The best alternatives to RemindMe are Wonder, DOit bot, and Telegram movies bot. If these 3 options don't work for you, we've listed a few more alternatives below.
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Universal-2 by AssemblyAI— Speech-to-Text API for conversational data
Your companion app to remind you of all income tax and GST related due dates. Penalties for missing a due date can be extremely high - with Taxarly, you have a reminder system that will ensure you never have to pay these penalties again!