Buy Nonet
Opening the checkout (Paddle).
Nonet license (one-time purchase): $9.99. Any sales tax or VAT is shown at checkout. One license covers every Mac you use, and all 1.x updates are free.
Payment, receipts and sales tax are handled by Paddle, the merchant of record. Full refund within 30 days of purchase, no questions asked.
Before you buy, the 14-day free trial lets you check that Nonet works on your Mac (download).