The best alternatives to Langliter are Homeroom, Gmail Summarization, and Influent. 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
An AI–powered reading assistant, that works for email conversations on Gmail, and helps to automatically summarize email threads—highlighting important sentences and, suggesting #labels for categorizing emails–using NER. Powered by TextRank and Spacy
If you're learning a new language, Influent makes the process of vocabulary acquisition and pronunciation a fun and engaging process by gamifying a traditionally rote process. Influent features ~500 words with native audio recordings in 18 different languages!
WordsTool allows custom-built vocabulary practice. Fill in fully editable word cards. Receive various exercises based on your cards. Manage the way you practice by choosing the exercises you like and scheduling your learning process.