Mentimeter is an interactive presentation tool that helps to engage students and enables every voice in a classroom or lecture hall to be heard. You can use it to gauge student comprehension, test knowledge retention or as a fun way to break up learning. Your audience uses their smartphones to connect to the presentation where they can answer questions. Visualize their responses in real-time to create a fun and interactive experience.

https://youtu.be/Sd0fAenuAnw

Advantages

• Free version available.
• Easy to use.
• May be customizable for your own branding.

Disadvantages

• Strongly limited free version.

Manual? Please follow this link.