Flash Fiction Magazine offers a Flash Fiction Masters feature where for $25/month you can get personal feedback on a new flash story every month (or $20/month, if you pay for a year in advance). Plus, you can be part of a closed Facebook group where members share drafts and get detailed feedback to hone their craft before submitting.

For those who don't want that level of commitment, Flash Fiction Magazine also offers Priority Submissions where for $30/story you can get in-depth feedback on your story from their editors. #Feedback