A few questions about what you already own. One clear answer: keep what you have, add this, replace this, or don't buy yet.
Where we stop. Ninaix explains what these devices measure and how they overlap. We do not interpret your readings, and nothing here is medical advice.
How the cost is worked out. Three-year totals are calculated here, not quoted by the manufacturers: starting price plus the yearly price times three. Excludes tax, campaigns, price changes, accessories and replacement. USD, US, checked 2026-08-04.
How we make money. Ninaix may receive a commission when you buy through some links. Our recommendation may still be to keep what you have, or to buy nothing.
What is covered. Setup Check currently covers Apple Watch, Oura Ring, Whoop, and starting from no device at all. Garmin, Samsung and the rest are not included yet — we would rather answer four situations properly than eight badly.