How to reduce my Android app binary size?

Every byte of your Android app binary counts: according to Google's reports, they see globally

• a negative correlation between APK size and install conversion rate for apps with sizes below 100MB. For every 6 MB increase to an APK's size, they see a decrease in the install conversion rate of 1%.
• they found that the download completion rate of an app with an APK size of around 10MB will be ~30% higher than an app with an APK size of 100MB.

That's why it's so important to reduce/optimize your Android app binary size. 

Here are some Tools / Format options / Best practices on this topic:

1. Tools to understand your Android binary size :

• Analyze your project or app bundle with Android Size Analyzer
• or analyze your APK file with APK analyzer

2. Format options to reduce the size of binary to be downloaded and installed on user’s device:

• Use multiple APK if really necessary, as it will increase your maintenance and validation efforts
• Go with App Bundle, the future of Android distribution: deliver app in smaller size while benefiting from modular app development and customizable feature delivery

3. Best practices: THE article to read about reducing apk size, with a few points that we’d like to emphasize:

• Ensure your image resources are not oversized. For example there is no need to load a splash screen of high quality with no compression for each device density. Convert the graphic asset to WebP format if applicable
• Enable ProGuard/R8 in your project for code shrinking