This indispensable app, Bubble Level, Spirit Level, is a must-have for construction professionals and DIY enthusiasts alike. Developed by NixGame, it cleverly combines a ruler and a highly accurate level, offering more than just basic measurement capabilities. The app's intuitive design makes it perfect for both seasoned builders and novices.

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Key features include:

• Dual Functionality: A built-in ruler supplements the primary leveling function, providing added versatility.
• Multilingual Support: Available in fourteen languages, including Russian, ensuring broad accessibility.
• Effortless Calibration: Simple calibration ensures precise measurements by simply placing the phone on a flat surface.
• Versatile Leveling: Use the app to level objects on a flat surface or align your device to a vertical or horizontal plane.
• Advanced Features (Paid Version): The paid version removes ads and unlocks advanced features like a plumb line for enhanced accuracy.
• Comprehensive Measurement Tools: Measure slopes, angles, and align surfaces with ease. The app also provides audible feedback when perfectly level.
• Convenient Installation: Installable on an SD card for efficient storage management.

The app's streamlined interface and focus on essential tools have earned praise for its simplicity and accuracy. While the free version includes ads, they are unobtrusive and don't hinder usability. The ability to measure levels, calculate areas, and estimate material quantities makes this a highly practical and beneficial tool for any construction project.

In short: Bubble Level, Spirit Level provides accurate measurements, simple calibration, and convenient multilingual support, making it an efficient and user-friendly solution for all your leveling needs.