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I built my first side project in 2022. It was a habit tracker with a twist — you'd compete against friends. I spent six months obsessing over the UI, the animations, the perfect onboarding flow. Launched it to crickets. Maybe 12 signups, all friends and family. Dead in a month. Project number two was a bookmarking tool for developers. Three months of solo building, this time I even added a dark mode (surely that would help, right?). Same story. Built it alone, launched it quietly, watched it g...

I've seen hundreds of apps you've shared here and so many of us are willing to help each other out. So I thought we should make it easier. I built 1kusers.com for us to share our own apps, test other apps, and get feedback. The idea is simple: you don't need to chase upvotes to get visibility - the more apps you review, the more visible your own app becomes. Give it a try, and I’ll personally test and review every new app posted. Would love to hear what you think. submitted by &#3...

You take off your shoes before bed. You probably don't take off your smart ring or your watch. Most of us sleep with a Bluetooth-enabled device sitting a few millimeters from our skin, all night, ever

The first time I saw "Looking up a deactivated widget's ancestor is unsafe" in a stack trace, I genuinely didn't know what it meant. I copied the error into Google, found three different Stack Overflo

Typically, when we start experimenting with AI, many of us begin similarly. We try a single LLM call as the core of an app, like this: const response = await llm.chat("Explain Kubernetes"); For a lit

Tutorials teach you how to write Terraform, but don't teach you what happens when 60 engineers start writing it together. When you learn Terraform, you work with a single repository, state file, and a

Most AI agents are great at quick tasks. Send a message, the agent calls a few tools, and you get a response back in seconds. That works perfectly when you're asking it to summarize a document or do s

Recently, I wrote a post about an educational app I'd developed using AI tools, and the design decisions I made along the way. When I showed the prototype of my activity-based learning app to a few ed

Flutter makes it extremely fast to build UIs. That speed is one of the framework’s greatest strengths, but it also creates a subtle problem: applications often grow much faster than their architecture

Imagine being able to pull any external data into Notion, seamlessly push updates to your other favorite apps, and automate complex business logic, and do this all without paying for third-party no-co

I have been working on a small side project for Instagram creators because I kept running into the same problems while trying to grow pages myself. Right now the idea is to bring a few things into one place instead of using multiple tools: Helping identify the right audience based on niche Tracking follower quality instead of just follower count Content idea generation for consistency Basic growth insights (what type of posts bring better engagement) Simple suggestions to improve rea...

So I built this app where you photograph any clothing item and it finds the same style for cheaper. Been working on it for 5 months and I’m close to launching. The scanner works but honestly it’s not that good. I have GPT-4o, FashionCLIP, Marqo all working together and it feels like a lot of moving parts for results that are only really accurate on the top matches. The rest aren’t great. It also doesn’t search Depop, Grailed or Poshmark which is kind of the whole point. Someone told me to b...

I've been working on this for a while now and I'm really proud of it, so I wanted to share it here. It's called Fleeting — a journal app for iOS (Android coming soon) built around one idea: capturing thoughts in the moment without friction, and rediscovering them later. I've always been someone who has thoughts I want to hold onto — a feeling, something I noticed, a memory — but by the time I've opened an app and navigated to the right place, the moment has passed. Fleeting is my attempt to ...

i got a random idea of why should we sacrifice our privacy by keeping notes in apps like notion, etc. so thought of building a simple local first rust based vim like notes taking app with local AI models integrated in it for RAG. is it a good idea? the demo video is uploaded above, check it out and lmk. should i release it for one time payment of $5? or just open source it? open for all kinds of feedback.

A big part of how I get early users is being genuinely helpful in the subreddits and HN threads where they already hang out. the problem is that finding the right threads to reply to by hand is a slog, and I would usually miss most of the good ones. So I built a tool to do the finding for me, and it is called ThreadHunt. How it works: - You tell it what you are building and the kinds of conversations you care about. - It watches Reddit, Hacker News, X, Indie Hackers and dev. to on a schedu...

Every Premier League season, my friends and I run a prediction competition, everyone calls the scorelines, points get tallied up, and the winner gets bragging rights. The problem was that it always lived in a messy WhatsApp group with someone tracking scores in a spreadsheet that inevitably ended in an argument about who got what. So I built Punditz to handle it properly. You predict scorelines, spin up a private league with your friends, and it does the scoring and leaderboard automatically a...

https://json-to-excel.com started out at RapidApi. II got over 100 free users so decided to build out the site and add subscriptions. I’ve been a software engineer for over 10 years so the technical side is the easy part. The difficult part for me is time and marketing. Like many I have a family and a full time job so finding time has been difficult. It may be a couple of days or month or two that passes before I get a chance to spend a couple of hours on it over the year progress has been sl...

https://alcinoluiz.github.io/httpoke Artists: If you see your art here, please DM me so I can credit you properly!

I've been following the 2026 World Cup but I don't really know the teams and play styles. I built a simple website that's easy for casual viewers to follow and understand a bit more. Would love any feedback! https://world-cup-simplified.vercel.app

I made a booking/appointment management SaaS. Not a big deal, I guess. I built it using Lovable and tried not to make Al slop.The coding part was only one piece of the puzzle. Pricing, billing, permissions, subscriptions, edge cases, onboarding, database design, and all the little details took much longer than I thought. Every time I fixed one thing, ! discovered three more things to learn. The project is ZenSched. It's a booking management platform for businesses that need appointment sched...

Hey everyone, I just graduated EE and I'm starting my Masters in September. The whole degree I kept getting annoyed that there was no good place to just plug in numbers and solve a formula everything online is either a static PDF or some ugly outdated calculator from 2008. So I built one myself: EE Formula Hub 220+ interactive formulas across circuits, machines, power electronics, control systems, signals, and more. Pick a formula, enter what you know, it solves for the rest. There's also ...

Rotation mechanic: when a piece falls to the right, the board rotates to the right, and vice versa. If it falls to the center, it will not rotate. I saw a cool concept by the creator Freya Holmér where the board spins, but figuring out how to clear the blocks was left open. I wanted to turn that idea into a full game, so I designed my own way to make the pieces disappear. After testing a few concepts, I narrowed it down to these three modes: Avalanche: You clear blocks by filling a sp...

Hi Everyone, I needed to fix my phone habits and stop doomscrolling, especially during focus hours. Yes I can delete the distractions, but some social apps are the only way I communicate with certain friends and family members. I needed them on my phone, I just needed them out of my way at certain times. So I built a custom launcher for myself called KapsL. Instead of a regular home screen, it lets you group apps together into "capsules" that you can lock down at certain times. ...

I'm tired of web platforms forcing us to upload everything to the cloud. So, I built LensLaber , an offline-first computer vision annotation tool. I developed the whole thing on my everyday laptop: an old 2015 Asus X550LD (i5, 8GB RAM, 120GB SSD). I wanted to prove you don't need an expensive GPU workstation for AI labeling. By optimizing the architecture, YOLO + MobileSAM run locally on standard CPU using just 600-900MB of RAM. You just bring your own YOLO weights in ONNX format. Harry Rat...

I've been working on a project for a few months and realized most of my time goes into fixing edge cases instead of building features. Curious what other solo builders struggle with most.

Been building a men’s activity app for a few months, about to quit though The idea: men tell us when they’re free and what they want to do (golf, fishing, pickleball, etc), app groups them with nearby guys. $10/month. There is also a “map” that displays forming groups in your area for various activities and you can join those groups. Thought it was different because it’s men only, activity-first so it doesn’t feel like a friend finder, and uses demand aggregation instead of event posting so ...

Solo dev here and I have a focus problem. Instead of going deep on one thing, I keep shipping small free tools. An IP/privacy tool, an AI pet game, an AI trends tracker, a crypto liquidation feed, and now a meme maker. The meme maker is the most on-brand silly one yet. The reason behind all of them is the same: free, and no signup, because I'm tired of handing over my email just to do one tiny thing. So that's all it is. Pick a template or upload your own, add text, download. It's called justm...

My team has been using Lusha for like 8 months now and its getting ridiculous. started with thier pro plan thinking 480 credits would last but im burning through them in less than 2 weeks. feels like every click costs credits even when the data comes back empty. the accuracy is decent when it works. Probably get good emails maybe 70% of the time. but mobile numbers are super hit or miss, maybe 1 in 5 actually connect. and dont get me started on the chrome extension randomly logging me out mid-...

Hi everyone, I built a dedicated social media platform exclusively for men. From my own day-to-day experiences and observing online trends, I realized there isn't really a centralized, intentional space for men to share goals, seek advice, or find mentorship. Women are incredible at building supportive communities for themselves, and I wanted to create something similar for guys. Last weekend, I sat down, started vibe coding, and built out a foundational version of the platform. I'm not doin...

Hey r/SideProject , I got tired of site audit tools putting basic security and health scans behind expensive paywalls. So I built AuditMetric . The core platform gives you 3 free audits every single day , technical SEO audits, and unlimited CVE vulnerability checks to ensure your site is secure from known exploits. To prevent bot abuse on heavy data-scraping endpoints, we use a cheap, prepaid credit system for advanced modules Keyword Strategy (Search intent and organic targeting), ...