GTM Sauce

Pep AI · B2C · peptide tracking app

Build an app for a topic blowing up on TikTok with no winning app yet

$51K revenue in ~7 weeks; organic App Store search traffic from the trend

Workedmarket-selectionpositioning-niche

What they did

After a roommate mentioned peptides and a peptide TikTok hit his For You page a week later, Cedric saw peptides were huge on social media and that the few existing peptide apps (some a couple of years old) hadn't succeeded. His process: scroll TikTok/Instagram daily to spot what many creators are obsessed with, then check whether apps exist; a couple of unsuccessful apps is a good sign (demand proven, nobody has marketed it well). He chose a narrow audience after his broad first app failed to monetize.

What happened

$51K total revenue within ~7 weeks of launch; users find the app through App Store search for the trend
Stage
idea

In their words

I Built A $30K/Month in 35 Days

Play from 5:57

Pat Walls… That's not that hard, didn't take that long. I think one of the most important things for a lot of people watching this channel is how to find the right idea, and I think that your app is the perfect example of finding a great niche, a great idea, a growing trend. So let's talk about that. How did you actually find this idea? How did you validate and how did you know and have confidence that this is something that can make $50,000 in 7 weeks?

5:57

Cedric RobergeHow it started is one of my roommates came up to me and was like, "We should take peptides." And I had no idea what he was talking about. Like a week later, I get a TikTok on my For You page about peptides, and so, you know, started looking them up and found that they're huge on social media. There wasn't an actual peptide app out there to like really explain what all these peptides do and how to use them safely. And there were a couple that have been out for a couple years, but none of them were successfully yet. That's when I realized that there was like an opening there. So then I went through every single existing app, looked through all the reviews of the things like: What do people like? What do they not like? What do they wish they had? And then from there, I just built the best version and had Claude do a bunch of searches so that we could build something that would be actually useful for people when they want to take peptides or just learn about them.

6:38

Pat WallsI think there's a couple interesting points you had there, which is like there was like a couple of signals, which is your friend told you about it, then you saw it in TikTok, and then you had genuine interest in it as well. Those are like three things that I think are really important. If anyone's watching this, what would be your advice to them on like how to identify like an idea like this? Tell me a little bit more about that.

8:08

Pat WallsBuilding on a growing trend, let's dive a little bit deeper into that. If you were to start over right now, peptides have already reached the top of their trend curve and you have to find a new idea, what would be your step-by-step, if you're starting over in middle of 2026, finding a new trend and building an app? What would be your process?

8:26

Cedric RobergeI would probably just live on social media. Every free second I have, I would just go on there, scroll TikTok, scroll Instagram, and just find what everyone's talking about. This is what a lot of successful people have done, is finding things that are just blowing up. But I would literally just Step one is watch TikTok every single day and find out what people are just genuinely obsessed over. If multiple people are posting about it, it's probably going to be something that you can turn into a tool that people would use. Step two is to investigate whether these apps already exist in the space. And if they do, I think it's actually a good thing because it kind of validates that this is something that people want. If there is zero apps, it's still 100% can be popular and done well. But I think if there are a couple apps, that's a good sign because they've people have built it, people want it. Just no one's really marketed it like successfully yet. Next step is what I would do is look for these other apps and come up with ideas off of it. I would literally go through every single …

9:32

Pat WallsThis is genius. I actually just talked to a founder who completely rebranded their entire app based on past, they took all their reviews, they took all their cancellation reasons in Stripe, they took all their support requests, they pumped it into Claude, and they completely rebranded their app, and then after the rebrand, they grew like 350% or something like that. So go on and look at the existing, even if you have competitors, go take their …

Get tactics like this every Monday

New tactics from the week's founder interviews, each linked to where it was said.

More from this episode

Tags: tiktok, instagram, trend-riding, idea-sourcing