ScreenTray is described as 'A macOS app for capturing, annotating and sharing screenshots. Quickly add comments, highlight what matters or blur any sensitive content. Upload screenshots to Google Drive or Dropbox. Copy screenshots to the clipboard and paste them directly into Slack, Skype, Jira, Trello and' and is a screenshot capture tool in the photos & graphics category. There are more than 100 alternatives to ScreenTray for a variety of platforms, including Windows, Mac, Web-based, Linux and Google Chrome apps. The best ScreenTray alternative is ShareX, which is both free and Open Source. Other great apps like ScreenTray are Flameshot, Greenshot, Ksnip and PicPick.