The biggest barrier to audience participation in presentations isn't willingness — it's friction. Ask people to install an app, create an account, or enter a code and you'll lose half the room before the first question appears.
QR code voting removes all of that. With Slidon, participants simply point their phone camera at the slide, tap the link, and they're on the voting page — instantly. No download. No sign-up. No code to type.
How the Voting Flow Works
Presenter navigates to poll slide
The Slidon-inserted slide displays the question, answer options, and a live QR code.
Audience scans the QR
Any modern phone camera works. iOS and Android open the voting page immediately in Safari or Chrome.
Audience taps their answer
The voting page shows the same question and options. One tap submits the vote — no confirmation needed.
Results update live on screen
The bar chart on the PowerPoint slide grows in real time as votes come in. Everyone watches together.
Why QR Beats Every Other Method
| Method | Setup time | Audience install? | Works on any phone? | Free? |
|---|---|---|---|---|
| Slidon QR code | Under 5 min | No | Yes | Yes |
| Physical clicker systems | Hours + hardware rental | Hardware required | No | No |
| Dedicated polling apps | Moderate | Yes | Sometimes | Usually no |
| Short code (type a URL) | Low | No | Yes | Varies |
Typing a URL creates typo risk and slows the audience down. A QR scan takes under two seconds — and in a dark room, it's far easier than squinting at small text on a slide.
One QR Code for the Entire Presentation (Rooms)
If you have multiple polls, repeating the scan-per-poll flow still adds friction. Slidon's Rooms feature solves this: one QR code for the whole session.
Participants scan once at the start. Their phone stays on a live page that automatically switches to the active question as you advance slides in PowerPoint. No re-scanning, no page refresh. The audience just watches their screen — the correct question appears when the presenter gets there.
This is ideal for workshops with 3–10 polls, conference talks, or any training session where re-scanning would disrupt the flow.
Technical Details (for the curious)
- The QR code encodes a URL like
https://slidon.ru/r/{roomId}orhttps://slidon.ru/s/{sessionId}depending on whether Rooms is used. - The voting page is a standard HTTPS web app — no special permissions or features required from the phone.
- Results are pushed to the presenter's slide via Server-Sent Events (SSE) — a one-way stream from server to browser with near-zero latency.
- Votes are anonymous by default — no personal data is collected from voters.
- The QR image is generated and embedded in the PowerPoint slide itself at insert time, so it works even without the task pane being open during the presentation.
How to Get Started
- Download the free Slidon add-in for PowerPoint.
- Create a free account — no credit card needed.
- Open PowerPoint, go to the Slidon tab, and create your first poll.
- Insert the poll slide — it comes with the QR already embedded.
- Present. Your audience scans and votes.