The best alternatives to Kuaiboard 2 are Keysmith, Shortcuts for iOS, and Snipboard. 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
If you are lazy or busy, and don't need to wast time in typing same things again and again, so LazyBoard keyboard for you. LazyBoard save your email templates, canned support replies or anything you type regularly.