The best alternatives to Twin Science Games are Quick Code, (Not Boring) Habits, and Kalam Labs. 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
QuickCode is a place for free courses on web development, mobile development, big data, machine learning, database, data science, chatbot, cryptocurrency.
Combine the behavioral science of learning habits with a fun, beautiful game to not just track habits but to *build* them. Every day you take a step along a wondrous journey to master a positive habit or slay a bad one.