Spots on my Apples

Hello, I can see in your first picture that the leaves at the left bottom of the picture got the same damage. Check the leaves for bugs, they mostly hide at the bottom of the leaf. You can use a loop to determine what bugs are the issue here. From there you can choose the best (organic) method to solve this issue.

It does appear to be bug damage. Your best tool is to get a magnifier and check the leaves. Most bugs reside on the bottom of the leaf. My outdoor plants get a hefty application of neem oil. I apply regularly until I start seeing bud formation. I usually only have an issue with Japanese beetles when I do this. If you do find any bugs or eggs on the bottom of the leaf. It’s best to remove that leaf and spot check the entire plant if you can. Hope this helps.

if that black spot was ever shiney, there's some mold that looks like that. When i've seen it it's one spot, i remove it and it doesn't spread easily, at least indoors. the light spots do look like something is suckling on the leaves, though. outdoor stuff is an adventuree.

the damage appears to be following the veins on the leaves, working from the tips to the base. its not typical of mite or thrip damage from what I have seen in my time, but good advice to check on the underside of the leaves like asnoriu said. This looks like something is off in the roots or topical on the leaf. It won't let me load your diary as GrowDiaries is breaking apart daily, but I would check if your mixing your nutrients right. They should not be cloudy at all. I don't know what PC measurements are, PH? EC? Just based on leaf symptoms it is similar to Calcium or Phosphorus, I would like to load the diary to confirm somethings but I can't. Ensure you are feeding them enough and getting adequate runoff. Good Luck!

maybe thrips ? check bottom of damaged leaf with magnifying glass.