An indie dev writes about building a simple AI bot that lets you set reminders over WhatsApp – think “remind me to follow up with John tomorrow at 3”.
A few weeks in, a tailor told him it was the most useful tool in her whole business. He assumed she meant for her own reminders 
She wasn’t using it for her own reminders at all. She’d given the number to her customers.
Her customers WhatsApp the bot when their order is ready to be picked up, when they want to reschedule a fitting, or when they want to check their order status.
The reframe 
She basically turned a personal productivity tool into a customer communication system. No app, no portal, no login. Just WhatsApp, which every single one of her customers already uses.
We built a reminder bot. She built a lightweight CRM with it.
You could replicate this with Twilio + a bit of AI for under $10/mo.
Sell to local business owners who are struggling with reminders and DMs across 4 different apps.
One WhatsApp number could replace the lot 