1. Multi-function Calculator

Many people think that the iPhone calculator does not have a delete button, but in fact, it is not, slide one bit to the right to delete.

And it's a super calculator when placed in landscape.

2. Rangefinder

Open the rangefinder in iPhone, you can directly measure the length, width, height and area of the object. And basically there will be no error, much better than the general ruler.

3. Data transfer

Simply turn on this feature on both iPhones, and you can transfer photos to each other without any traffic, and it won't damage the image quality of the photos.

4. Magnifying Glass

This feature is like a telescope to see things in the distance. After turning on this feature, we just need to press the power button 3 times quickly to call up the amplifier of the phone.

5. Limit ad tracking

With this feature on, iPhones can greatly reduce the number of messy ads pushed to the phone, making the phone a lot cleaner. It's easy to turn it on by going to your phone's settings, then opening Privacy, then scrolling down to the bottom, clicking Ads, and then turning on Limit Ad Tracking.