Features:
✅ Test & apply your own custom display resolution and density (DPI)
✅ Auto-calc the other side (height or width) from one input using your display’s aspect ratio (optional)
✅ Auto-calc matching DPI for a chosen resolution using trigonometric adjustments (optional)
✅ Smart naming suggestions when saving custom resolutions to presets
✅ Reads your device’s stock resolutions so you can switch back anytime
✅ One-tap reset to factory resolution and DPI
✅ Save multiple presets for quick reuse (premium; free tier can save up to 2 custom resolutions)
✅ App shortcuts to apply resolutions in the background (premium)

Permission & Setup:
- A one-time WRITE_SECURE_SETTINGS grant via ADB is required. This is not root. This can be also be granted using Shizuku. You can grant it instantly if you have a rooted device. Step-by-step instructions is provided.