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It really depends on the apple variety.

In some apples, the woody flavor can mean that the apples are not ripe enough yet and need more time on the tree before being picked. In other varieties, storing them in a cool, dry, dark location for a few weeks will improve the flavor. In almost all varieties though, a woody texture and flavor can indicate that the tree is lacking in water or nutrients.

If you are unsure of the variety, you may need to experiment with a few. Leave some on the tree and store a few and see if either improves the flavor and texture. If neither do, then next year, make sure the tree is properly fertilized and receives enough water to avoid this problem.

I am personally fond of neem oil for this as it is both a pesticide and fungicide and is food safe organic. Plus it has no effect on honeybees, so can be used during blossom time.

This article will help with the spray schedule:
https://www.gardeningknowhow.com/edible/fruits/fegen/fruit-tree-spraying.htm

This article will help with fruiting issues: https://www.gardeningknowhow.com/edible/vegetables/carrot/no-fruit-on-apple-trees.htm

If you are not getting apples, this article will help: https://www.gardeningknowhow.com/edible/vegetables/carrot/no-fruit-on-apple-trees.htm

It could be the result of apple maggots or some other types of caterpiller/worm. These articles should help: https://www.gardeningknowhow.com/edible/fruits/apples/apple-maggots.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/prevent-caterpillars.htm

Unless it is an unseasonably dry winter, you really do not need to give your apple trees any water. They are normally dormant over winter and do not require much in the way of water. If the trees are not getting enough water from rain or snow and they seem quite dry, you may give them supplemental water.