Losing apple limbs

We just moved to a place with a couple apple trees last year. They had been neglected for not sure how many years, but I did a bit of light pruning in January, and during growing season have applied a couple fertilizers, iron-tone, did a copper spray and fruit-tree spray every few weeks (bonide captain jacks).

Obviously I didn't prune Nearly enough, as I've lost several limbs from the weight of the apples. 4 days I lost a really big one, coming right off the trunk.

I cut it back to about an inch or two from the trunk. I'm wondering if I need to cut it closer. I'm also kinda worried that water will get in where it broke and rot the tree?

Boy have I got a lot to learn about caring for apple trees!

yeah, i don’t like the look of how that wound ended up either. i’d try to clean it up to minimize the ‘cup’ that could catch water.

in the meanwhile, a bit of thinning of apples on branches that could also go down wouldn’t go amiss.

The narrow crotches on the other limbs on that tree wait to break in a wind or snow storm.

Happens to my peach trees every few years. If a limb looks overloaded I prop it with forked sticks, then prune that limb back the following winter.

I cleaned it up as best I can but wonder if I can do anything more to help it not collect water and rot?

I am of the opinion of the less intervention the better. It looks like you have removed any snags so I would leave it for now and see how the tree's natural healing factor comes into play.

Is there a leaf canopy above to help deflect some rain fall?

I've seen concrete used to fill a cup type hole, either waterproof cement or with a waterproof coat over the top.