Your slidesalready teach.

No. Diaposi runs on the .pptx or .pdf you already teach from: same slides, same order, same design. You upload the file and present it. There is no Diaposi slide format to convert to and nothing to re-author, which is the structural difference from tools that are deck builders in their own right.

Diaposi is free to use: no credit card, no contract, no participant cap and no question quota. If you want it deployed across a department or an institution rather than for your own teaching, write to us and we will set it up with you.

Upload the deck, share the code, present. There is nothing to prepare in advance — polls are launched from the slide you are on during the session, so you do not have to have written the questions the night before to get value out of it.

No, on either side. Diaposi runs in the browser on any phone, tablet or laptop. Nothing to install, no extension, no app to ask a room of students to download.

With a QR code or a six-character code you show on screen. No account, no email address, no enrolment list to prepare and nothing for you to administer.

It is built not to. Everything happens on the slide you are already on: you launch a poll from that slide and read the answers on the same screen, and reactions arrive without you doing anything. There is no second application to switch to and no separate window to keep an eye on.

Yes, mid-lecture. You can insert a blank whiteboard as a real slide right after the one you are on, draw and annotate directly on a slide with the room following in real time, or add something to the deck on the spot when a question takes the lecture somewhere you did not plan.

That is the case Diaposi is designed for. A reaction is one anonymous tap, which is a far lower bar than putting a hand up in a room of 200, and questions are up-voted, so the one person who does type “I did not follow that” surfaces everyone else who was thinking it without any of them having to speak.

The queue orders itself. Questions are up-voted by the room, so what rises to the top is what most of the lecture wants answered rather than whatever was typed most recently. There is no cap on how many people can join or how many questions they can ask.

Nothing is lost. A dropped host connection never ends a session: the room, the current slide and everything already collected stay exactly where they were, and reopening the session puts you back in control. Students who reconnect are resynced to the live slide with their reactions intact. Only pressing “End session” ends a session.

No, deliberately. Participation is anonymous by default and nothing is ranked or scored publicly, because the students who most need to say “I did not follow that” are the least likely to do it in front of the room. If you want a competitive quiz for revision, a quiz tool does that job better than we do.

There are no student accounts or student emails. Participation is pseudonymous within each session: reactions, votes and questions carry a random session-only identifier, not a name. Private note text stays on the student's device; only activity counts reach the teacher report.

Yes, and they stay private. Notes are written on the slide they belong to, nobody else can see them — not other students and not you — and every note comes back in that student's own end-of-session report.

None that identifies them. No accounts, no email addresses, no cookies, no tracking and no student records. There is nothing to leak and nothing for a student to consent to, and the platform is built and hosted in Europe under GDPR. Privacy is a property of the product, not a setting you have to switch on.

An instant report: a 0–100 engagement score for the session, a slide-by-slide heatmap of where attention held and where it dropped, the questions the room up-voted, and per-slide breakdowns underneath. It is ready when you finish presenting, not the following week.

Yes. Every report exports as PDF or CSV, so it can go straight into a teaching portfolio, a course review, a module report or a spreadsheet you already keep. The CSV is the same data as the PDF, for anyone who wants to analyse it themselves.

Any session where one person presents to a room. The mechanics are the same whether it is a first-year lecture, a conference keynote, a corporate training day or an internal meeting — a deck, an audience with phones, and a report at the end.

Yes. It is free to start, so you can upload a deck and run a session on your own to see what the presenter's screen looks like. If you would rather be walked through it, book a 20-minute demo and we will run one with you.