Flux — Support

Does Flux sync between my iPhone and iPad?: Yes, via your private iCloud account. The data is end-to-end encrypted through Apple's CloudKit; we never see it.
Can I export my data?: Yes — CSV and JSON export are available under Settings → Data. Both contain everything Flux knows about your expenses.
Does Flux work offline?: Yes, fully. Flux has no concept of a server. Sync happens whenever your device next reaches iCloud.
How do I delete all my data?: Settings → Data → Reset removes everything from your device. If iCloud sync was enabled, it also clears your private iCloud database.

Flux — support.