Sendbook is a premium, offline-first climbing logbook built to replace expensive subscriptions. For a flat $2.99, you own it forever. Designed for concrete warehouse gyms, it logs your bouldering and top rope sessions instantly without cell service. Features include lightning-fast grade grids, a Dynamic Island rest timer, 16-week activity heatmaps, and session analytics. There are no ads, and your data is fully exportable. Pay once, own it forever, and get back on the wall.