NOTE: GeldVogel for android uses the official MoneyBird API. There is no 3rd party involved: your requests go directly to the MoneyBird server. As safe as can be.
MoneyBird is an online service that allows you to create invoices and estimates with ease. You can add your invoices on your android phone and send them to your customers right away. GeldVogel is an application that uses the MoneyBird API to allow you to view and send invoices on the go. (sending is only possible in the premium version)
With this app you will have access to your cloud stored invoices and expenses.
With the premium app you can also access your estimates and incoming invoices anywhere. You can easily add new incoming invoices by uploading a photo straight from your camera.
If you don't have an account yet go to the MoneyBird.nl website and register for either a free account, a €10 a month account or a €25 euro Plus account.