Design Recommendations:

1. The design should respect the user's decisions and shouldn’t offend their privacy in any condition, especially by revealing or publishing sensitive information. In this design, this ring invades the user’s privacy to a great extent.

2. The design should be able to provide reliable results to users. The truth or lie judged by a device can be highly unreliable and can lead to misunderstandings between the couple. The sensors are not good enough to provide highly reliable to users.

3. Users should be able to opt out of the design easily so that they can have the sense of control over the design. This ring is actually a burden to the user rather than a bonding tool for his/her marriage. The device also records and stores the data collected about user habits and the rate of lying which is an unethical practice.

4. The product should provide an ambient feedback to users rather than very annoying notification, requiring too much attention from users. The feedback system of this ring is too annoying for the user.