Comment by ezst

That's correct, there is no official mobile app with full offline sync at the moment, but there are independent efforts underway¹ and more or less involving workarounds².

If you have internet and don't need full offline sync, you should be able to use Trilium decently well today, with the recent responsive theming efforts that went into Trilium Next.

¹: https://github.com/FliegendeWurst/TriliumDroid ²: https://github.com/orgs/TriliumNext/discussions/827