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Hey everyone! Building a SaaS is hard, but getting honest feedback is even harder. So I thought it'd be cool if we helped each other out. Drop your SaaS in the comments and include: • What your product does • Who it's for • One thing you'd like honest feedback on I'll personally review as many as I can and leave constructive feedback. If you share your project, please take a few minutes to review someone else's too. Let's help each other build better products. submit...

I made this little thing when I was bored...It quietly shows a handful of real aircraft passing near you and of course with time and weather. It’s not very useful tho. https://github.com/jasonlx327/passing-sky

I'm not even sure how to explain this properly but I'll try. Built something for months completely alone. No team, no co-founder, nobody to reality check anything. Just me and whatever made sense in my head. Thought I understood the product deeply. Knew every corner of it. Could explain any decision I made and why. Put it in front of people last week for the first time. First guy spent maybe 90 seconds on it then pointed at a feature I had hidden three levels deep because I thought it wa...

Hi Reddit, A few years ago, I published an app that let you play laser tag in real life. Back then, the targeting was a bit shabby because of the limited performance of vision models, so I opted for a gyroscope + location only approach. It was good enough but it had a few serious accuracy limitations that didn't make the game as enjoyable. Also, Flutter GPU and Impeller were still a very new work in progress, so the game was more 2D objects moving on the screen with perspective tricks instead...

Side project I've been putting a lot of hours into: Ping, an Android app where phones talk directly to each other over Bluetooth — chat, GPS location, photos, even SOS broadcasts — with no Wi-Fi, no cellular, no backend server anywhere. Every phone running the app acts as a relay, so a message can hop through several other people's phones to reach someone who isn't even in range of the original sender. Started it because I kept thinking about how fragile "communication" actually is the...

TL;DR https://vylite.app . Vylite is the desktop continuation of Meros, the notes app I shared here in this subreddit 8 months ago. I've spent those 8 months rebuilding it four times, and iterating on each rebuild a dozen times, and this is where it landed. It's inspired by the terminal: minimal, instant, one thing at a time. It opens to a single input line. Notes are local plain markdown files on your device. There is zero telemetry, no user analytics, no server, and notes are ...

Yesterday I posted my first app here, a screenshot tool. The kind of app that hooks the mouse and types into your windows. So you can imagine my morning when my computer started typing BY ITSELF. Spaces pouring into the chat box, screenshots firing that I never took, my dictation app choking. For an app like mine, "it types on its own" is the scariest bug that exists. I'd just put a download link on the internet. So we went full forensics mode, me and the AI I built the app with: K...

My husband and I built a book tracking app to address all the things I’ve ever wanted out of goodreads. Chiefly, a virtual shelf with actual spines that looks like my bookshelves at home. As shown in the video, you can drag books around, lay them flat, face them out, add decor, etc. Test flight: https://testflight.apple.com/join/nAgk2SDN Play store: https://play.google.com/store/apps/details?id=com.fisherbirdsoftware.shelflife I don’t think a large public database of spines exists so I...

After seeing a voxel experiment on X, I had this random idea: what if I could build a Zoo Tycoon style game, but set across floating islands, each with its own biome and animals? This is just a very early, completely random prototype made in a few prompts. I think it’s going to be incredibly cool when, in a few years, anyone can create the exact game they have in mind just by describing it.

Hey everyone, I’m a solo founder from Georgia, and today I launched Azrivo on Uneed. I started building it because I kept running into the same problem with AI assistants: one model would often accept the way I framed a question and return one confident answer, even when the decision needed opposing viewpoints. Azrivo gives you four ways to work with AI: Ask one specialist directly Compare several specialists in Panel mode Have opposing specialists debate and produce a verdict Gi...

I spent months building my first app. In my head I imagined friends asking for updates, people trying the beta, lots of feedback. Reality: I sent out TestFlight. Three people downloaded it. None of them came back. It wasn’t devastating, just frustrating. It made me realise that building the product is only half the job. Getting people to care is a completely different skill. Curious if anyone else’s first launch was equally underwhelming. And any indie dev hacks you guys could shar...

It was totally useless before, now its only slightly useless. Now some ghosts appear as you browse around. On PC, use W-A-S-D keys, SPACE, SHIFT and mouse to explore. On mobile, you will have instructions on screen. https://anshs.github.io/matrix-rain/

The main parts are an ESP32 attached to a hall sensor, which I positioned close to the wheel. Using a magnet attached to the back of the wheel, this tells the ESP32 when a full rotation has completed. It gives a timestamp (and total distance) to each magnet-pass, which is stored on the network. A python script (on my laptop) then retrieves this data in the morning, turns it into a .FIT file, and uploads it to Strava through the Strava API (with a randomly chosen run title, taken from a mostly AI...

If you ask ten junior developers how OAuth 2.0 works, nine of them will start reciting terminology like "Authorization Server", "Bearer Tokens", "PKCE", and "Implicit Grant". They might also draw a se

Antigravity Agent Skills are a great way to teach your AI agent a workflow once and reuse it everywhere. You write a short SKILL.md file, drop it in a folder, and the agent picks it up whenever it's r

Large Language Models (LLMs) have fundamentally changed how we build modern software. But relying on a single AI model for every user request creates serious production risks. API outages happen. Prop

Building production-grade forms in React can be a painful experience. It's one of the parts of front-end engineering that most developers are uncomfortable with. Usually, you'll start with a simple co

Here's a line from an official document published by the people who run the internet: "Readers who cannot distinguish satire by reading the text may have a future in marketing." This line actually s

Additive manufacturing has evolved into a cornerstone of Industry 4.0 and modern industrial production. Whether it's light-weighting aerospace turbine components, printing custom titanium medical impl

For many developers, the AI workflow looks something like this: write a prompt, get a response, copy what's useful, and move on. This covers a surprising range of tasks, from summarizing a document to

If you’ve ever spent two days pulling data out of an APM tool just to answer “how many virtual users should I run in my load test?”, this tutorial is for you. By the end, you’ll know how to derive eve

Tracking flood risk takes one unglamorous but essential thing: clean and structured data. In this tutorial, you'll build a data pipeline yourself. You'll create a Python ETL (Extract, Transform, Load)

In this book, you'll build a fintech transaction ledger from scratch and progressively transform it into a production-ready DevSecOps platform. You'll also deploy it on AWS. The app processes credit a

If you've ever tried to build a robotics system that can actually see, track, and respond to the world around it, you know that the hard part isn't training a detection model. The hard part is making

Last year, a client asked me to add a conversational interface to their internal reporting tool. Staff would type a question, and the system would pull a live answer from the database. I had the first

Most developers begin their automation journey similarly. They create a script that performs a helpful task, such as pulling data from an API, resizing a batch of images, or emailing a report, and the

In this tutorial, I’ll show you how prompt engineering and context engineering can improve an AI agent's performance. We’ll build a simple local agent, start with a baseline input, then improve it wit

Many PDF documents contain information that shouldn't be shared publicly. Personal details, financial figures, signatures, addresses, account numbers, employee information, or confidential business da

Every developer eventually encounters the same frustrating problem. A customer reports that your application is failing in production. You try the exact same workflow on your development machine, but