What is Water resistance?
Water resistance (ATM / IP)
5 ATM means swim-safe; IP68 means splash and rain only.
Short answer
IP68 is not the same as 5 ATM.
Water resistance when buying a smartwatch & fitness band
5 ATM means swim-safe; IP68 means splash and rain only.
Why it matters: Swimmers must have 5 ATM; IP68 watches fail in a pool.
Look for: IP68 is not the same as 5 ATM.
Full Smartwatch & Fitness Band buying guideWater resistance when buying a wristwatch (quartz & automatic)
A pressure test rating, not a diving depth.
Why it matters: 3 ATM is splash only; 5 ATM is showers; 10 ATM+ for swimming.
Look for: Never press buttons or open the crown underwater; seals age — retest every few years.
Full Wristwatch (Quartz & Automatic) buying guide