To crop photos on your iPhone, you can use the built-in Photos app. Here's how to do it:
1. **Open the Photos App**: Tap on the Photos app icon on your iPhone's home screen to open it.
2. **Select the Photo**: Navigate to the photo you want to crop and tap on it to open it.
3. **Tap Edit**: Once the photo is open, tap the "Edit" button located in the upper right corner of the screen. It looks like three sliders.
4. **Tap the Crop Icon**: In the editing toolbar at the bottom of the screen, you'll see several editing options. Tap the crop icon, which looks like a square with two lines extending from the top and bottom edges.
5. **Adjust the Crop Box**: You'll see a rectangular crop box overlaying your photo. You can drag the corners or sides of the crop box to adjust its size and shape. You can also move the crop box by dragging it with your finger.
6. **Rotate or Straighten (Optional)**: If your photo needs rotating or straightening, you can do this by tapping the rotate icon (a curved arrow) or the straighten icon (a level) in the editing toolbar.
7. **Apply the Crop**: Once you're satisfied with the crop, tap the "Done" button in the lower right corner of the screen.
8. **Save the Changes**: Tap "Save" to save your cropped photo. Your edited photo will replace the original in your Photos library, but you can revert to the original at any time by opening the photo, tapping "Edit," and then tapping "Revert" to revert to the original version.