# The Hidden Costs of DIY Android App Security | Guardsquare

DevFeed: [The Hidden Costs of DIY Android App Security | Guardsquare](<https://devfeed.tech/articles/the-hidden-costs-of-diy-android-app-security-guardsquare-26305.md>)

Original publisher: [Read original article](<https://www.guardsquare.com/blog/diy-android-app-security-hidden-costs>)

Author: Michael Olechna - Product Marketing Manager

Published: 2026-07-28T13:00:55Z

Content type: opinion

Language: en

Sources: [Guardsquare Blog](<https://devfeed.tech/sources/guardsquare-blog.md>)

Topics: [Security](<https://devfeed.tech/topics/security.md>), [Android](<https://devfeed.tech/topics/android.md>), [Mobile](<https://devfeed.tech/topics/mobile.md>), [obfuscation](<https://devfeed.tech/topics/obfuscation.md>), [R8](<https://devfeed.tech/topics/r8.md>), [Open Source](<https://devfeed.tech/topics/open-source.md>)

Tags: [android](<https://devfeed.tech/tags/android.md>), [dexguard](<https://devfeed.tech/tags/dexguard.md>), [mobile](<https://devfeed.tech/tags/mobile.md>), [obfuscation](<https://devfeed.tech/tags/obfuscation.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [protection](<https://devfeed.tech/tags/protection.md>), [r8](<https://devfeed.tech/tags/r8.md>), [security](<https://devfeed.tech/tags/security.md>), [thought-leadership](<https://devfeed.tech/tags/thought-leadership.md>), [threat-monitoring](<https://devfeed.tech/tags/threat-monitoring.md>)

## AI overview

The article argues that DIY Android app security built around open-source tools can leave important protection gaps. It explains that R8 helps compile and optimize Android applications but is not a complete security solution, lacking capabilities such as string encryption, API endpoint security, and control-flow obfuscation.

## Source excerpt

The DIY temptation to build with open-source is strong for mobile app developers. After all, their job is to build, secure, and design new applications, features, and architectures that benefit the users of their apps.