Sep 29, 2026 · 28 min · 11 segments
Send us Fan Mail Hayden breaks down CarROI, a stock-tracker-style app for collector car values. He shares how AI helped him go from a rough…
Hayden GarrickGuestSeanHost
There are some different things and some auction websites that'll show you values and things.

And so in terms of a model, there wasn't really anything specifically set for me to say, oh, I want to make my own version of this app or that program or whatever it is.

And the first version was... relatively rough and i just started polishing and fixing and adapting it to what people were telling me they were interested in i talked to a couple of people who have cars are very interested in cars and showed it to people and initially it was just on my phone through through expo go and i would just hand it over to people and let them play with it and see if they could break it and Really just a process of fixing, implementing, retrying, and continuing that iterative cycle.
other apps that track unique assets? Maybe not cars, but they track, I don't know, maybe like Pokemon cards or other really unique assets that individuals have? Yeah,

And then did that I kind of was thinking the whole time, what would happen if Porsche had their hands on like a Bloomberg terminal? What would that look like? If you could access the Bloomberg terminal from the center screen of your Porsche, how would that look and feel? And that was kind of just the design cues that I started going.

Our friend Gage was telling us about an app that he uses to track Pokemon card values and things, but no specific models.

Like I said, for better or for worse, maybe it would have been easier if I would have had something to model off of.

But then again, I was able to choose everything and kind of figure stuff out on my own, which was great.
Which that brings us to a really unique point of looking at other examples is a great way to build an app because you can be like, hey, it's already been built this way and you can use it as a model.
You know that it works.
Do you feel like doing it the way that you put it together, it's kind of got more of your unique voice in it? Or do you feel like it's still really similar to other things in the market?

I would say in a way the goal was sort of to make it feel familiar when you opened it familiar to a stock app.

A lot of the people who have these, these types of vehicles are also investing money into the stock market using different brokerage apps.

that they could drag a chart, for example, or move something on the watch list by just long pressing it.

But in terms of unique voice, I definitely think some of what I find to be important, recent sales, you know, what exactly is affecting the value is built in and presented in a way that I thought was helpful and was what I would want to see if I was opening the app.

And I really am glad that I didn't pick out an app and just kind of one-to-one it, which I know you can really do easily now with ChatGPT.

There are some different things and some auction websites that'll show you values and things.

And so in terms of a model, there wasn't really anything specifically set for me to say, oh, I want to make my own version of this app or that program or whatever it is.

And the first version was... relatively rough and i just started polishing and fixing and adapting it to what people were telling me they were interested in i talked to a couple of people who have cars are very interested in cars and showed it to people and initially it was just on my phone through through expo go and i would just hand it over to people and let them play with it and see if they could break it and Really just a process of fixing, implementing, retrying, and continuing that iterative cycle.
other apps that track unique assets? Maybe not cars, but they track, I don't know, maybe like Pokemon cards or other really unique assets that individuals have? Yeah,

And then did that I kind of was thinking the whole time, what would happen if Porsche had their hands on like a Bloomberg terminal? What would that look like? If you could access the Bloomberg terminal from the center screen of your Porsche, how would that look and feel? And that was kind of just the design cues that I started going.

Our friend Gage was telling us about an app that he uses to track Pokemon card values and things, but no specific models.

Like I said, for better or for worse, maybe it would have been easier if I would have had something to model off of.

But then again, I was able to choose everything and kind of figure stuff out on my own, which was great.
Which that brings us to a really unique point of looking at other examples is a great way to build an app because you can be like, hey, it's already been built this way and you can use it as a model.
You know that it works.
Do you feel like doing it the way that you put it together, it's kind of got more of your unique voice in it? Or do you feel like it's still really similar to other things in the market?

I would say in a way the goal was sort of to make it feel familiar when you opened it familiar to a stock app.

A lot of the people who have these, these types of vehicles are also investing money into the stock market using different brokerage apps.

that they could drag a chart, for example, or move something on the watch list by just long pressing it.

But in terms of unique voice, I definitely think some of what I find to be important, recent sales, you know, what exactly is affecting the value is built in and presented in a way that I thought was helpful and was what I would want to see if I was opening the app.

And I really am glad that I didn't pick out an app and just kind of one-to-one it, which I know you can really do easily now with ChatGPT.
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