Coros Apex 4 (42mm with silicone strap) vs Garmin Instinct 3 Solar 45mm
Weight and specs compared for 2026 — and which one to choose.
Rugged mountain sports GPS watch with AMOLED display, up to 85hr GPS battery. 56g in 42mm size, available with nylon strap option (lighter at 51g)
Full details →Rugged solar-powered GPS watch. 36-90 days smartwatch battery with solar charging capability.
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Coros Apex 4 (42mm with silicone strap) vs Garmin Instinct 3 Solar 45mm: which should you buy?
If saving weight is your priority, the Garmin Instinct 3 Solar 45mm wins — at 53 g it is 3 g (5%) lighter than the Coros Apex 4 (42mm with silicone strap) (56 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 electronics page, or browse the full gear weight database.