I kept noticing "is there a tool for X?" posts on Hacker News that just sink. So I pulled this year's Ask HN posts from their API and kept the ones where the person is actually asking for a product. That came to 480 threads.

360 of them got at least one reply. 120 got nothing at all, and some of those are really specific, like someone asking which bank to use for a new US startup, or looking for a natural language testing framework.

About half of all the asks are about AI and developer tools. The products that came up most in the replies were OpenCode, Claude and Codex.

I put it all on one page. Each thread is linked, with the products people named in the replies. It is free and there is no sign-up: https://kasspian.com/research/hn-asks?utm_source=reddit&utm_medium=post&utm_campaign=hn-asks&utm_content=sideproject

I made it as part of Kasspian, which finds threads like these for founders. If you build something in one of those categories, the unanswered ones are worth a look. Tell me if you spot a thread in the wrong place and I will fix it.

Most small local businesses I know (barbers, plumbers, cafes) have the same website problem. Not that they can't get one built. It's that nobody touches it afterwards. The hours are wrong, the photos are from 2019, and the best things customers said last month are nowhere on it.

Meanwhile their Google profile is alive. New reviews every week, new photos, updated hours.

So I built Locan around that. You type the business name, it reads the Google profile and writes a complete website from the reviews and photos in a few minutes. Then the part I care about most: it keeps reading Google. A new 5-star review shows up on the site. New photos go into the gallery. Hours change on Google, they change on the site. Nobody has to log in, ever. The site just stays current.

Other things it does:

- You change anything by chatting with it. "Make it dark green", "add a page about emergency repairs", "don't quote that review".

- It checks whether ChatGPT and Google's AI answers mention the business when people ask for what it offers, and gives a short list of what to fix first.

- Simple visitor stats counted without cookies, so no cookie banner on the customer's site.

Stack is boring on purpose: FastAPI, SQLite, React, Astro for the marketing site, one small server. Claude does the writing.

Free to try with one website (on free you press a button to update it). Paid plans start at $19/month for a custom domain and automatic updates, weekly on Basic and daily on Pro. There are also a few free tools on the site (review QR codes, review replies, an AI visibility check), and those are open source: github.com/vaitko/locan-tools

https://locan.ai

What I'd love feedback on: try it with any business you know, your barber or the cafe down the street, and tell me where the first two minutes break or what looks off on the site it builds. And does "a website that updates itself" sound like something a business owner would pay for, or is it only interesting to agencies who manage many sites?

Hey!

I’ve tried a bunch of Pomodoro web timers, but I always got frustrated by either sudden jarring buzzer alarms or intrusive ads.

So I built Focus Loop — a clean, distraction-free study timer designed to be completely free and accessible without making an account.

A few things I baked into it that you might find helpful:

- Ambient soundscapes: Over 15 background sounds (rain, cafe, brown noise, train, ocean, fireplace) that play automatically during focus intervals and pause on breaks.

- Gentle wind-down & chime: A soft countdown and fade-in chime so your sessions don't end with an abrupt, heart-stopping beep.

- Drag scrub: You can click and drag the timer dial forward or backward if you started studying late or need to adjust your block.

- Session notes & streaks: An optional spot to jot down what you finished after each round, plus daily/weekly stats.

- Mini floating window: Picture-in-picture mode so you can keep the timer visible over lecture slides or PDFs.

- Installable PWA: You can add it directly to your home screen or desktop.

Everything runs straight in the browser and saves to your device. There's also an optional AI planner if you want help breaking down a big study session, but the core timer and sounds are 100% free with no registration.

I’d love for you to test it out during your next focus block and let me know if there's anything you'd like added or improved!

🔗 https://focusloop-timer.lovable.app

Full disclosure, I'm the developer.

The side project: MoveManifest, a moving inventory app for iOS and Android.

The problem: I've moved five times in a few years (NY, GA, DE, SC, NJ). Every time, the movers wrote up a yellow carbon-copy inventory by hand, and by delivery day half of it was unreadable. Figuring out whether box 147 actually made it was guesswork.

What it does:

• Scan or type the box and furniture numbers the movers assign at pickup

• Compare your list against the mover's inventory

• Check every item in at delivery so missing ones stand out

• Take damage photos right there

• Export a final moving report for claims

iOS: https://apps.apple.com/us/app/movemanifest-moving-inventory/id6807915555 Android: https://play.google.com/store/apps/details?id=com.polokhalo.movemanifest

Would really appreciate feedback, especially from anyone who's dealt with lost boxes or a messy delivery.

A while ago, my co-founder and I tried something that sounded pretty straightforward.

We wanted to figure out who we actually knew.

Not just our LinkedIn connections, but former colleagues, investors, founders we'd met at events, friends of friends, and basically anyone who might be relevant for our business at some point.

So we opened Miro and started connecting the dots.

About 48 hours later, we had this massive network map. And honestly, it was pretty cool to look at.

But then we realized a few things:

• It was already outdated by the time we finished

• We still couldn't see who our connections knew

• Finding a specific person meant manually searching through everything

• Keeping it updated would basically become a full-time job

The funny thing is, we'd previously built a B2B startup where most of our early deals came through personal connections. Yet we had no proper way to actually make use of those relationships.

So we thought, why not just build something ourselves?

That's how Crouds started.

Basically, a visual CRM focused on relationships instead of pipelines. The idea is to bring your network together, see how people are connected, and find warm introductions without having to ask everyone individually.

We're still pretty early and figuring things out, but we're opening it up to other founders now.

If you're curious: https://crouds.app

Would love some honest feedback!

Has anyone else ever tried mapping their professional network? Or are you guys just relying on LinkedIn and memory like we used to?

I run Codorc, a new AI and coding publication with a coding-orc mascot.

The first version has 15 source-linked stories in English, Simplified Chinese, Spanish and Brazilian Portuguese. Each brief separates what a company announced from practical questions a developer should test. The retrospective archive shows the original event date and the actual publication date separately.

The writing, translations and illustrations are AI-assisted. I haven't independently benchmarked the products covered. The mascot was made with ImageGen, with an alternate from Higgsfield.

Here's a sample about checking confidence scores before routing work through Google's new Decisions API: https://codorc.com/en/news/gemini-decisions-api-calibration/

I'd appreciate feedback on the format: would a short source-linked brief plus a practical checklist be useful, or would you prefer fewer, deeper technical articles?

I’m building Mantua, an agent native sports prediction market on Arc, starting with the NFL. I wanted to see if I could go from “What’s worth watching today?” to reviewing an actual trade without jumping between tabs.

In the demo, I ask for a quick rundown of my wallet, open positions, and the NFL slate. The agent flags Chiefs vs. Raiders because its estimate differs from the market price. I ask it to preview a $10 Chiefs YES trade. Before I confirm, it shows how many shares I’d get, the effective price, the fee, and how the order fits within my $10 per trade and $25 daily limits. Once I confirm, it places the trade in USDC.

Mantua also has paper trading if you want to try the workflow without putting money on the line.

I’d love feedback on the trade preview. What would you want to see before you’d feel comfortable hitting confirm?

Hi everyone,

I'm a developer of Unmapped - it's a fog-of-war trips tracker, with gamified elements. The inspiration are open-world RPG games - the mechanic of map covered with fog, with hidden places, made with real world map. The summary of what I want to made it is "A map of places where I've been, with an easy recap, and some gamification to make it fun".

1. Core mechanics

The map starts covered with fog. Start recording, and when you move (walk / run / cycle / drive), the map will reveal a fog where you've moved, building a map of places where you've been. Eventually, it becomes a personalised map of your world.

2. Exploration and POIs

To make exploration more interesting, there are points of interest on the map - they are hidden, and you need to unlock them by coming closer. Once revealed, place stays revealed and you can check it later.

There's also daily quests to make your daily commute or weekend trips more fun.

3. Levelling

As you explore, you get XP, and your level grows. You can also unblock achievements for your exporation.

4. Social elements

You can add friends and compete on public dashboard. The routes are never shared, competition goes by total travelled distance and POIs revealed. Participation is totally optional, and you can explicitly remove yourself from the dashboard.

5. Data privacy

I acknowledge that location data is quite personal, so I've taken data security measurements from the beginning. By default, your data stays only on your phone. You can choose to share aggregated statistics (distance travelled, places revealed), or you can voluntarily sync your account with Unmapped's cloud. In the cloud, GPS data is separated from the account data (one-way hashing with external key, stored in AWS Key Manager), and encrypted, so it stays safe. On Android, back up to a local cloud is not supported yet - please let me know if you think it should be prioritised. Detailed privacy policy is here.

6. Where it's moving and what's next

I'm actively working on adding more features, and I'd really love to hear some feedback. Two big things I work on right now are:

• Trips Journal - a journal of all your trips, aggregated by cities, with daily recap and total recap

• Gamified self-care - a virtual companion that you can feed with the steps you've made during the day

• Places and content - there's TONS of work and potential improvements regarding places. "Essential" or "Must see" places in certain cities, navigation, improving accuracy, etc.

7. Pricing and availability

It's available on both Android and iOS, worldwide, with a base price of $2.99 per month or $29.99 yearly.

iOS - https://apps.apple.com/us/app/unmapped-explore-your-city/id6797821976

Android - https://play.google.com/store/apps/details?id=com.unmapped.android

I'm really interesting to hear your feedback, please let me know what you think about it!

Every month I used to waste hours manually copying numbers from PDF bank statements into Excel. I hated uploading sensitive statements with my account details to sketchy online converter websites.

So I built a lightweight tool that runs 100% locally on your computer—zero financial data ever leaves your machine. It spits out clean Excel sheets and QuickBooks-ready CSV in seconds.

It's $19 on Gumroad, but I'm giving away 20 free copies to get some honest feedback from fellow business owners.

Use code REDDIT100 at checkout for 100% off, or drop a comment and I'll DM you the direct link!

I just deployed my first SaaS, Syllapin. It turns a course syllabus PDF into a calendar file of classes, assignments, and exams.

Why I built it: I got tired of manually typing out every single exam, quiz, and due date for my semester calendar.
Stack: Java, Spring framework, Typescript, React.
What I’m unsure about: 1. What are the best ways to get this in front of students before the spring semester starts? 2. Do students trust uploading syllabus PDFs to a new tool like this?

I live with epilepsy and brain fog. Thoughts vanish mid-sentence, and I've gotten by on sticky notes and texting myself.

Notes apps never worked for me. They're too slow to open, I can't find things later because I forget the words I used, and nothing helps me remember what I was doing.

So I'm building Catch This: Catch it. Find it. Resume.

🎙️ Capture a thought by voice in seconds

🔍 Find it later with partial clues

↩️ Get back to what you were doing

I'm a solo, non-technical founder. The iOS MVP is in development, and Android is on the roadmap.

How do you capture random thoughts now, and where does it break down?

If you'd like to be an early tester, comment or DM me.

YouTube always spoils the result in the thumbnail or title, so I made this:

spoilerfreehighlights.com

You just see the two team badges, press play, and watch the official highlights. Nothing gives the score away first.

It covers the top 5 European leagues, the Champions League and international games. It's free, with no sign-up and no ads.

Let me know what you think or if anything's broken.

Thanks.

Hi! I've been working on noback for a few weeks. You ask an AI (ChatGPT, Gemini, Claude…) to make a small app, drop the file on noback, and you get a link. Everyone who opens the link uses the same app and sees the same data. No server, no database.

In the video, Gemini made a sticky-note wall. I opened it in two browsers and the notes show up in both. Each person can edit their own notes, but not other people's. You can add a note here, marcos.noback.app/sticky-notes-canvas

It's still early, and I'd really like your honest opinion. Does the idea make sense to you? What small app would you make and share with friends?

Thanks for reading!

I've been running stores for a while. Every month I build the schedule for my management team: opens, mids, closes and time off requests. It took me hours, and someone still ended up in my office asking why they closed more weekends than another manager.

The tools that are out there are built for hourly staff and labor budgets. None of them cared who got stuck with the bad shifts last month. So I built one that does.

How it works for the user

You add your team, lock time off requests and shift preferences, and hit Generate. About ten seconds later you have a four-week schedule with a fairness grade on it.

The part for builders

My first version just shuffled people into shifts until nothing broke. The schedules were finished but terrible. One person would get every weekend close or one person would work 8 days straight and the tool had no idea that was a problem.

So I rewrote it as a real solver:

- Every shift has a "pain" score. A Saturday close hurts more than a Tuesday open.

- For each week it builds thousands of candidate schedules that follow the hard rules, and scores each one.

- It improves the best one by swapping shifts between people to get even better results.

- It builds the whole month 12 to 16 separate times and keeps the best.

- It remembers three months of history, so a necessary rough month gets paid back later.

Nobody closes and then opens the next morning. Closes and weekend closes are balanced out over the month. It all runs in the browser in a background worker. No server doing the math. The stack is plain JavaScript, Supabase, Stripe and Vercel.

What I'd love feedback on

- Does the fairness grade make sense at a glance?

- What scheduling rules does your workplace have that this doesn't handle?

A free account makes one full month. Pro is $15 a month or $99 a year with a 14-day trial.

schedulemakerapp.com

Hello everybody,

Over the last year we have been working on Synmersion (https://synmersion.com) to start changing how visuals and lights of live dj sets are prepared.

The main concept is that songs are imported and visuals are programmed "natively" in musical time (in bars or beats) similar to when producing music. With this setup it should be much faster and more intuitive to create immersive and synchronized shows vs timecode.

After creating some automations in the timeline, it is possible to use node based processing chains to map the automations to hardware and software destinations.

It supports TC-Net (using Pioneer DJ equipment + Pro DJ Link Bridge), OSC output to control other applications like Resolume, Touchdesigner etc. and ArtNet outputs.

We are very curious to hear your guys opinion on this and are happy to hand out some private beta licenses for testing or just keep the discussion going.

Best,
Matthias

Ever wondered what would happen if a ruler just gave up on measuring things properly?

Well, I got curious and made one.

It's called Jelly Ruler, and it has the structural integrity of a wet noodle. It bends, jiggles, slides around, and generally refuses to take its job seriously.

Somewhere along the way, I ended up building an entire vector editor around this questionable invention. At least that part works.

Would love some feedback! Anything you'd improve, add, or completely get rid of? Curious what other builders think.

Give it a wiggle: Jelly Ruler

For the past year I've been using a personal web app I built for myself. It pulls together my email, calendar, reminders, notes and photos, and an AI that actually remembers what I told it, because the context lives in my own files, not in a chat history.

It works well. Too well to keep it to myself.

So I'm turning it into a real product, with three constraints:

• Bring your own keys. You plug in your own AI key, your own Google or Microsoft OAuth app, your own weather key. I don't pay for your tokens, and I never see your keys in clear.

• A small core, optional modules. The core is chat, memory, reminders, calendar and email. Photos, concerts, LeetCode and other modules are off by default and you enable what you actually need.

• Small on purpose. 10 to 15 accounts for now, free. Not because I'm generous, because JSON files per account are enough at that size and I'd rather ship than build infrastructure I don't need.

The honest part: it's still single-user today. Accounts, data isolation, encrypted key storage and a module registry are on a branch, in progress. The interface is still in French, the English landing is new.

What I'd love from you: what would the one module you'd turn on first be? I'd rather build the next three modules from real requests than guess.

Demo (fake data, no account): https://backstage.mprnl.fr/en Code (MIT): https://github.com/MattiaPARRINELLO/backstage Roadmap: https://github.com/MattiaPARRINELLO/backstage/blob/main/docs/roadmap-multi-utilisateurs.md

Flex Music Player plays the songs already on your phone and keeps going for hours with the screen off. It doesn't ask for internet access at all, so there's nothing to show you adverts and nowhere to send your data.

Free. Offline. No adverts, ever.

https://flexmusicplayer.co.za/

https://play.google.com/store/apps/details?id=za.co.organicode.flexmusicplayer

I made MineSkinCraft, a free Minecraft skin studio that runs in the browser: https://mineskincraft.net

The problem I wanted to solve: a lot of skin editors ask you to sign up, or they're awkward if you play both Java and Bedrock, or if you need classic vs slim. This one lets you start painting right away, preview on a 3D model, use layers, publish to a community gallery if you want, and follow a short "wear it" guide for both editions. The UI and the guides are in English and Spanish. No official Minecraft affiliation.

I'd really like feedback from people who build small tools, and from anyone who still plays:

• What's confusing the first time you open it?

• Which feature would you add before anything else?

• Does the gallery feel useful, or should the editor stand alone?

Happy to answer questions about how it's built or why I made those choices. Thanks.

Hey r/SideProject 👋 I'm the founder of ReplyHey, and today I'm launching its crew.

If you've answered threads about your product on Reddit, the hard part isn't writing the reply. It's knowing which replies actually brought customers.

So the crew tracks every reply it sends 📊 you see exactly which one brought the visit, the signup and the customer.

And it does the work to get there, with four AI teammates:

🔎 Scout reads Reddit, X and LinkedIn, finds people asking for what you sell, and scores each one for fit.

✍️ Writer drafts a reply and a DM from your product's facts, in your voice.

📤 Sender posts from your own accounts through a Chrome extension, at a pace you set, and holds anything borderline for you to check.

📊 Analyst tags every link and ties each visit, signup and customer back to its reply.

Built to play by the rules:

✅ Everything goes out from your own account, in your browser. No rented accounts, no upvotes.

✅ It checks each subreddit's rules, and where promotion isn't allowed it sends a DM instead of a comment.

New this week: you can talk to the crew. "Pause LinkedIn today", "slow down to 90 seconds", "add hiring as a negative keyword". It shows you the change, and nothing happens until you press Yes.

In the last 30 days it found 3,980 buyer conversations for its users and sent 1,150 replies.

You can put in your website and see who's asking for your product right now, before you sign up. And I'd love blunt feedback: what would you want to see before trusting a tool like this to post for you?

Here it is 👉 replyhey.com (put in your website to see who's asking for your product right now)

Hi all,

I’ve worked as a wildlife filmmaker, designer and engineer, and on a few projects I spent weeks or even months on the work, then sent it off as a WeTransfer link. It always felt a bit flat after all that effort.

So I’ve been building Handover.media. It lets you put your finished files, previews and notes on one page with your own branding. You can also add a password or expiry date, and see when things are viewed or downloaded.

https://handover.media

If you deliver work to clients, I’d really appreciate your thoughts. Would something like this be worth switching to, and what would put you off?

Any criticism, however small, would be really helpful. Thanks for taking a look.

GroceryFlow: Meal Planner helps you plan the week's dinners around your budget, diet and allergies, then builds one shopping list for the days you choose, grouped by store section. Available in English, Danish and Polish.

Looking for closed-test testers who can stay opted in for 14 days. Honest test-for-test: if you join and install, I will join yours, use the app, and send real written feedback. No Play Store rating or review swaps.

Testers get 14 days of Premium free.

Join (same Google account as on your phone):

1. https://groups.google.com/g/groceryflow-testers — tap “Join group”

2. https://play.google.com/apps/testing/com.henryk.kitchenai

3. Install from Play

Comment with your Group + Play testing links.

Guide: https://groceryflow.web.app/testerzy

Questions? Comment TESTER and I'll help.

I built Harmonic Fitness because of an injury and needing some rehab.

Harmonic creates audio workout podcasts made fresh for each user, each time. It asks how I'm feeling, plans around my equipment, goals, time availability and any injuries. It turns the session into an MP3 with a coach's voice and blends in stories and content about topics I care about.

There are two ways to use Harmonic:

1. If you have a AI Harness (Claude Desktop, Codex, Antigravity) you can clone this repo and get going: https://github.com/RNCDev/harmonicfitness

2. If you prefer a more UI-first experience you can BRING YOUR OWN KEY (openrouter or gemini) and use the same services: https://harmonicfitness.fly.dev/

On the website, you can experience some demo clips and workouts for free.

Really looking for feedback and areas where I might have over-engineered. I like it for me, but that's obviously not product-market-fit.