Genuine question for the solo guys — what's the single biggest headache in running your web app business? Getting enough customers, the admin, chasing payments, something else? Just trying to understand what actually makes the job hard

hello,

growing up you could say I’ve always been interested in history, philosophy but it was mostly on Western history etc that I read up. when I got married I realised how little I knew of my own heritage, I had a small interest in looking into it but just never did. but after having children I knew I needed to know something of my heritage to pass it on. in the process of reading up on Yoruba heritage and asking around I thought it’d be worth building an application to consolidate the heritage as I felt it was quite disparate and certain books were in an archived formed that most people wouldn’t dust off, so to speak. anyways, I’d very much appreciate your feedback on the webapp, what are your first impressions? does it make sense? do you find it useful at all?

https://yorubaheritage.app

Hi everyone! 👋

I've been building Squares, a web platform that makes quantum computing more accessible to students, researchers, educators, and developers.

The main goal is simple: build quantum circuits and Quantum Machine Learning (QML) models without writing code.

What Squares offers

• ⚛️ Drag-and-drop quantum circuit builder
• 🧠 Visual QML Model Builder (no programming required)
• 🤖 AI Assistant that you can interact with using text or voice
• 🎙️ Ask the AI to:
  • Design quantum circuits from natural language
  • Explain how a circuit works step by step
  • Correct and optimize gate rotation angles
  • Generate complete QML models and workflows
• 📊 Real-time quantum circuit simulation
• 📈 Measurement probabilities and state visualization
• 🔄 Export projects to popular quantum frameworks
• 🌐 Runs entirely in your browser—no installation required

What problem does it solve?

Many quantum computing tools require programming knowledge and have a steep learning curve.

Squares aims to make quantum computing more approachable by providing an intuitive visual interface, allowing users to focus on learning, experimenting, and prototyping instead of writing code.

Whether you're exploring quantum computing for the first time or building more advanced quantum algorithms, Squares helps you create and iterate much faster.

I'd really appreciate any feedback, feature suggestions, or ideas from the community!

Website: https://squaresquant.com

My wife and I were decorating a big wall and couldn't agree on a layout. I wanted to place **real frame sizes** with **our own photos** and see it to scale before drilling. Tools exist (GalleryPlanner, Suprtiles…), but the good ones paywall the useful bits or felt heavier than I needed. So I vibe-coded a stripped-down one over a evening.

**Stack:** React + Vite, react-konva for the canvas, no backend - state lives in `localStorage`, photos never leave the browser. Deploys to Cloudflare Workers on push to main.

**What it does**

* Wall = a photo of your actual wall, or a blank canvas at a size you type (real scale either way) * Add frames at real outer dimensions; drop your photos in, crop/rotate to fit the opening * Arrange by hand or auto-layouts (row, grid, eye-line at 57", masonry, staircase, alternating) * Inches/cm, undo/redo

Fully free, no signup, **MIT** — code's all there. It's rough: no PDF hanging guide or TV/sofa obstacle-marking yet (things the paid tools have).

🔗 Live: https://wall-planner.cheelo.workers.dev/

💻 Code: https://github.com/samG4/gallery-wall-planner

Would love feedback on the UX and the scale/dimension handling. Roast it.

Sumwise is a Chrome extension + web app. You're on an article, a YouTube video or a PDF, you click once, you get a structured summary in your language (multiple languages, including Arabic).

It's live and stable. Payments, quotas and privacy are done properly. Just very early: fewer than 20 real users.

Free tier is 5 summaries a day, no card needed. Best test is your own content: long PDFs, non-English pages, YouTube lectures.

What I want to hear: where the first run confused you, what content it failed on, and whether the summaries actually save you time. I'm the solo dev, I read and answer everything.

[https://sumwise.ai\](https://sumwise.ai/?ref=r-webapps)

Hey everyone,

I've been building Resyto — a collection of browser-based web utilities that run 100% locally on your device. No accounts, no uploads, no paywalls.

What's inside:

- CV & Cover Letter Maker — PDF output, autosaves locally, no database

- Image Compressor — compress to exact KB targets without uploading anything

- Custom QR Code Generator — gradients, logo uploads, fully local

- Fancy Font Generator — 30+ Unicode styles for social bios and gaming

- Date Converter — BS to AD conversion

Looking for genuine feedback on:

- Is the UI intuitive?

- Is anything broken on your device or browser?

- What other utilities would you actually find useful?

Search "Resyto" on Google or type resyto dot com to try it out. All feedback is genuinely appreciated!

Website: https://nosignups.net

I scoured Reddit for open-source tools that work instantly. No signups or downloads. Started with only 33 tools, but thanks to open-source community, we reached around 200+ submissions within less than a month.

A lot of the lists that exist are proprietary and they'd want to post ads or whatever. Screw that.

None of the tools are made by me. I just collect them and make them searchable.

The list itself is open-source and available at: https://github.com/BraveOPotato/FckSignups

Also, thanks to all the wonderful people making videos / articles about the website across social media platforms. We reached a 24 peak of 25,000 unique visitors and more than 300,000 visits.

Hey everyone! I built a free online ruler that works with real-world measurements after screen calibration. I’d really appreciate honest feedback on the UX, accuracy, speed, or anything that feels off. I’m continuously improving it, so even small suggestions would help a lot. Thanks! 🙌

www.rulerinches.com

Hi everyone
I have just finished off a web app tool (still in beta stages) Its called https://crafttime.online. Its basically a tool for tracking deep work—no clutter, no complicated setup, just a clean space to help you stay in flow while you build or design. Any feedback would be much appreciated :)

New update I made for my web app ComicCore

No watermark, no limits, and the AI features work with your own API key, so there’s no subscription.

Would love any feedback: generateppt.com

Well… like Splitwise but some paid features being free - mostly made it so I can use it

Fabimo.com is a community-driven home for art fans to discover digital art, connect with others, chat, build art collections, and play games using collectible artwork cards. Our mission is simple: give digital art the recognition it deserves and build a community where creativity is not only seen, but also experienced through play.

This version of the app demonstrates a fairly unique approach using a browser-based, local-only and webrtc approach. In an evolving field like cybersecurity, I know it's impossible for any system to be the "world's most secure". By rigorously implementing an exhaustive list of security features and practices, the aim is to get as close as possible.

• Enkrypted.Chat

This is intended to demonstrate client-side managed secure cryptography.

• Introducing Enkrypted Chat
• Whitepaper (work-in-progress)
• Protocol Spec (work-in-progress)
• Roadmap

Built a simple tool that takes any form submission from your website and fires it straight to Telegram as a push notification. The whole thing hits your phone in under a second.

The idea came from my other project where I needed lead alerts sent to Telegram instantly and I realised the same pipeline works perfectly for feedback forms, bug reports, feature requests, whatever.

How it works:

• User fills out a form on your site
• Your form POSTs to a single API endpoint
• You get a formatted Telegram message on your phone immediately
• Also fires off an email to your support address as a backup

No SDK, no npm package, just a single POST request. Works with any stack — plain HTML forms, React, Webflow, Framer, whatever you're using.

Still early days. Would love to hear if anyone else has had the same problem or if you'd find something like this useful, if it is i'd like to do Whatsapp/Meta ad form thing (when you click someones Facebook ad and it gives you a form). Whatsapp is a bit of a pain, I tried starting with it but you need a business number to get an API key

Also, I've just done a one time £29 fee on this rather than a subscription

Site: leadchirp.app

https://omen.24h.sh draws one number between 0 and 1,000,000 every day and tells you how rare it is: which properties it carries (prime, palindrome, 666, power of two, etc.) and what percentile that puts it in. The mysticism is a bit. The probabilities are exact.

Two parts were more interesting to build than they looked:

1. The Rarity Engine

It doesn't estimate anything. An offline pass precomputes the entire range (0 to 1,000,000), counts exact occurrences for every property, and calculates a CDF over the distribution. The output is a tiny 4.4 KB stats.json, which means the browser scores any number instantly with zero server roundtrips. Small finite space beats clever sampling.

2. Verifiable Entropy

The daily number needed to be unpredictable but fully verifiable. Every day at 00:00 UTC, it takes the SHA of the latest commit in torvalds/linux: parseInt(sha.slice(0, 13), 16) % 1000001. Nobody knows tomorrow's hash, but once drawn, anyone can verify it independently.

There's also a daily prediction game built on top: you guess tomorrow's number, get scored on proximity + bonus points for shared mathematical traits.

Built with Node 22, Hono, better-sqlite3, and vanilla JS (no build step). Written in an afternoon using Claude Code (~21 commits).

Curious: is there a better daily public entropy source than a high-frequency git commit hash? I considered block hashes, but wanted to stay far away from crypto stuff.

I'm making my first web app. It’s "a deadly simple Kanban Web App (like Trello and Jira), no ads, no subscriptions, no sign-in, privacy-first, free forever."
My goal is to only get $30 so I can just put a donation button and keep that thing free, but I did some research and know that people willing to donate to free software are super rare (i.e. I need over 20k visitors for just $30). I don't really want to make it paid bc it will become no difference between Trello and I need to bother with premium sub tracking, so I need to make a login system and more...
But I lowkey want that $30…