Lenny's Newsletter · Product & Work
TIER 4 2025-07-08
Everyone’s talking about vibe coding, and how important it is to get your hands dirty by using the latest AI tools. But what are people building? And are these products useful, like for real? The answer is a resounding yes.
I asked on X, LinkedIn, and my subscriber Slack community: What’s a product or tool you vibe coded that you actually use regularly in your work or life? And what tool/platform did you use to build it?
The response was overwhelming: Within 24 hours, I got over 1,000 enthusiastic replies, ranging from a buzzer app that automatically answers apartment deliveries, to a hyper-personalized greeting card generator, to a workplace accomplishments tracker, to a daily newsletter to help you learn a new language, to the perfect playlist curator for your next festival road trip. Your stories opened up my mind to what’s possible, and even inspired me to vibe code a few new tools for myself, including this sweet YouTube thumbnail preview tool, a tool to help me craft tweets for my podcast clips, and the beginnings of a tracker of the most mentioned books by podcast guests (data isn’t real yet).
To nudge you forward on your own vibe-coding journey, I’ve pulled together over 50 of my favorite examples from everything you shared.
As you’re reading through this list and wondering what to do, try opening up one of the AI tools (or a few at a time) and simply describe what you want in plain English, as if you were talking to a remote engineer. Then, iterate by describing what you want to change about what you see, as if you’re speaking with a remote engineer. You’ll be surprised by how far you’ll get.
Thank you to all 1,000+ of you who shared your stories 🙏

“I built CarbScanto help manage my son’s diabetes and blood glucose levels with faster carb counting. I used Replit. Has become a daily go-to.” [Check it out]

“Every time I put on new eyelashes, I take a picture and record the styles and method used.” [Check it out]

“I vibe coded this with Lovable and use it myself every single day. It’s grown to 85K users in total in nine months. Weather apps had too much clutter for simple daily clothing decisions.” [Check it out]

“I built a stupidly specific workout app for myself. It’s pretty gross and not for anyone else, but I love it. I was chatting with Claude about switching up my program, and I was about to ask it to format it into a table when I realized, ‘Wait, I’m in Claude and it can make Artifacts.’ Finally I ended up dumping the code into v0 to get it deployed.”

“I built a web app using Lovable, Supabase, and Cursor where you can upload photos of your fridge/pantry/receipts (or use voice) to detect ingredients you have at home, save to ‘inventory,’ and generate recipes using AI.
It factors in the user’s set dietary preferences and input of how strict/flexible recipes should be with using what you have in inventory vs. things you need to buy. It also auto-generates a shopping list for ingredients you need to buy for selected recipes.” [Check it out]

“Flowbound is an app that gives me games/exercises to do when I find myself procrastinating on something (which is often).” [Check it out]

“I (and users from all across the U.S.) use Paddles.ai to track and analyze my pickleball matches. Vibe coded and deployed on Replit.” [Check it out]

“I have no coding background and vibe coded this as my first app with Cursor/Xcode + SwiftUI. It helps you taper off high nicotine usage. It’s sticky until you’re ready to quit. Took a month to launch. Recently redesigned from scratch in a couple days.” [Check it out]

“I built Storypot entirely on Replit for my kid. Other kids and parents also seem to like it. We and 60-odd families use it frequently.” [Check it out]

“I built a simple app using Claude Code to help my kids figure out expense planning and saving when in college. Great value add considering it’s a tough topic for parents to make teenagers focus/lean toward.” [Check it out]

“I built Timeless Memories with Lovable, which is pretty insane to think such a complex app can be built with that. And all my friends have used it already.
I also built a logo animator with Bolt that uses the GSAP library to animate our logo in cool ways, for different onboarding experiences.” [Check it out]

“I’m a new dad, and while waiting for the little one to arrive, I started tinkering around with Lovable. I built My Baby Logger over two weekends. Tracks feedings, sleep, diapers, and meds. It’s been helpful for us.” [Check it out]

“I built a chores app for my kids. It’s my first iOS app! I started with v0 but quickly moved off it and started using Claude to help me through areas where I got stuck.” [Check it out]

“I built this for parents, and now I use it every night. It’s a bedtime storytelling ritual that turns your daily emotions into personalized stories for your child. You reflect, drop a ‘pebble’ or plant a ‘story seed,’ and the app creates a calming, age-appropriate story shaped by what’s on your heart. I built it solo in Bolt + Supabase, and what started as a side project became my nightly parenting ritual.” [Check it out]

“I vibe coded an AI greeting card generator, and send everyone I know these hyper-personalised cards.” [Check it out]

“It checks my calendar each morning, identifies who I’m meeting with, and compiles everything I need to show up prepared.” [Here’s how to build it]

“I use this daily at work.” [Check it out]

“A Chrome extension that adds my availability to emails in natural, human-style language. It also analyzes suggested times from others, picks the best one, and books the meeting. İt learns my meeting habits to recommend the most suitable slots.
Then, a Slack app for team scheduling that uses the same core algorithm. It learns everyone’s preferences and finds the best time when I type something like Schedule a 45-minute call with Mary and Jane this week. Or Schedule a focus time for me today. I need 2 hours. Both were built with Replit.”

“I built a time tracking app with Warp.dev. All done in a day.” [Check it out]

“I built a Gmail add-on that doesn’t let my inbox hijack my day or steal my attention. I use it every day. It holds my inbound email and delivers it to my inbox on a schedule I set (e.g. 10 a.m. and 3 p.m.) but still lets important emails through right away if they match certain VIP keywords (e.g. verification code), VIP domains (e.g. my-kid’s-school.org), or VIP email addresses (e.g. wife@gmail.com). Built with Gemini.”

“Built this for myself because I hate updating my resume, and I think other people hate it too. Built it with Lovable and I use it weekly to track what I’ve accomplished.” [Check it out]

“I built Buzzerbee using Bolt and Cursor. It automatically answers your apartment buzzer calls based on the access rules and schedules you set in the app. I’ve been using it daily, and others have been joining as well. Turns out people don’t like missing deliveries!” [Check it out]

“My one-screen, tip-first bill splitter. Whenever friends float dinner plans, I plug in the menu subtotal, head count, pick the state, and nudge the tip slider. In two seconds, I see each person’s final after-tax share—something Splitwise can’t show until the check arrives. It’s become my quick ‘Can I afford this outing?’ filter and saves the awkward math at the table. And I built it using Lovable dev + Unicorn Studio.” [Check it out]

“I used Replit to bring to life something I’ve always wanted to build: a restaurant recommendation site for my friends to give them a curated restaurant recommendation based on what they are looking for in a specific meal/experience. It’s a combo of a database, RAG, and natural language chat with an LLM. Right now, it’s only Denver-based, but aiming to fill that gap between Yelp (too much junk/can’t trust the recommendation) and trying to find a new place.” [Check it out]

“This lets you paste in the transcript from a call and gives you a breakdown of what you did well and what you can improve on. I just used Claude Code. It’s surprisingly powerful.” [Check it out]

“I created a daily newsletter (with an audience of 1) that emails me every day at lunchtime:
- A story in the language I’m learning, geared toward my beginner level. The story is about something that happened on that day in history, generated by Gemini.
- A list of vocabulary from that day’s story
- A short grammar lesson from that day’s story
I tried Replit, Bolt, Gemini, and v0, and v0 came out with the best newsletter design. Then I had v0 also create the script for running the email (via Resend) and a script for packaging the code to upload to Lambda.”

“I built an app that lets you talk to an AI about your day-to-day problems. Used Replit.” [Check it out]

“I made a website to help with artist discovery for UK festivals. I use it to quickly generate playlists. I wouldn’t say it’s widely used beyond a handful of people. But it’s quite decent. I used Cursor and backed by Supabase for Spotify authentication. Currently all running on free tier infrastructure.” [Check it out]

“I made this music production tool the first week we got the Lenny AI bundle, with 90% v0 and 10% Cursor. I think it took three days from idea to shipping. I use it weekly just to get inspired for new musical ideas. Hotjar shows a handful of users per week, too!” [Check it out]

“I love RPG games and was looking for an online, AI-based RPG game so I can play without friends around. I then vibe coded Rehearsal—a browser game where you have 10 minutes to convince an AI character. For example, to convince a hostage taker to release hostages, or convince a broke flatmate to pay his share of rent. I used Cursor (Sonnet 3.7) + Next.js. I built a first version in a day. Since then, both my g.f. and I are addicted to it and play daily.” [Check it out]

“Immigrants from India and China have a 10- to 20-year journey where you have to file something every couple of years. VisaMonkey keeps all your immigration-related documents in one place so you can find the information you are looking for quickly instead of searching through mountains of documents. It’s also useful to fill out forms.” [Check it out]

Have a fulfilling and productive week 🙏
So many people shared so many great examples, I couldn’t help but include more of them. Skim this whenever you’re looking for inspiration:
Have you vibe coded something that you use regularly? Share a link (and what you used to build it) in the comments to inspire others on their journey. 👇
If you’re finding this newsletter valuable, share it with a friend, and consider subscribing if you haven’t already. There are group discounts, gift options, and referral bonuses available.
Sincerely,
Lenny 👋