Data collection strategies and the quality of the collection vary for parameters that are measured or observed in different citizen science projects. This makes it difficult to merge
data of the same kind from different projects and thus hampers the reuse of data. Modular designed and customizable applications for mobile devices (Apps) represent a framework that can help to foster the standardization of data sampling methods and strategies. At the same time, they provide enough flexibility to be adjusted for the use in
various scenarios. In this contribution, a corresponding framework is presented by the concept and the structure of the FieldMApp