The best alternatives to Social Viewer are introduce, Tweetastic, and Klear for iOS. If these 3 options don't work for you, we've listed a few more alternatives below.
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AssemblyAI— Speech-to-Text API with superhuman accuracy
Social Studies is a tech newsletter made for people obsessed with people. It includes recaps of what happened on Tech Twitter every week plus deep analysis using frameworks from Psychology, Economics, and the other Social Sciences.
Small World makes it easy to make new friends and stay in touch with old ones. The app displays your friends' Twitter locations on a map, and it automatically notifies you when you're in the same city.