The problem
Freelancers lose real money because nobody follows up on late invoices. Chasing clients feels awkward, so reminders get sent late or never. I wanted a tool that does the chasing politely and on time, so the freelancer doesn't have to.
What I built
- A daily "who to chase" list on the dashboard, so you see exactly who owes you today
- Automatic email reminders on day 0, 3 and 7 that never skip a step
- An AI reminder writer that drafts polite, firm messages in seconds
- Reminders in 4 languages, including Hinglish
- Multiple currencies for clients in India and abroad
- An AI assistant and chatbot inside the app
- An installable phone app (PWA)
- Pro plan with Razorpay for India and Dodo Payments for international customers
The hard parts
Two payment systems, both verified on the server
Razorpay for Indian customers and Dodo Payments for international ones. Every payment is confirmed on the server through webhooks, so nobody can unlock Pro by faking a request in the browser.
AI features with cost limits
The AI writer and chatbot have usage limits per user, so a single heavy user can't run up a surprise OpenAI bill.
Reminders that never skip a stage
Scheduled emails have to fire on the right day, in order, even if something fails along the way. I built the scheduling so every invoice moves through each stage exactly once.
A false phishing flag on my own domain
Browsers started blocking the site with a phishing warning. I tracked down the cause, fixed it and got the domain cleared, which is exactly the kind of launch problem founders get stuck on.
Google sign-in on my own domain
Login shows dueblink.com instead of a random Firebase address, so users trust what they're signing in to.
Built with
Where it is now
Live at dueblink.com and taking payments, built and run by me end to end. Everything I offer clients, from payments and AI to emails and launch fixes, I first did here for myself.
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