Zaster Banker

A mobile banking app for Sailfish OS

Say hello to Zaster Banker, your mobile banking app!
Zaster Banker currently supports (mostly German) banks which use the FinTS/HBCI API - fast and easy-to-use!

Search-as-you-type for your bank
No complex searching for backend API URLs, your bank ID (BLZ) or other things. Just use your bank's name (or only parts of it), select your bank from the search results and Zaster Banker automatically finds all parameters for you automatically.
Balances for Accounts and Portfolios
See the balances of your accounts and portfolios at one glance
Transaction Details
Access all transaction details of last few months in a easy-to-use list
Discover Zaster Banker

All the feature lists are nothing without some screenshots...

Search-as-you-type. Find your bank as you type

Account Balances. Check all your accounts and portfolios

Transaction List. Access all transaction details of last few months

Availability and License

Where can I get Zaster Banker? What is the License?

We try to make Zaster Banker available as easy and free as possible...


Zaster Banker is available on OpenRepos and in the Jolla Store. Download it from there and install it on your SailfishOS device. By using one of these options, you ensure that you will always get the latest updates.


The application is free software and licensed under the conditions of the General Public License in version 3 (GPLv3). By using this software, you accept the terms and conditions of this license.

Source Code and Bug Reports

You can find the source code on GitHub. Looking forward to your ideas and contributions! In case you found a bug in Zaster Banker, please check if it has already been reported on Issues. If not, please create a new issue there. Thanks!

How much is it?

Purchase your Key to Zaster Banker

We ask you only for a small royalty...

Purchase a key after the trial period

Zaster Banker is and will remain Open Source Software. However, in order to support the development of Zaster Banker, we'd like to ask you for a contribution - you could also call it royalty - before you can run it after a trial period of 14 days. Such a contribution can be made by translating Zaster Banker to another language, help developing it or simply by purchasing a key.

As mentioned, you have a testing period of 14 days after the first run of Zaster Banker. Take your time to test the application and ensure that it fulfills your needs and that you really like it. There are no limitations to the software during this time - simply press the button "Continue Testing" on the initial screen.

If you decide to purchase a contribution key in order to keep on using Zaster Banker beyond the testing period, please choose a contribution type. You have the choice between 4 different contributions: S, M, L, XL. No matter which size you choose, the purchased key will unlock the the complete application after the trial period. It's up to you to decide how much the app is worth to you.

IMPORTANT: By purchasing the contribution key, you acknowledge that a refund is not possible as you could already test the software for 14 days!

Your Contribution Key

After you have received your contribution key from DigiStore24 (they will call it license key), open Zaster Banker on your Sailfish OS device, enter the key on the initial page and press "Validate Contribution Key".

If you have already validated your key on another device, you can reuse it for up to 3 additional devices without the need of another purchase.

Your contribution key linked to a unique device ID - the so-called "Wagnis ID" - and both are stored on our servers together with the information about your purchase. Please see our Terms & Privacy for all details, especially on the handling of your data.

Purchase your Contribution Key

How much do you want to contribute to the development of Zaster Banker?

As mentioned above: It's pay what you want with a small minimum. Every option will unlock Zaster Banker completely!



3,33 €

Only using Zaster Banker from time to time? Go for this contribution!



5,55 €

For the average Zaster Banker user - the standard contribution!



7,77 €

Using Zaster Banker regularly? Show your love with a large contribution!

Extra Large


9,99 €

Addicted to Zaster Banker? Thanks for your big contribution!