Is the camera or mirror more accurate?

I look fine in the mirror, even when I go up close etc.

Sometimes I even look at myself through my iPhone camera, and I look fine.

But when I snap a picture of myself with my phone, no angle, (is that the right term?) I notice I look a bit different. For example, I notice that one of my eyebrows is longer on the inner part. This confuses me because in the mirror and before I take the picture, I look perfectly fine.

Is the mirror or camera more accurate?

I guess you have not searched the thousands of answers to this exact question using the search answers tool.

Your iPhone uses a wide angle lens and thus any photograph of you will show distorted facial features.

Portrait photographs are shot using a medium telephoto lens to reduce distortion of people faces.

I'm sure you would have eventually figured this out had you thought about it, knowing that all mobiles use wide angle lenses and that wide angle lenses cause distortion

A mirror shows you a REVERSED image of yourself. Because you see yourself in a mirror most of the time, it's the face you are most familiar with.
A Photo shows a TRUE image of you… The one everyone else sees. You think you look different because you do not see many photos of yourself compared with looking in a mirror.