The best presentation app for conversational AI
Gamma (Web)

Gamma pros:
Creates fully fleshed-out presentations from a prompt
Conversational chatbot-like experience
Can still manually edit the presentation
Gamma cons:
Not as much granular customization
I tested a lot of apps claiming to use AI to up your presentation game, and Gamma’s conversational AI features were head and shoulders above the crowd.
Simply give the app a topic—or upload an outline, notes, or any other document or article—approve the outline, and pick a theme. The app will take it from there and create a fully fleshed-out presentation. It’s far from perfect, but Gamma produces a very useful jumping-off point. (Last year, it was by far the best, but this year, other apps are catching up.)
Here’s the key: Gamma is much more geared toward the iterative, chatbot experience familiar to ChatGPT users. Click on the Edit with AI button at the top of the right-hand menu to open the chat, and you’ll see suggested prompts—or you can type in your own requests for how Gamma should alter the presentation.
Once you’ve done all you can with prompts, simply close the chat box to manually add the finishing touches. While you do sacrifice some granular customizability in exchange for the AI features, you can still choose your visual theme, change slide layouts, format text, and add any images, videos, or even app and web content.
Gamma pricing: Free plan includes unlimited users, 400 AI deck credits, and basic view analytics; upgrade to the Plus plan for $8/user/month to get unlimited AI credits, remove Gamma branding, and more.