After installing the web extension and clicking its icon it shows a QR code that is scanned by a phone which opens the web app in the browser. When the WebRTC connection has been set up between the devices you can steer a dot on the computer web page by holding a button and pointing the phone. The app also has other presentation clicker features like switching slides, drawing, presenter notes, and can also be used for remote controlling some videos (tested on YouTube and Plex).

Firefox extension: https://addons.mozilla.org/sv-SE/firefox/addon/clikr/ Chrome extension: https://chromewebstore.google.com/detail/clikr/oalndbmcbpchb... Home page: https://www.clikr.app/

I've always been fascinated in how much the web can do. This project started as a fun small POC many years ago when some of these native app-like functions were less common. I got the idea to see if I could make my phone control a "laser dot" on my computer just by tilting the phone like a real laser pointer. Being a web guy I went with web extension + web app. Surprisingly I think I got the basics working in an afternoon or two, having some experience with web extensions from before. Getting the user experience smooth and stable and adding other presentation features in various online tools took more time...

It uses RTCPeerConnection for the communication, Metered as signaling server, and a small protocol for the commands (point, switch slides, etc.). The deviceorientation event is used for getting the orientation (which has to be explicitly allowed on some devices). One issue here is that the angle values don't actually mean anything without a reference. Therefore the first pair of angles received in the extension becomes the origin for that "pointing". The origin on the screen is the middle of the viewport and additional received angles move the dot with those origin values as reference. I.e. it will always start in the middle. This is of course not as good as a real laser pointer but I think it works quite well when you've tried it a bit. Distance to the screen and its size will matter for how much to move the dot which is why there is also a calibration tool.

I like the other features too but I think the laser pointer is the fun one.

There are some paid features (one-time payment, no subscription) but the laser pointer, basic presentation features, and video remote are free and doesn't require an account.

It has some users but it's hard to get them to give feedback so honestly I don't yet know much about how it's performing in real situations. If anyone here tries it out please tell me what you think.

Show HN: NodusDB – Zanzibar-style authorization, embedded like SQLite

Ory Continuous Security License: (CVE) Patch Subscription for OSS

Show HN: ArXiv papers as reflowable Kindle books, equations as MathML

Show HN: Hadamask – Encrypt RAG metadata, keep exact vector search

'We Used to Be a Wealthy City': Auto Woes Slam German Towns

World's best cities for Cycling and Running

Show HN: Mantis – Faster browser interaction than Playwright MCP

MiniMax H3-Image Released, an Open-Weight Image Model Built on H3

Generate QVD Files Automatically

Reddit Launches Reddit Reviews

Show HN: Users search and combine focused agents in a conversation, no prewiring

Ex-FBI agent stole $2.5M in crypto from wallets in 35 FBI investigations

New CSS, Who Dis? (2026 edition)

Pirate Library WeLib Hit with $19.5M Default Judgment and Domain Takedown Order

Anthropic heads for lower than expected $1.3T valuation

Smart home devices should work without the internet

Ask HN: Anyone else feels Grok 4.7 got nerfed?

What I learned from running a liquidity incentive bot on Kalshi

A Year as a Research Engineer Working on RSI at Meta

Ask HN: Is misaligned AI less dangerous than AI controlled by a bad actor

Show HN: TriLog – a personal data logger for mood, energy, and symptoms

OpenLoc v0.2.0 is out now

Show HN: Clikr – Virtual laser pointer that follows where you point your phone

AI Companies Crack Down on the Coolest Thing People Were Doing with AI

Xanadu and HyperLight Breakthrough of Nearly 3x Reduction in Optical Switch Loss

Self-sufficient mobile weather station

The observability UI as we know it is dead. So what comes next?

We reduced core unit boot time from hours to minutes

Harbor: 100 parallel rollouts on Tensorlake, 47 rollouts/minute at 37¢ per batch

WhatsApp Audio to Text

Show HN: NodusDB – Zanzibar-style authorization, embedded like SQLite

Ory Continuous Security License: (CVE) Patch Subscription for OSS

Show HN: ArXiv papers as reflowable Kindle books, equations as MathML

Show HN: Hadamask – Encrypt RAG metadata, keep exact vector search

'We Used to Be a Wealthy City': Auto Woes Slam German Towns

World's best cities for Cycling and Running

Show HN: Mantis – Faster browser interaction than Playwright MCP

MiniMax H3-Image Released, an Open-Weight Image Model Built on H3

Generate QVD Files Automatically

Reddit Launches Reddit Reviews

Show HN: Users search and combine focused agents in a conversation, no prewiring

Ex-FBI agent stole $2.5M in crypto from wallets in 35 FBI investigations

New CSS, Who Dis? (2026 edition)

Pirate Library WeLib Hit with $19.5M Default Judgment and Domain Takedown Order

Anthropic heads for lower than expected $1.3T valuation

Smart home devices should work without the internet

Ask HN: Anyone else feels Grok 4.7 got nerfed?

What I learned from running a liquidity incentive bot on Kalshi

A Year as a Research Engineer Working on RSI at Meta

Ask HN: Is misaligned AI less dangerous than AI controlled by a bad actor

Show HN: TriLog – a personal data logger for mood, energy, and symptoms

OpenLoc v0.2.0 is out now

Show HN: Clikr – Virtual laser pointer that follows where you point your phone

AI Companies Crack Down on the Coolest Thing People Were Doing with AI

Xanadu and HyperLight Breakthrough of Nearly 3x Reduction in Optical Switch Loss

Self-sufficient mobile weather station

The observability UI as we know it is dead. So what comes next?

We reduced core unit boot time from hours to minutes

Harbor: 100 parallel rollouts on Tensorlake, 47 rollouts/minute at 37¢ per batch

WhatsApp Audio to Text

Ask HN: Anyone else feels Grok 4.7 got nerfed?