Asked October 23, 2020, 1:27 PM EDT
Mackinac County Michigan
Apples are very difficult to identify with absolute certainty - there are 7500 apple varieties grown in the world with about 2500 different ones in N America and 100 commonly grown commercial varieties. Then there are chance seedlings which add to the list of unknowns. While I know many of the more common varieties, identification will never be exact.
You can use this apple ID website to try to figure it out - http://www.applename.com/ based on the characteristics of the fruit and tree. Another good site to look through is https://www.orangepippin.com/
You could upload some pictures and I can try to help, but keep in mind, it will be an educated guess. Pictures of the tree, leaves, fruit and fruit sliced open longitudinally would be helpful. Information about taste and texture and time of ripening is also helpful.
There are services available in other states and countries to use DNA to identify apples. My understanding is the prices begin in the $500 per sample range so it’s not quite like other DNA testing for humans or pets yet.