[jstaniek]

Yes I believe so. how do you feel about SQLite for local storage?

Kexi picked SQLite as the default backend in 2004, and it was a good bet. For native mobile there's Qt Quick for the GUI with which large part of Kexi is compatible. A database creation/handling layer has been extracted years ago and now it matures under name KDb: https://community.kde.org/KDb

[kmcb]

I think SQLite would work well for most local storage application. It also helps that it is well known, well documented, and supported.