Sideleaf is a prelaunch Mac app for short notes and checklists that stay easy to glance at while you work in another app. The native app is not downloadable yet, and the page has a browser demo and a confirm-by-link launch list for an email when the app is ready. Pricing is a one-time purchase with no subscription.

Sideleaf is being built for the moments when a short note or checklist needs to stay easy to glance at while working in another Mac app. This prelaunch page shares the intended workflow and lets interested Mac users request one email when the native app is available.