Can I use the FreshBooks iPhone app offline?
Want to make an invoice or an estimate? Add clients, create a project, track time or add expenses offline? You can do many things in the mobile app without internet access. Your work is saved until you go online again. There’s no need to worry about duplicate invoice and estimate numbers if you switch between offline and online use. Any invoices and estimates created offline are stored without a number. They will receive their numbers when you sync the app online.
Once you have internet access, simply open up the mobile app and your saved work will be synced to your account. Presto!