There are several apps with the acronym SMD, each with a different purpose. Here is a list of the apps and their descriptions:

1. SMD info - Apps on Google Play: This app allows you to decode the value of the SMD element (resistance, capacitance), as well as the color coding of the resistor.

2. Seeking Millionaire Dating SMD - Apps on Google Play: This is a dating app for people seeking elite men and high-quality single females. Sugar daddy/sugar baby types are not allowed.

3. SMD - Simple Magnetic Detector on the App Store - Apple: This is a magnetic field detection tool for Apple Watch. It monitors the X, Y, and Z components of the magnetic field.

4. SMD Symposium App on the App Store: This app is for the SMD Symposium, which is the leading educational, professional development, and networking event in the space and missile defense community.

5. Elements® Mobile App – SMD | Structural Metal Decks: This is a calculation tool that enables users to run simple span checks on a range of floor deck profiles.

6. SMD - Microsoft AppSource: This app provides quick access to strategic multi-dimensional analytical data for financial managers. It allows users to capture and collect fundamental data, check and adjust quality, and more.

Therefore, the term "SMD app" is not specific and can refer to any of the above apps depending on the context.