How do my phone and computer stay in sync?

Devices signed in to the same Calsa account share saved account data. Entries saved without a connection can remain only on that device until the connection returns and saving is confirmed. Local storage is not proof that another device can already see them.

Keep the original device signed in and connected until pending entries sync. Check the same diary date on your other device. If the result is unclear, contact support from the affected device. Do not clear its data or reinstall while it may hold the only copy.