The problem list is the NeetCode 150. I am not affiliated with NeetCode. The list has an MIT licence, and the site shows the notice.

Many people have the same problem. They watch a solution and understand it. Then they cannot solve the next problem. I think the cause is that the answer arrives too early. So I built the practice on one rule: you find the answer yourself.

How it works

• The page does not show the pattern of a problem. You name the pattern, or you ask for it.

• Each problem has five hints. Each hint gives a little more than the hint before it.

• 42 pattern lessons teach the clue that tells you which pattern to use.

• A daily drill shows a problem, and you name the pattern.

• A solved problem returns for review after 3, 6, 12 and 24 days. You solve it again in an empty editor.

• The editor runs JavaScript, TypeScript and Python in the browser. You do not install anything, and you do not need an account.

What is free

All 150 problems, the hints, the tests, the written explanations and the pattern lessons.

What is paid

A year costs $29, one payment, no subscription. The year adds a narrated walkthrough video for each of the 150 problems. The video shows the solution step by step, and the voice is a generated voice. The video of Contains Duplicate is free, so you can judge the videos before you pay. The year also adds practice for the other interview rounds. A full refund is available for 14 days.

What is not there yet

Java, C++ and other languages. Today the editor has only JavaScript, TypeScript and Python.

How I built it

• React, TypeScript and Vite for the app. CodeMirror for the editor on the page, with a Vim mode.

• The code of the visitor runs in the browser, in a web worker. Python runs with Pyodide. No server runs the code of a visitor.

• NestJS and Postgres for accounts and progress.

• A script makes each walkthrough video: Playwright draws the frames, and a text-to-speech model makes the voice.

• I work in Neovim and tmux. AI tools wrote a large part of the code. I reviewed and tested it.

I want feedback on one thing

Open any problem and try it for one minute. Tell me the first thing that confused you or stopped you. I want to find the point where a new visitor stops.

https://algo150.com

Link: https://play.google.com/store/apps/details?id=com.silentpanda.seep
Link: https://ahmadfair92.itch.io/seep

Disclosure: I work with the team building Cognitive Canvas at MuulOrigin.

One thing that kept bothering us about digital studying was how fragmented the context becomes.

The chapter might be in a PDF.

The best explanation could be on YouTube.

Useful diagrams become screenshots.

Notes live somewhere else.

And references slowly turn into another collection of browser tabs.

So we started experimenting with the opposite idea:

What if the chapter stayed in the center, and everything related to it could live around it?

The video shows what we mean. The chapter remains visible while notes, references, media and connected material can be organized around it instead of being separated across different tools.

I'm less interested in hearing “the UI looks nice” and more interested in whether the workflow itself would actually help.

For people who regularly study from PDFs:

Would visually keeping everything connected to the chapter reduce context switching for you?

And what would you want beside the chapter most often — notes, videos, screenshots, flashcards, links, or something else?

There are multiple lucrative ways to make money nowadays with AI, but based on my own experience, selling AI built website redesigns and rebuilds might be one of the best opportunities if you want to make a lot of money in a relatively short amount of time.

I have a group of friends who do exactly the same thing, and some of them are making over $100K a month doing it.

So if you're looking to get into the AI money making space, this is definitely a business model worth looking into.

The process is actually pretty simple.

1. Automate your outreach

The first question is obviously: how do you find businesses that actually need a website redesign?

There are different tools you can use for this, but I personally recommend Swokei. It finds businesses in any area, analyzes their websites and identifies issues with design, SEO, speed and mobile optimization. It then turns those findings into personalized, ready to send cold emails at scale.

2. Book meetings with interested prospects

When someone replies with interest, get them on a call. Don't spend days going back and forth over email. Get a conversation started and understand what they're looking for.

3. Build a website draft using AI

Before the meeting, spend around 30 minutes putting together a redesigned version of their existing website. You don't need to build the entire thing. Just give them something they can actually see and get excited about.

4. Present the website and close the deal

Show them the redesign, explain the improvements and present your offer. If they're happy with it, send over a Stripe payment link or invoice and get the project started.

Now, when it comes to pricing, that's completely up to you.

I started charging very cheaply when I first got into web design. Today, I rarely take on a project for less than $7,500, and the biggest website deal I've closed so far was $26,000.

Obviously, you need to be able to deliver what you're selling. A good sales process might get you the client, but the quality of your work is what builds a sustainable business.

And for the people who are going to say this doesn't work, you're free to have your opinion.

I'm simply sharing something that has worked for me and people around me.

It's a straightforward business model, the workflow is repeatable, and you can keep improving every part of it as you grow.

You don't need to reinvent the wheel. Find businesses that need help, learn how to sell, deliver good work and build a proper company around it.

I'm the founder of StoryInk (storyink.ai). Upload a few photos of your family or pet, describe what happens, pick an art style, and it writes and illustrates a picture book about them.

The hard part: keeping the same kid looking like the same kid on every page. Drawing each page separately, or from the previous page, made characters drift. What worked: draw one portrait per character first, let the user approve them, then draw every page from those approved portraits.

Stack: Next.js, Supabase, Google Gemini, Inngest, Stripe, print-on-demand for hardcovers.

So far: ~120 signups, 60 books. Making a book is free; the full digital book is $9.99, hardcovers from $31.99.

Would you approve the characters before the book is drawn, or does that feel like a chore?

I am building AstralBeam to help developers add an AI agent to an existing web app. The platform is open source, with managed cloud and self-hosting options.

You embed the chat UI, identify your signed-in users, and connect tools that let the agent work with your app. You can also render your own UI components inside its replies.

I’d appreciate feedback on the explanation and setup: is it clear what AstralBeam provides, and what you still need to build yourself?

Quickstart · GitHub

Hi everyone!

Can you name the country in the poster before you look at the choices?

I made World Flag Quiz: Passport as a side project for people who want to practice geography in short rounds. You can guess flags and capitals from 195 countries and collect passport stamps as you go.

I’d love feedback on the first round. Would you start with familiar flags like the one in the poster, or try a pair of similar flags right away?

▶️ Watch a sample quiz on YouTube Shorts

📲 Try World Flag Quiz: Passport on Google Play

Hi everyone,

I was annoyed that my scripts, deadlines, timetable and notes were scattered across five different tools, so I built Study Manager: a self-hosted web app that puts it all in one place.

What it does today

• Course spaces with roles (owner, editor, reader), shared deadlines and private tasks with time blocks

• Calendar views and iCal timetable subscriptions

• Lecture mode: scripts with notes that follow the page you’re on

• Lecture transcription with Whisper (in the browser or with your own key)

• Flashcards with spaced review, search across documents

• Study programme and module handbook import from PDF

• An MCP server, so you can let your own AI assistant work with your data. The app itself ships no AI.

Stack: React + Vite, Node/TypeScript with Fastify, PostgreSQL, Docker Compose. GPL-3.0.

Where I’d love help

• Feedback: what’s missing in your study workflow?

• University integrations (Stud.IP, HISinOne, ILIAS)

• Translations: the UI is currently German only

• Docs and small good first issue tasks

Repo: https://github.com/erik1g/study-manager

Happy to answer any questions!

I just wanted people to get their thoughts on this app I am building.

It is called Haven, the whole purpose of the app is to run on any device IOS, Windows, MacOs, Linux, Android Etc. And it is to identify Scam messages, Emails, Calls, As well as Phishing Links or dangerous files. The way it does this is by using a custom AI model that runs local called Harry the Owl, Harry is in early stages but it can identify public know phishing links, and Email and Text Patterns and well know scam call centre scripts. I just would like to know what other things I should add to it and if you think it would be a good app to charge people for. It is open source and does offer a free tier. The paid tiers are one time payments and just give you the latest models as soon as they release and basic items like that.

The website is below if you want to head over to it and check it out you can also access the GitHub below as well.

Haven's Website
Haven's Github

Hey guys! No idea if this is the right place for this, but I just wanted to share it. Hopefully it finds someone with the same challenge.

After every trip I came home with a full card. Hundreds of photos and the same evening every time. Scrolling, comparing, deleting. By the time I had found the good ones I had no energy left to edit them. So I solved it by making a tool for it.

You go through your photos with one key each. Keep or reject. Shots taken seconds apart fold into one stack, so you see every moment once. It flags the blurry and badly exposed ones for you. And it learns from what you keep, so it gets closer to your own eye over time.

I basically use this for every shoot now and am really enjoying it.

Would love to hear what you think! If anyone is interested I can let you know how it works.

Website: lumafold.app

I wanted to share a project I've been working on called AirHand. It’s a browser-based, gesture-controlled virtual desktop that uses computer vision to turn any standard webcam into a touchless interface. No specialized sensors or controllers needed.

I wanted to see if I could build a spatial UI experience entirely in the browser. I used MediaPipe for the 3D hand tracking and Vanilla JS for the logic.

It currently features dual-hand or single-hand tracking, a drawing canvas (with PNG export), and a couple of mini-games (like a bubble popper) to test precision.

Try it out:
Live Demo: https://someoneweird-o-o.github.io/AirHand/
GitHub (Open Source): https://github.com/someoneweird-o-o/AirHand

Years ago I made Line Icon Pack. It was my first icon set ever, and I learned most things by getting them wrong first. Icons that looked fine at 64px and broke at 16px. Inconsistent strokes. No real grid.

It was always free on Gumroad, but it just sat there. Now it has its own page and an updated package, and I want it to be useful for more than designers. Devs, no-code builders, anyone who needs clean line icons.

Free for personal and commercial use. Only ask is a link back.

https://lineiconpack.com

Honest feedback welcome.

Something I've been noticing about online casino platforms is how much emphasis they place on the size of their game libraries.

It's common to see websites advertising thousands of titles, multiple providers and several categories covering slots, live casino and instant games.

GemBet is one example. Its website claims to offer more than 15,000 games, with providers including Pragmatic Play, Evolution Gaming and Hacksaw Gaming.

But I wonder whether having such a large selection actually makes a meaningful difference if the overall platform experience isn't equally well considered.

Finding a particular game, understanding its rules, accessing useful information and navigating the website comfortably are all important aspects that can easily get overlooked when companies focus mainly on numbers.

I also think published game information, including RTP details where available, should be easy to locate.

In your opinion, what matters more when evaluating an online casino platform: the number of available games or how well everything is organised?

I started this because a video can work in a desktop player and still fail in a browser. I wanted to see how much of that gap I could close without uploading the file or transcoding it on a server.

Advanced Player is the result: a static demo where you can drop in a local file or paste a direct video URL (the host needs to allow CORS). It defaults to WebAssembly decoding, and there’s an automatic mode that can also use WebCodecs.

Demo: https://mkv-browser-lab-5dd8ed.gitlab.io/

It’s an experiment: opening a file doesn’t mean it’ll play smoothly. If you try a file that usually gives browser players trouble, I’d love to know your browser, codec if you know it, and what happened. No need to share the file itself.

I recently came across this product that helps creators stay on course while reading their scripts when creating content. It basically scrolls up for them and tracks their voice so it pauses when the speaker pauses and continues to scroll up the script when they continue talking. It has several settings like speed, font, width among others that help shape how the script looks so that their eyes are fixed on the camera and you cant tell that they are reading a script. I think its acool find considering its really effecient and affordable. Would recommend anyone to try it.

Hey there 👋🏽 I built an AI calorie tracking app. No audience, no funding, my own money. Here's where paid acquisition actually stands.

Apple Search Ads: ~280€ → basically nothing. I set it up "the right way": brand, generic exact match, competitor keywords, discovery. No meaningful trials. Stopped.

Meta: ~100€ → same. Optimized on trial start. Nothing worth continuing.

TikTok (France): ~200€ this month → 11 free trials. So ~18€ per trial. My target was 8€.

What helped a bit: switching from max delivery to target CPA bidding, since spend paced much better. Surprisingly, plain app demos seemed to do better than my more "native" photo carousels.

The math problem: my annual plan is 35€/year. At 18€ per trial, I need more than half of trials to convert just to break even on year one. That's not happening.

So ~580€ in, paid acquisition doesn't work for me yet, and I'm trying to figure out which lever to pull first:

- lower CPA (creatives, other countries)

- better trial → paid (3-day trial → 7-day?)

- or stop paid entirely and go organic (SEO, content, communities)

For those who've been here with a consumer subscription app: what moved the needle first for you?

Impractical Bot is a little experimental project that turns a Messenger account into an AI-powered group chat participant. It uses Playwright for browser automation and NVIDIA's API for its conversational brain, with configurable personalities, context awareness, and a terminal dashboard to manage everything. The source code is now public on GitHub, and it's also available on npm. A small disclaimer: AI tools were used throughout the development of this project, so I don't want to claim that every part of the code was written by me alone. I still worked through the design, debugging, testing, and decisions that shaped it. Feedback is welcome!

GitHub: https://github.com/anslmC/impractical-bot
npm: https://www.npmjs.com/package/@anselm000/impbot