According to American Association of School Librarians, the best apps for teaching & learning in 2019 are Chatterpix Kids, EarthViewer, Equity Maps, Figment AR, Green Screen by Do Ink, iCell, iCivics-Suite, Khan Academy Kids, Mixerpiece, Nearpod, Novel Effect, Object Viewer for Merge Cube, PBS Kids Scratch Jr., Quizlet, Sites in VR, Sora, Stop Motion Studio, Tynker, Wakelet, Wolfram Alpha.
See details at https://standards.aasl.org/project/ba19/