TiltMeter is a professional grade angle measurement tool that offers a range of features for various applications. Whether you need to align pictures, measure angles of elevation, or indicate the roll of vehicles, sailboats, and aircraft, TiltMeter has got you covered. The app also supports measuring the slope angle of a tape or chain during distance measurement, calculating roof pitch, and indicating the inclination of an aircraft or ship relative to the horizontal. With iOS 4 support and retina display compatibility, TiltMeter provides a seamless user experience.

The free version of TiltMeter does come with some limitations, including the presence of ads, the need to calibrate every time, and the inability to email log information. However, these limitations can be overcome by upgrading to the pro version through an in-app purchase.

Features of TiltMeter include a bubble level, motion-sensitive lock, reference angle setting, logging measurements, sound feedback, calibration mode, different precision modes, full-screen mode, personalization options with beautiful backgrounds, and disabled sleep mode. The app's graphics are also visually stunning, making it a pleasure to use.