DPI Changer: Display Density

DPI Changer & Density Tool helps you inspect and adjust Android's logical display density. It is designed for careful interface scaling, readability experiments, layout testing, and repeatable Android setups.

Check the current density

See the logical density Android is using before you change it. The app also explains the difference between logical density and the screen's physical pixel density, so you know what the setting can and cannot change.

Test before you apply

Use a timed test to preview a DPI change. The previous density is recorded and restored automatically when the test ends. Recovery guidance and reset actions remain available if a value makes the interface difficult to use.

Choose the setup route your device supports

Android restricts system-level density overrides. Depending on your Android version and device, the app can guide you through a supported route such as Shizuku, Wireless Debugging, a one-time computer permission grant, or root. Setup availability varies by manufacturer and software version.

Optional AccessibilityService helper

If you choose Automatic setup, DPI Changer asks you to enable the optional DPI setup helper, which uses Android's AccessibilityService API. After you review the in-app disclosure and agree, the helper can view and interact only with visible Developer options and Wireless debugging screens in Android Settings. It reads Settings text and controls, the temporary six-digit pairing code, and local connection addresses and ports so it can turn on Wireless debugging, open the pairing screen, tap the required controls, pair the app with Wireless ADB on the same phone, grant DPI-control permission, and turn Wireless debugging and the helper off after setup.

The pairing code and other Settings screen content are processed only on your device and discarded after setup. A local Wireless ADB endpoint may remain stored on the device for reconnection. Nothing read by the helper is sent to us, shared with third parties, or used for ads or analytics. Automatic setup is optional: you can decline and use manual setup, and you can disable the helper at any time in Android Accessibility settings.

Useful tools

• Read the current logical display density
• Test a DPI change with automatic restore
• Apply a tested value and reset it later
• Create presets for repeatable setups
• Calculate density values for another interface scale
• Add optional Quick Settings, launcher shortcut, and Tasker workflows
• Keep emergency ADB reset commands available

Important limitations

Changing logical density affects Android interface scaling. It cannot add physical pixels, increase the panel's native PPI, improve touch sampling, or guarantee better gaming performance. Some apps and manufacturer interfaces may react differently to unusual density values.

Record the original density, use the timed test first, and confirm that important apps remain usable before keeping a change.

Recent changes:
Added a complete AccessibilityService disclosure for optional automatic Wireless Debugging setup, plus reliability and policy updates.