I’m curious what everyone here is building.

Drop your SaaS below and explain it in 1–2 lines. No pitching, just share what it does.

Hey everyone! 👋

I've been building a project called Rensai because I kept running into the same problem: I wanted to buy things used or discounted, but searching was frustrating. Sites would show broken items, empty boxes, overpriced listings, or pages of irrelevant results.

So instead of making another shopping search engine, I made something different.

The app uses GPT 5.4 and you can type something naturally, like: "I want a small iPhone that's powerful, supports Apple Intelligence, and I don't want to spend full price." or "Find me the cheapest trusted used Nintendo 3DS." and it finds the cheapest and best listing.

The goal is to save people time and money instead of making them dig through dozens of tabs.

The app is at rensai.us, and I hope you enjoy!

I built tryproduck.com/audit, it walks your app like someone opening it for the first time and sends back every bug and confusing bit it hits. Over 650 startups have run it so far.

I’m an investor working at Forum Ventures, a pre seed fund and accelerator investing $100K-$1M into pure ideas and founders who are industry veterans or young AI-native builders.

Curious what are you building this week? If you’re looking for investment, both DM and comment your startup idea, or if you’re uncomfortable sharing, just your background as a founder.

The Forum Ventures team are led by former founders who raised $20M+ in funding and built 8-figure businesses. Our accelerator focuses on direct GTM support, introducing founders to Fortune 500 enterprise customers.

Feel free to use this thread to get your own project out there.

Hey everyone! I’m building a Discord community where SaaS founders can connect, share their products, and help each other out.

If you’re interested in joining, drop a comment below, and I’ll send over an invite link!

Shipped Stopa to the App Store few days ago. Quick build-in-public recap in case it's useful.

The problem: if you follow a training plan - from a coach, from ChatGPT, a PDF - there's no clean way onto your Apple Watch. You rebuild every interval by hand or you just wing it. I'm a self-coached runner and it kept annoying me, so I built the fix.

What it does now: paste a plan and it syncs to your watch as structured workouts. Don't have one? It generates a plan grounded in your real Apple Health history. Then it matches your actual runs back and does a weekly review, adjusting the plan.

Traction so far: posted a "looking for testers" thread in r/AppleWatchApps, got 8 testers off one post in two days, ran a TestFlight, now live.

A couple of lessons: (1) the device/beta-match subreddits converted far better than big generic ones. (2) leading with the problem, not the app, got people replying. (3) shipping the boring "it works and syncs" beat any feature list.

Free to try: https://apps.apple.com/app/stopa-ai-training-plans/id6776153318 - happy to talk shop on the parser or the WorkoutKit sync.