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Theme fund: NGI Mobifree Fund
Start: 2025-12
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Measurement

APKpatcher/PyAxml

Support tool to manipulate APK and AXML file

The Apkpatcher and pyaxml tools suite is used to analyze, unpack and pack APKs (the Android file format for applications) and also AXML and ARSC files used inside these packages to store data and metadata.

The core strategy is to be able to have a simple and modular way to manipulate these three formats for security reasons: to audit parsers, to audit applications (thanks to some features added to sniff the traffic or automatize some test directly by injecting code inside the APK) or to remove some trackers from an APK for privacy reasons. A code sharing website is planned, so users can share patches to remove trackers and keep control over their devices.

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This project was funded through the NGI Mobifree Fund, a fund established by NLnet with financial support from the European Commission's Next Generation Internet programme under the aegis of DG Communications Networks, Content and Technology. The NGI Mobifree R&D programme is part of Horizon Europe research and innovation programme under grant agreement No. 101135795.