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Coros Apex 4 vs Garmin Instinct 3 Solar
Weight and specs compared for 2026 — and which one to choose.
Garmin Instinct 3 Solar is the lighter option — 12 g lighter than the Coros Apex 4 (19% less weight). If grams matter to you, that is the one to beat.
Coros Apex 4
64 g
Mountain-sports GPS watch (46mm) with dual-band GNSS, titanium bezel and sapphire glass, weight with silicone band.
Check price Full details →Garmin Instinct 3 Solar
52 g
Rugged GPS smartwatch with solar charging, 28-day battery in smartwatch mode, and unlimited battery in expedition GPS mode. Altimeter, compass included.
Check price Full details →Coros Apex 4 vs Garmin Instinct 3 Solar: which should you buy?
If saving weight is your priority, the Garmin Instinct 3 Solar wins — at 52 g it is 12 g (19%) lighter than the Coros Apex 4 (64 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.
See where both rank against everything else in this category on the lightest navigation page, or browse the full gear weight database.