How accurate is the Depth app compared to other depth-measuring devices

Comparison with Other Depth Measurement Devices

1. Dedicated Dive Computers:
Professional dive computers typically provide higher accuracy and additional features such as decompression stop information and gas analysis. They are designed specifically for diving and often comply with more stringent standards than the Depth app, which is not intended for professional diving[4].

2. Intel RealSense D415 Camera:
This depth camera can achieve sub-mm accuracy in controlled environments, particularly at close ranges. It excels in scenarios involving transparency and translucency, making it more precise than the Depth app for specific applications[2][3].

3. iPhone's ARKit:
The iPhone utilizes LiDAR technology for depth sensing, achieving an average accuracy of around 1mm at close range with its rear camera. However, its effectiveness diminishes over longer distances, unlike the Depth app, which is optimized for underwater use up to 40 meters[1][2].

Summary of Accuracy

- Depth App (Apple Watch Ultra): ±1 meter accuracy; maximum depth of 40 meters.
- Dedicated Dive Computers: Generally higher accuracy with advanced features.
- Intel RealSense D415: Sub-mm accuracy in static environments; excels in specific scenarios.
- iPhone ARKit: Up to 1mm accuracy at close range; less effective at greater distances.

In conclusion, while the Depth app provides adequate accuracy for recreational use, dedicated diving equipment and advanced depth-sensing technologies offer superior precision and additional functionalities that may be necessary for professional or technical diving activities.