Upgrade to DueKindly Pro
Unlimited invoices, firm & final templates and the late-fee calculator.
Checkout isn't connected yet. The site owner still needs to add the payment settings in js/config.js (see DEPLOY.md). Nothing has been charged.
What you get
- Unlimited invoices
- All 4 tones incl. firm reminder & final notice (2 versions each)
- Edit templates or write your own
- UK & EU late-payment fee calculator, added to your final notice
- One calendar feed for all invoices
- CSV export, custom signature & payment link
- “Money recovered” tracker
How activation works
- Pay securely by card. Checkout is run by Polar, our reseller and merchant of record, which also handles tax and receipts.
- That’s it — DueKindly opens with Pro already switched on. No key to copy.
- Want Pro on another device? Copy your license key from Settings → License and paste it there. Lost it? It’s in your Polar customer portal.
← Back to the app · I already have a key