A one-time WRITE_SECURE_SETTINGS grant thru ADB is required. This is NOT root. Instructions are in the app. However if your device is already rooted you can immediately grant it without the need of a computer (v1.10+).

✅ Easily TEST and/or APPLY your own custom display resolution and density (DPI) settings
✅ Can smartly compute the other side (height or width) of the display resolution based on the displays aspect ratio when you input on any one side (when the option is enabled)
✅ Can smartly compute the matching density (DPI) of the desired custom display resolution using some trigonometric computations (when the option is enabled)
✅ Smartly suggests the name of custom display resolution for adding to the presets
✅ Automatically reads the device's pre-defined screen resolution setting(s) so you can easily switch to it(them) when desired
✅ Option to reset display resolution and density values to default factory values
✅ Save multiple custom display resolution and density settings to the preconfigured list for easier use anytime (premium). Free user is limited to saving one custom resolution only.