![]() During the trial, cancel any time until 24 hours before the trial expires, and you will not be charged. When you choose to upgrade with the yearly subscription, you can start using Penbook Premium for free with a 7-day free trial. Penbook Premium is available by purchasing a yearly subscription or a one-time (lifetime) in-app purchase. Upgrade to Penbook Premium to create and export unlimited notebooks, receive access to new stationery and covers as they're designed, and get regular app updates. Use all of Penbook's stationery and writing features in a single notebook for free for as long as you like. Staff and tablature (music) paper with optional linked staves.Chemistry paper for easily sketching molecules.Engineering paper with variable density.Storyboard paper with 3 frame aspect ratios.Developer stationery with device stencils and configurable note-taking areas.Perspective paper, configurable with one, two, or three vanishing points.Isometric stationery with equilateral (60-60-60) or isosceles (75-75-30) triangles.Semi-log and loglog paper for data with exponential growth or decay.Polar graph paper for plotting radial data.Table stationery for hand-written spreadsheets. ![]()
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