IFTTT is a free online tool that allows you to create "recipes" with which to automate tasks. It is very easy to integrate InstagramTweet with IFTTT so that every time you publish a video or a photo in Instagram, it is shared on your Twitter with the great InstagramTweet look. If you still do not know what InstagramTweet offers you and why it is the best option to share your Instagrams on Twitter, click here. But in short: your posts will look great with a large preview image, linked directly to your Instagram.
If you're more familiar with other social network automation tools such as Hootsuite or Sprout Social, or you want to share other Instagram accounts' posts (as long as they are public), you can benefit from all the benefits of InstagramTweet using the Instagram feed of any Instagram account.