Live reactions that show how every slide really lands.
Your audience reacts from their phones while you present — a thumbs-up, a mood, a 1-to-5 rating, a smiley, or an emoji that flies across the slide, plus a written comment when they have more to say. Energy for the room in the moment; honest per-slide feedback waiting in your insights afterwards.
On the big screen
On their phone
How are you feeling before we begin?
Try this rating format on the phone. Results stay in the post-event report.
Feel the room you can't see.
On a webinar you present into silence. Emoji bursts put the audience back on the slide — you watch the reactions land as you announce, and the insights dashboard keeps the receipts for the follow-up email.
On the big screen
On their phone
React with an emoji
500 characters left · saves automatically
Participants send reactions from their phones. Emojis appear on the slide.
A rating on the slide you're unsure about.
Drop a one-tap 1-to-5 checkpoint exactly where you want the truth — after the dense section, before the break. Feedback lands pinned to that slide, so 'it was unclear' finally has an address.
On the big screen
On their phone
React with an emoji
500 characters left · saves automatically
Participants send reactions from their phones. Emojis appear on the slide.
Know what to reteach before the quiz does.
A confidence pulse after each module shows where the cohort is shaky while you can still fix it. The AI summary pairs the low ratings with the comments that explain them — so you reteach the right ten minutes.
On the big screen
On their phone
React with an emoji
500 characters left · saves automatically
Participants send reactions from their phones. Emojis appear on the slide.
How it works
- 01
Add it to your slides
Drop the activity into your deck — in the Decka editor, PowerPoint, or Google Slides.
- 02
Audience joins by QR
Everyone scans and answers in their phone's browser. No app, no account, nothing to install.
- 03
Results live on the big screen
Responses land on your slide in real time, in front of the whole room.
What are live slide reactions?
Live reactions let an audience respond to individual slides while you present — a thumbs-up, a mood, a one-tap 1-to-5 or smiley rating, an emoji that flies across the big screen, or a short comment, all sent from the browser on their phones. Unlike a survey after the event, reactions are anchored to the moment: you learn which slide earned the applause and which section left the room thinking, not just how the hour felt on average.
Presenters use them two ways at once. In the room, emoji bursts give a webinar or an all-hands the energy of a live audience. Afterwards, every rating and comment sits in your insights dashboard, pinned to its slide, with AI summaries of what resonated — so the next run of the deck improves on data, not guesswork.
FAQ
Live reaction questions, answered
How do people react during a presentation?
They scan a QR code once and keep reacting from their phone's browser as you move through the deck — no app to install, no account to create. Reactions attach to whichever slide you're presenting.
What kinds of feedback can I collect?
Five reaction formats — a thumbs-up/down, a frowny-to-happy mood scale, a one-tap 1-to-5 rating, a five-smiley scale, or open emoji that fly across the slide — plus an optional written comment on any of them. You choose which slides collect reactions and what each one asks for.
Where do I see the feedback afterwards?
In your insights dashboard, pinned to each slide — reaction timelines, rating distributions, comments, and AI summaries of what resonated.
How many people can react at once?
Up to 50 participants per live activity on the free plan, 150 on Pro, and 300 on Badass. Everyone already in a session stays connected even if the cap is reached.
Does it work in PowerPoint or Google Slides?
Yes. Decka works as a standalone web editor, as a PowerPoint add-in, and as a Google Slides extension — reactions run on the slides you already present.
Ready to make your
presentations interactive?
Start free. No credit card required.