The best way to financially support QField is by subscribing to one of the monthly sponsorships. By doing so you help getting freshly baked QField versions straight to everyone's devices.
Currently no crowdfundings are active
You probably have plenty of ideas for nice features that are not implemented yet. Please contact us to discuss the best approach to integrate this idea into QField or to create your own custom app.
QField, QFieldCloud and QFieldSync are developped by OPENGIS.ch. OPENGIS.ch does consulting, development, training and support for open source software including QField and QGIS.