
WA-Instant
Message temporary contacts without saving them to your phone
What it does
Tired of cluttering your phone's address book with endless contacts you cannot even remember? WA-Instant solves this in 3 steps: 1️⃣ Paste a phone number. 2️⃣ Type an optional greeting. 3️⃣ Download a QR code for clients to scan, or launch the chat instantly! Perfect for realtors and store owners who want to put a "Scan to Chat" code on their property boards, storefronts, or Instagram bios. Lightweight, secure, and 100% free
Does the same job
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- IBI built an app to use a QR code as my doorbell2024 · dingdongdoorbell.com · ▲140
I didn’t have a doorbell before (multiple reasons) and my house feels unwelcoming without one. So I built a doorbell app that uses a QR code - visitors scan the QR code to ring the doorbell and I get notified on my phone. Here is an example of the QR code I have on my door. You can scan it and say hello: https://www.thebacklog.net/img/2024/10/show-hn.png This was also a great excuse to build my first app for Android and iPhone. I’d love to get some feedback before I spend more time polishing the app. Please try it out and feel free to ask me any questions! No…


QuetLaChat (QuickChat)18d ago · quetlachat.namlamcode.com · ▲1**Scan. Chat Instantly. No Friend Request Needed.**

More growth this month
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AstraPixels▲267A pixel-art solar system at its real current positions.
Growth · 29d ago · astrapixels.com
Launched alongside, May 2026
the whole month →

Parallel agents, diff reviewer, and multi-model comparisons
Dev tools · May 2026 · kilo.ai


- NW
Hey HN, Henry here from Cactus. We open-sourced Needle, a 26M parameter function-calling (tool use) model. It runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices. We were always frustrated by the little effort made towards building agentic models that run on budget phones, so we conducted investigations that led to an observation: agentic experiences are built upon tool calling, and massive models are overkill for it. Tool calling is fundamentally retrieval-and-assembly (match query to tool name, extract argument values, emit JSON), not reasoning. Cross-attention…
Life & fun · May 2026 · github.com
- FM
Dev tools · May 2026 · github.com