically, the tiers are: SE for the core features at the lowest price, the numbered Series for the full feature set and the always-on display, and Ultra for the largest battery and outdoor use.

GPS versus GPS + Cellular: the GPS model needs your phone nearby for data; the cellular model has its own connection and needs a plan from your network.

See also bands and straps.