Looking at your apple texture, @RedPhantom is right, that's just not going to line up the way it is right now.

You can see on the one half you've got two light spots, with a dark spot in the middle near the pole, on the other half, you've got almost the opposite of that, two darker areas with a lighter spot at the pole. That's going to make for a very obvious seam.

You can fix it pretty easily in Blender with the texture painting tools, focus on the seam areas, you shouldn't have any problem painting that out. Just a matter of some color picker and painting, shouldn't take more than a few minutes to clean up.

You could also, flip the UV layout for one half, over lap the two halves in the UV layout, making sure that corresponding points along the seam line up. This will give you a mirrored texture for the two halves, not ideal, but an option, and it will sort out the seams.

Alternatively, and this is a LOT more laborious process, you can create a second UV map for your object [doesn't have to actually be the whole object, just the seams, and enough space either side to work with], changing where you put the seams, so that the seams on the second UV map are different from the first. Then bake off your textures from the current UV layout/texture set, to the new UV layout. Since the seams are different, you'll have the problem areas from your current texture at a place where you're able to work on them on the new texture. Paint them out, then reverse the process, baking the cleaned up seams back to your original UV layout. Not sure I'd go this route given the relative simplicity of the objects and textures in this case, I think the texture paint in Blender would be good enough, and far far quicker.

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