Many video professionals use a bull’s eye spirit level to make sure their camera is level. In fact, plenty of tripods and rigs have one built-in. Thanks to these bubble level apps, you can use your iPhone as a level anywhere:
Bubble Level: this bubble level iPhone app lets you measure any angle. It also shows you the flatness of any surface. It even serves as an AR ruler.
Pocket Bubble Level XXL: a bubble level for iOS that shows the inclination angle in each plane. The premium version comes with an augmented reality like spirit level.
Precise Level: a spirit level for iPhone that serves as a handy tilt meter. It shows the angles of each plane clearly.
Bubble Level°: another app that you can use to measure slopes & angles and ensure proper alignment.
Measure Angles: a 360-degree protractor and digital bubble level for iPhone. It comes with a 6-point calibration assistant with 0.01-degree precision. It also comes with audio feedback.
Have you found better bubble level apps for iOS? Please share them here.