The preferred way to contact support is via the support function built into the apps, which can usually be found in the main menu under Help. This gives me additional information about the version of the application I am using. Alternatively there are the following support forms on the websites:
Errors and feature requests can also be directly managed and evaluated for the following apps:
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In depth articles about app development backgrounds: Entwicklung:
Did you like the app or the product? That is great! Here are ways to share the joy.
Some apps offer programming interfaces:
I develop and sell apps, but I am also involved in the open source area. I would like to provide more Open Source, but then the income is missing. For this reason it is also possible to support my work.
Of course, other ways are also possible or contract work against invoice. Please contact me via email@example.com.