An Adobe Creative Cloud subscription will get you both Lightroom and Photoshop for less than ten bucks a month ($9.99). Both are superb pieces of image editing software.
Lightroom: Lightroom is ideal for importing, sorting, culling and making simple edits to your photos. It’s really easy to learn, and there’s just nothing better as far as we’re concerned. You can use it to make simple lighting and color adjustments, crop your images, or even remove distracting objects if the background is simple.
Photoshop: The gold standard of image editing software. Photoshop is robust enough to do almost anything to an image if you practice. This is what you use if you want to transfer a face from one image onto another, put in a new sky, make yourself look skinny or clean up those zits.
If you are taking your photography seriously, there is no excuse not to give this subscription a try. After a week of practice the difference will be so noticeable that there will be no going back. After a year you will be able to work miracles.