APKLint / Engineering notebook

Understand the build.
Ship with confidence.

Practical guides to Android packages, signing, security and release decisions. Start with the problem, inspect the evidence, and follow the relevant tool or official reference.

262 focused guides61 free toolsReference review: 22 Sep 2026

Showing 1–24 of 262 guides · Page 1 of 11.

APK & App Bundles

APK Size vs Download Size vs Installed Size

An APK's file size, estimated download size and installed storage use are different measurements. Before optimizing, decide which one affects the user.

2 min read
APK & App Bundles

Extract APKs from an AAB with bundletool

Use bundletool to generate APKs from an Android App Bundle. An AAB is not an APK with a different extension, and its module manifests and resource.

2 min read

Guides are dated references, not a live view of your app or Console. Verify changing policy and SDK details before release.
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