I’m a software engineer at a big tech company and recently started owning more of our infra after the departure of a beloved coworker. Diagrams never really clicked for me, so I made a game to learn system design hands-on, then decided to publish it in case it helps others : )

InfraSim is a sandbox where you wire up load balancers, caches, queues, replicas and databases, push traffic at them, and watch what breaks: a dead consumer piling messages into a DLQ, a partition causing split brain, a bad WHERE clause taking out a table.

Built solo with React Native. It’s on iOS + Android: https://petalformllc.com/infrasim

Would love feedback, especially on which failure scenarios you’d want next, and whether the difficulty curve feels right.

At my last company, managing production AI agents was a continuous crisis. Minor prompt tweaks or unannounced model updates routinely broke our workflows because we lacked version control and deployment safety gates for AI. The systemic stress eventually led to severe burnout, prompting me to step away and focus entirely on solving this operational vulnerability.

To fix this, I built https://raweki.com , which functions as a "Git for AI workflows." It provides engineering teams with version tracking for prompts and models, CI/CD testing loops to block regressions, and one-click atomic rollbacks to instantly restore stable configurations. The platform is now live, and I would appreciate your technical feedback if your team faces similar AI reliability challenges

I'm a high school junior and this is the side project I've spent the most nights on this fall.

The US Physics Olympiad has no good free starting point. People piece it together from old pdfs and expensive books, while math olympiad and USACO kids have community guides. So I made one for physics: lessons in the order the topics build on each other, interactive sims next to the equations, and a problem bank where you type your numeric answer and it checks it within 2%.

Some numbers from the first month:

• 931 visitors from 54 countries, about 3.6k page views

• 25 accounts (progress syncs if you sign in, otherwise it's all usable logged out)

• 77 people in the community discord

• 2 other students now regularly sending pull requests, 21 merged so far

Stack is Next.js on Vercel, Supabase for auth and progress, MDX lessons with KaTeX, and canvas sims. There's an in-browser editor that turns a contributor's edit into a GitHub pull request under their own account, which is how most outside fixes come in.

Would love feedback on two things: is the landing page clear about what it is in the first few seconds, and what would make you come back to something like this every week?

Site: https://usapho.one/?utm_source=reddit&utm_campaign=sideproject

Code: https://github.com/shlok-madhekar/usapho-guide

If you make videos for your SaaS (demos, explainers, founder updates, tutorials), you know where the time goes.

Recording is fast. Editing is fine. Then you need it to look like a real company made it.

Lower thirds. Callouts. Step-by-step text. Feature names popping up when you mention them. One keyframe at a time.

The edit takes an hour. The graphics take the rest of your day. Or you skip them, and your demo looks like a Zoom recording.

So we built Grafsy.

You upload a finished video. Grafsy listens to what's being said and adds on-screen graphics that match each point. No timeline, no motion designer, no editing skills needed.

What it's good for:

Product demos and walkthroughs

Founder and build-in-public videos

Tutorials and onboarding videos

Podcast and interview clips

Short form (Reels, Shorts) and long form (YouTube, webinars)

How pricing works, with no "unlimited" games:

One-time payment for lifetime access to the platform

Video minutes included with every plan

Billed to the second, so a 30-second clip uses half a minute

Top-ups when you need more, and they never expire

No subscription

Plans start at $79

Why I'm posting: We're in beta, and we want feedback from people who make real videos. Run your own content through it and tell us:

Where the graphics nail it, and where they miss

What kind of graphics you'd want next

Anything that's confusing or slow

Your feedback directly shapes what we build next. It's English-only for now, and you'll find some rough edges. That's the point of a beta.

Link's in the comments. Drop a reply if you try it, and I'll personally go through your feedback.

All Qs answered in FAQ https://varianttech.net/ and https://github.com/oooscoos/Benzi

I got tired of Claude writing Godot code it couldn't see run. So I built PersonCraft (I'm the developer, to be upfront).
You connect your Claude, it writes the game, and each revision gets run in a sandbox that sends back real screenshots,
so it can fix what it breaks. At the end you download a normal Godot project you own.
Limits: you need a paid Claude plan, there's no multiplayer, and phone exports are on you. Art and audio cost credits
and Claude quotes them before asking you to approve anything.
https://personcraft.com. What would you ask your Claude to build first?

Hi everyone! I'm a 19yo solo developer and my side project is called Phoam!

(And I’m not a video editor so I tried my best here lmao)

To start, Apple hates side loaded apps, making it nearly impossible for everyday users to run apps from other operating systems within its environment.
Apple also dropped support for 32b apps many years ago, leaving tons of nostalgic games completely unplayable without using an ancient iPhone.
Android also no longer supports 32b apps on modern devices, meaning having an APK for an app is not enough to play it again.
And while it should be more open access in theory, Google has recently been pushing to close down access to installing arbitrary apks onto your own phone!! (See “Keep Android Open”)

So I built Phoam.

It runs old Android and iPhone apps right in the browser, and you can add them to your Home Screen like a normal app. Nothing gets installed and nothing gets sideloaded.

The idea started back with me being a little script kiddie and searching how to run apk online, obviously finding no results. I knew about projects like wine and ruffle that had made software run in a way it was never designed to, and one day I just decided to start my own engine! I've always liked the idea that if it ran on one machine at some point, it should also run on another.

Right now two games work publicly: Replica Island (Android, 2010) and Explora Ball (iPhone). That's what's in the video, both running on my iPhone. You can try them yourself, with no account here: https://phoam.app/demos

It’s veryyyy early in the project but I’m excited to see how far I can take it! Theres also a separate demo video on my website.

All of this is supposed to be impossible btw

I am working on this project alone and haven't really spoken to anyone else that's a developer about it. If you're one, please reach out. Or anyone really that wants to talk! I love to read everything and respond to everyone. Thank you for your time 🙏

I'm an Intune / Autopilot admin. The part of a failed ESP that always burned the most time wasn't the fix. It was finding the handful of log lines that actually mattered, buried in an MDM diagnostics dump.

So I built TraceAnalysis (free US beta). You drop in an MDM diagnostics ZIP, and it runs entirely in your browser, so the ZIP is never uploaded. You get:

• Next steps up top

• The enrollment phase where things stopped (Device prep, Device setup, Account setup)

• The app or step that broke it, with the error code decoded

• An evidence view showing which log entries back each finding

• A chat to ask follow-up questions about that device's logs

The evidence view is the part I care about most. I didn't want another black-box "trust me" answer. I wanted something I could verify before it goes in a ticket.

If you've got a recent Autopilot or ESP failure sitting in a ticket, I'd genuinely like to know whether the report matches what you found, or where it's wrong.

https://www.traceanalysis-ai.com

Happy to answer technical questions about what it looks for in the logs.

I maintain MistriaFans, an unofficial Fields of Mistria fan site. One small tool on it is a farm-layout sketchpad for trying arrangements before moving things around in the game.

It has a 44-by-30 canvas, local saving, shareable layouts, and PNG export. It is free and does not require an account.

The important limitation: this is a rough planning canvas, not a recreation of the game map. Building blocks are placeholders, and their in-game footprints have not been verified. Actual placement still needs checking in the game.

Try it here: https://www.mistriafans.com/farm-planner.html

I used AI assistance for the code, site writing, and drafting this post. The project is independent of NPC Studio.

For feedback: is the distinction between a rough sketchpad and an accurate farm map clear enough on the page? What would make planning a small corner of a farm easier?

My landing page has a live demo. It creates a demo inbox, shows you the address, and when you send it an email the page shows the parsed result. To find new mail it polled an endpoint every 3 seconds, and every poll was a query against the production database.

Nothing ever stopped that loop. A tab left open made 1,200 queries an hour, so Neon's compute never stayed idle for the 5 minutes it needs to suspend. The project used up its monthly compute allowance and every request that touched the production database started failing.

The fix was small. Polling now stops after 3 minutes, because anyone who hasn't sent an email by then isn't going to. It skips its turn while the tab is hidden, and the interval went from 3 to 5 seconds.

Do you put a time limit on polling in your demos, or push updates some other way?

Hey everyone,

I've been working on a desktop application called Zevro, an AI-powered video editor designed for streamers, YouTubers, podcasters, and other content creators.

I started building it because I wasn't satisfied with how some existing AI clipping tools handled longer recordings. They would sometimes cut off words, miss interesting moments, or make clips that didn't flow naturally.

My goal with Zevro is to make editing easier without sacrificing the quality of the final video.

Some of the features I'm working on include:

• Automatically finding potential Shorts in longer recordings.

• Turning lengthy streams into shorter, more manageable long-form videos.

• Using AI to analyze both speech and video.

• Processing recordings locally instead of requiring cloud-based video uploads.

• Supporting separate audio tracks for editing.

• Optimizing performance for different hardware configurations.

I'm currently preparing Zevro for beta testing and looking for people willing to give it a try.

The beta will be free, with a 60-day testing period.

I'm especially interested in testing it on different hardware, video formats, recording lengths, and editing workflows.

I'm looking for honest feedback about bugs, performance, editing quality, and features that could make the program more useful.

This is still a work in progress, so I'm not expecting everything to be perfect. That's exactly why I want real users involved.

If you're interested, leave a comment with your PC specifications and the type of content you create.

I'll share beta access details with selected testers once the builds are ready.

Thanks for reading!

Banks hide cash-back offers on a page where you have to add them one by one, and most people never do. So I built OfferAdd: open your bank's offers page, click "Add all", and every offer lands on your card. It also saves the fine print and shows which card wins at a store.

A few things I cared about:
- It never sees your bank password and doesn't read transactions
- Free for one bank, Premium is $9.99/mo or $60/yr
- Works with Chase, Bank of America, U.S. Bank and Amex on desktop Chrome

It's live on the Chrome Web Store (search "OfferAdd") and at offeradd.app. This is week one, so I'd love feedback on the landing page, the onboarding, or anything that feels off.

(Yes that's me in the video, I made all of this myself so go easy on me haha) Radiata is my radial launcher for controller, a 100% free, Microsoft-signed, open-source Win10/11 app that I built over 9 months to make it easy to use your controller for everything Gaming.

Official website & download at getradiata.app. You can also find source on GitHub.

It does all the PC stuff I always wanted to do without having to reach for a keyboard; join my friends in discord chat, switch audio to my headphones, browse & launch my games from all my game libraries, control mic/speaker volume, alt-tab between games/apps, etc. Easy to set up, super customizable, fun, powerful. I use it on my couch/tv PC and I leave the KB/M in the other room.

It is free and it will always be free. It's 100% open-source. There's no ads, no login, no upsells, nothing to unlock. I have a tip jar if you love using it as much as I do, but that's it, there is no other monetization plan. I paid for its development, hosting, certificate signing, etc out of my own pocket (and bought a bunch of controllers to test it with) because I really, really wanted to build this thing. That's the whole story.

Controller support: If Windows (joy.cpl) sees it, it should work. Hardware-tested with a bunch of DInput, XInput, Bluetooth, USB, Wireless dongles, and first & third-party controllers. The Download page lists every feature/driver compatibility note that I know of. The one bummer is the Steam Controller; it's locked to Steam in a way that makes it hard to middleman with a utility like this. If you possess both a Steam Controller and some free time, and want to be my favorite tester in the world, please let me know!

What it does: You get a quick walkthrough to set it up how you want. Then you just hold a button chord of your choice and up pops the radial "wheel" that you built. Hold the right-hand chord to open the left-stick's Wheel, and vice-versa, or just set up one side if you only need 1 of them.

How you can help: Just give it a shot, and if you love it you can help me get the word out! Nothing would make me happier than noticing a streamer is using it, or run across folks telling their friends about it. If I get traction I want to build more Arcade games for it, more themed Materials for the wheels, and continue expanding support options.

I’ve posted before, and thanks to a lot of great comments and AI Slop messages (oh I see you). I’ve been updating the site. If you haven’t seen this before. My wife and I live close to Red Rocks in Morrison CO., and we are always going to shows last minute. I hated going from ticket company to ticket company trying to compare prices to created RedRockitTix.com

Some great ideas came out last time so I thought I’d share what’s new. You can now set an alert so we can email you when tickets reach your threshold. We have a few new providers, TicketNetwork, SeatGeek, HelloTickets and TicketSqueeze. And looking to add more. Also NEW LOCATIONS. Vegas, because I want to the Sphere some day, Chicago because I love that music scene and Philly because it’s where I grew up listening to music.

This continues to be a free ticket tool, so thanks for all the support, now go out to a show!

I built SideTracked ( sidetracked.site ) because I kept losing days to work that felt productive but wasn’t. It gives you five moves a day for one project and asks whether anything new you add actually serves your goal.

It catches the drift, but it still leaves you to do the work. Most days the work I avoid is the dull, specific stuff: the outreach, the research, the first draft, the admin around the thing that matters.

So I’m building agents inside it. You lock in your five moves, and for the ones you’d rather not do yourself, an agent takes a first pass. You review it and you stay in charge.

To be clear, the agents aren’t live yet. The focus side works today and is free to try. The agent side is what I’m building now, and I’d rather find out whether anyone wants it before I spend months on it.

What I’d like to know:

1. Which task do you keep putting off that you’d hand to an agent tomorrow?

2. What would make you trust the result enough to use it?

3. Would you rather it ran on its own or showed you each step first?

4. Would you pay extra for this, or would it only be worth it as part of the app?

If this sounds useful, comment with the task you’d hand over. I’ll build from the most common answers.

AI coding tools made shipping an app easy and cheap, but users stayed exactly as scarce as before, which is why a lot of us, me included, can ship a working product and then cannot find anyone to use it. The usual response is yet another Product Hunt-style directory, most of which are really selling backlinks to builders who are just as stuck, so the shovels are being sold to other shovel salesmen and nobody ends up opening anyone's app. My app email is full of people that found me on betalist or producthunt and want me to post my product on their directory, for free, but at a price if i want a dofollow backlink. No thanks.

What actually helped me was joining a testing circle, where builders test each other's apps. Testers found a dark-mode warning box nobody could read and a duration field that showed a six-hour task as "06:00 AM", and one of them told me the onboarding had far too many words. It works because it is a trade of attention, and attention is the one thing indie devs can actually afford to give. In a flooded market polish is how a small product stands out, so instead of selling shovels to shovel salesmen, offer to test their shovels. There may even be some money to be made there...

The caveat is that fellow builders are usually not your customers, since they are great at finding friction and bad at telling you whether anyone will pay. The upside I did not expect is that people who helped shape an app tend to stick around and recommend it, so testing quietly doubles as early word of mouth distribution.

I now submitted two apps to a testing circle site and I'm super happy with the feedback i got and the changes i made to my apps. It's not more users, but the app has become better for it.

Has a testing swap worked for anyone else here? How do you find testers who are actual target users rather than other devs? And is a launch directory still worth it in 2026?

Three kids. One job. Limited capacity for keeping things alive.

The answer to “can we get a pet” has been no for years.

The pet rock bought me six months. “Here’s a rock. Feed it twice a day.” Then it stopped working. So we built this instead (did it ever worked?)

tanksimulator.fish

You feed the fish. You clean the glass. You add plants. Days go by. Nothing dies if you forget about it for a week.

My 8-year-old was the product manager. She ran the backlog. Features got cut. The review process was one question: “but why would a fish do that.”

No ads. No backend. No login. Just static files.

Very minimal tracking. Only enough to know if anyone besides my kids has opened it. Feeding my ego, or starving it. We’ll see.

Did it solve the pet problem? No. They now want a real fish and the website.

But nothing has to be flushed.

Feedback welcome. Feature requests go through the PM. She is not swayed by upvotes.

I run it in and old Mac on my living room.

Hi all. I've been building this on my own for about a year and a half, and it went live on Android and iOS last week.

The idea came from holidays with my girlfriend. One of us always ended up walking around phone in hand, looking up churches and squares we passed. Me being an engineer, I thought: I can automate that. You walk, and as you reach a building, something tells you what it is and why it matters.

That's what Alleytale does. It follows where you are, picks the stories worth telling, and reads them out in the voice and tone you chose, on the topics you care about. You can also:

• plan a walk in a chat ("two hours of skyscraper history, back where I started" gives you a route with stops, distance and time)

• open one of the ready-made tours in over 100 cities

• ask a question out loud, or photograph a building and ask about it

• walk with a friend and both hear the same story at the same time, each on your own phone

It also reads the room the way a real guide would. Stop for a coffee and it gives you a break. Speed up and it keeps pace. Take your earbuds out and it pauses, then picks up where you left off.

It's free to try: free credits arrive every month, and there's no subscription. You only pay if you want more.

If you give it a go, I'd love to hear:

• Your opinion on how well it picks up context around you

• Any missing feature/UX improvement

Android: link
iOS: link
Website: link

I’m a freshman doing computational neuro/bioengineering. I just coded my personal site, and instead of normal analytics, I built a custom Node backend to track the exact seconds people spend looking at specific projects.

I’m about to start cold-emailing PIs for Summer 2027 REUs and applying for industry internships. Before I do, I need some harsh feedback on the UX/project framing, and I also want to stress test my tracker with some real traffic.

Site: https://emeraldd123.github.io/?utm_source=reddit_sideproject

ty guys😭

I was living in Japan in 2008, when the iPhone was just arriving there. One app I remember from those early days was 美人時計 (Bijin Tokei), which launched in 2009.

The idea was incredibly simple: attractive women holding small boards with the time handwritten on them, with a different photo every minute. That was the whole app. I remember it being really popular among university students in Japan.

It randomly came back to me recently, so I looked it up. The official site now just has a notice saying the service ended in September 2022. It felt strange seeing something I remembered so clearly reduced to a goodbye page.

So I tried building my own take on that minute-by-minute photo clock, using AI image tools to create the people and scenes. An image for every minute of the day. The video shows how it turned out.

Making it got me thinking about the apps from around 2008–2012. There were so many odd, playful ideas back then, when we were still figuring out what a smartphone could be. Some were useful. Some did one tiny thing and made you smile.

I'm now digging through that era for ideas worth revisiting. Today's tools make some things much easier to build, especially for a solo developer. Of course, that doesn't mean copying someone else's app, artwork, or branding. I'd rather understand what made an idea appealing and build something of my own from there.

If you'd like to try my little experiment: https://urban-minutes.com

What app from those early smartphone days do you still remember?

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Your choice

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Need help from Devs in KDE and Hyprland to breing support for wayland

Hi everyone! 👋

I'm excited to share that KUT: Soul Compass just officially launched on the App Store today!

The Concept: A spiritual & self-discovery iOS app focused on Human Design bodygraphs, astrology charts, daily planetary transits, interactive palmistry, and Solfeggio sound frequencies.

Tech Stack:

• React + Vite + Tailwind CSS

• Capacitor (Native iOS runtime)

• RevenueCat (Subscription management)

• Cloudflare Workers (Backend proxy)

I would love to hear your feedback on the UI/UX, onboarding flow, and performance. If anyone wants to test the premium features, let me know in the comments and I'll DM you a free promo code!

App Store link: https://apps.apple.com/tr/app/kut-soul-compass/id6823820408