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Helpful answers
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Sep 14, 2016 3:56 AM in response to sdakby Jonathan UK,Hi
Apple has not disclosed that information within the published technical specifications.
You would need to ask Apple directly:
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Sep 14, 2016 4:24 AM in response to sdakby léonie,I have not seen an "oprating altitude" mentioned for any Apple Watch version, but you should not take the paired iPhone to an altitude higher than 10000 feet. This requirement has been listed for all iPhone models, iPads, ...
for example for the iPhone 5s: iPhone 5s - Technical Specifications
- Operating altitude: tested up to 10,000 feet (3000 m)
You did not ask this, but the temperature requirements are more important and restrictive for the Watch than the altitude. They are the same for all models: https://help.apple.com/watch/#/apd707b42a5e
Operating temperature Apple Watch is designed to work best in ambient temperatures between 32° and 95° F (0° and 35° C) and be stored in temperatures between -4° and 113° F (-20° and 45° C). Apple Watch can be damaged and battery life shortened if stored or operated outside of these temperature ranges. Avoid exposing Apple Watch to dramatic changes in temperature or humidity. If the interior temperature of Apple Watch exceeds normal operating temperatures (for example, in a hot car or in direct sunlight for extended periods of time), you may experience the following as it attempts to regulate its temperature:
- Charging may slow or stop.
- The display may dim.
- A temperature warning screen may appear.
- Some data transfer may be paused or delayed.
- Some apps may close.
I occasionally experience the watch shutting down, when I am in the tropics outside the air conditioned rooms. When it is very hot, the some apps will close, and the temperature warning screen appears. The display will turn off completely.