This matters and we will never bury it. Sticki.ly is a paid app. You start with a 7-day free trial — unlimited stickis, every platform, no credit card to start — so you can prove the cross-device sync actually fits your life before you pay a cent.
After the trial it's $9.99/month or $95.99/year, or a one-time $399 for lifetime access. The annual and lifetime plans also include the all-apps bundle — every premium Bravely utility, on every platform, under one account. Every plan unlocks unlimited stickis and a 10 GB synced attachment pool. If the friction you're paying to kill is “my note is on the wrong device,” that's exactly the buyer Sticki.ly is built for. The OS built-ins are free and unlimited on their own platform — if you never leave one operating system, use them, and we'd rather tell you that than oversell.
Sticki.ly is at an early version (v0.1.x). It does the cross-device-sync job well; it is not a decades-old sticky-note suite with alarms, tags, and memoboards. If you need that depth, we say so plainly on our Sticki.ly vs Notezilla comparison.