Penup

- Sketchbook from Autodesk is a popular sketching app for Android with a decade worth of updates and features. - Penup from Samsung is a fully-featured sketching app available for most Android devices and Windows, with no in-app purchases. - Concepts is a flexible app with a free version offering a wide range of features, with the option to pay for more pro features. - Microsoft Whiteboard is a tool for planning and productivity, available for Microsoft Office 365 subscribers. - Infinite Painter is an app with a simple UI, hundreds of brushes, and customization options, available for a one-time purchase or through Google Play Pass.