The best presentation app for audience
engagement
Mentimeter (Web)

Mentimeter pros:
Tons of audience engagement features
Simple for participants to interact
Mentimeter cons:
Less granular customizability
Bit of a learning curve
If you need to engage with an audience during your presentation, Mentimeter makes that easy. The app is designed around interactive elements like quizzes, surveys, Q&As, sliders, and more (even a Miro whiteboard!).
Each of these is included in a number of different, professional-looking templates, so you can build a fully interactive presentation super quickly.
When it’s time to present, your audience members can scan the QR code with their phone cameras or type in the URL and access code to participate. There’s one code per presentation (so they won’t have to do this on every slide), which gives access to each slide as you move through the presentation.
There are two main drawbacks to this one, though. First, there’s a bit of a learning curve and less familiar editing interface (but I found it pretty easy to learn with some practice). The other drawback is that you can’t get as granular with the visual customization as you can with many other presentation tools.
Mentimeter pricing: Free plan includes 50 participants per month and 34 different slide types; upgrade to the Basic plan for $11.99/presenter/month to get unlimited participants and slide types, private presentations, and more.