Wow, jumbo size. How did you decide to pick it?
My guess cause it was ready
Ok, seriously. ..first sign is the spine that is at the bottom of all developing sapodilla will fall off on its own. You can then do the scratch test. By scratching the outer skin, you want to see a light yellow green to yellow/beige coloration (not a green or vibrant green color). At that time, it can be picked. To know if you picked it at optimal or peak stage, there will be no latex leading from the stem on the fruit. Do not wait for it to get soft on the tree as birds, insects or rodents may beat you to its enjoyment.