Here’s how Apple tests its iPhones for durability and water resistance

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Apple iPhone durability test

  • MKBHD notes that Apple Labs has an entire room of machines for water and ingress testing. These are special machines and are probably custom-designed by the Cupertino giant.
  • There are multiple levels of water spray testing done on iPhones to test how resistant they are before the phones hit the market.
  • In level one, a drip tray is done on iPhones simulating rain. This level has no real pressure, just IPX4. This shouldn’t cause any real damage to the iPhone.
  • The second round shows a sustained, low-pressure jet spray from any angle. This round tests the IPX5 resistance of the iPhone.

  • The third round has a high-pressure spray from a hose (IPX6) onto the iPhone.
  • Lastly, the fourth round has the iPhone locked underwater (IPX8) and there is an added pressure to simulate depth. This is done for an extended time, probably to see how long the iPhone can last without any water damage.

MKBHD says that Apple has a specially programmed industrial robot and this will function as their drop test machine simulator. This will simulate drops from angles onto various materials. There are slow-motion cameras to see the impact of the drop.

Then there is another test, where iPhones are seen shaking at computer-controlled frequencies. This is to see how well the device can hold up to that frequency over time. Apple can program the frequency of a certain motorcycle engine or subway car.

When asked about how Apple connects the dots between controlled environment testing of iPhones and the possibility of various other ways of damaging iPhones by customers in the real world, John Ternus – Head of Hardware Engineering at Apple says, there are a large number of the team members who understand the failure mechanisms and co-relate to a lab test and field.

He sees this as a lot of years of evolution and learning. The company performs multiple tests on any given iPhone (10,000 models) before they are released to the market. There apparently are over 300 tests done. Lastly, Apple iPhones are very tightly sealed from within in order to protect them from any external particles entering inside, including water and this could be why the repairability scores of iPhones are quite low. However, the company appears to be easing on this slightly.

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