The best alternatives to SplitMoji are Emoji Me Face Maker, Gifmojo, and Emojify. If these 3 options don't work for you, we've listed a few more alternatives below.
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AssemblyAI— Multilingual Speech-to-Text API with superhuman accuracy
Emoji Me Face Maker are custom made emojis that send kisses, wink, smile, laugh, facepalm and many more movements. The cool thing about them is that all that is made by your own character and you can send them in iMessage or other messaging platforms.