Hi!

My name is Marta, and I m working on a startup idea that I genuinely believe could become something big and I want you to give me harsh and frank rather than nice and polite feedback.

I'm a solo developer, and I've been building Cognilumin for the past few months mostly late nights and weekends. It's now live, completely free, and I'd love some honest feedback from the Product Hunt community.

Cognilumin is a stateless AI infrastructure platform with three tools:

Illuminator paste any complex topic and get a structured explanation with mental models, analogies, and a key takeaway.

Topology Visualizer describe a system scenario and watch a live particle flow field map the state in real time.

I ve always felt apps like Notes or Keep become messy once you start storing important personal information in them. Things like IDs, insurance details, account info, documents, emergency contacts, etc. end up scattered everywhere.

So over the last few months I started building a small iOS app for myself focused specifically on organizing sensitive information in a more structured way.

Hi Product Hunt! I m the maker of Sage

I built Sage after realizing something uncomfortable:

Most productivity tools worked
But they made me feel worse using them.

Timers felt aggressive.
Streaks felt punishing.
Missing a day felt like failure.

We just launched a side project called Waitlyzt on Product Hunt today.

We built it because every waitlist tool we tried only collected emails, but didn t help answer the real question:
what should we actually build first?

So we built a lightweight tool that combines:

I am building a modern AI-powered music streaming application designed to provide fast, lightweight, and seamless music playback with smart search and streaming features.

The project is currently in early development (MVP stage). Core backend and frontend architecture are being actively built, but additional resources are required to complete hosting, scaling, and production deployment.

What makes this app different:

• AI-assisted music search and recommendation

• Fast streaming architecture with caching system

• Lightweight and mobile-friendly UI

• Scalable backend designed for high traffic

Just launched WorkZo AI

I ve always felt interview prep tools were too scripted.

Real interviews are uncomfortable sometimes:

• recruiters interrupt you

• they challenge vague answers

• they lose trust when answers feel weak

• they ask follow-ups based on what you just said

Hi everyone,

I wanted to introduce a small project I originally developed just for myself, because it was hard to find a free app to manage an entire collection of Pok mon cards and sealed products most of them are paid: myPokeVault, a free web app for managing your Pok mon collection.

The idea is simple: a digital vault where you can track your cards, ETBs, boosters, boxes, tins, bundles, and more. You can add items with a photo, set, condition, language, purchase price, current estimated value, and follow how your collection evolves over time.

I tried to make it pleasant to use, especially on mobile, because I wanted to manage my collection easily from my phone. The app can also be installed on your phone s home screen, so it behaves almost like a regular app and is super simple to use.

I reviewed a few early-stage startup products recently and noticed the same pattern repeatedly:

users dropping during onboarding
weak conversion funnels
unclear feature priorities
operational friction slowing growth

Most early-stage startups don t fail because their technology is weak.

They struggle because product execution becomes inconsistent while trying to scale with limited resources.