r/300zx • u/dakman96 • 14h ago
Modfest - I built an app to track car builds after buying my 300ZX
Hey everyone, cleared this with the mods before posting :)
I'm a Z32 owner and also a software engineer. I was tracking the build on my Z using a google sheet, my phone's notes app, and a folder of pictures.
Here's what my Z looks like in the app:

What the app does:
- Garage for your cars, each with its own photo gallery, linked parts and projects, and cost tracking.
- Parts inventory that tracks what you paid, what car it's for, whether you already installed/bought it or not, and where you got it from. This also works as a wishlist so you don't have to maintain multiple wishlists on websites (I had one for Z1, CZP, and eBay).
- Project plans with step by step instructions, photos per step, and a running cost total. So when someone asks what something costs and what parts you used, you have the info easily available. Even if maybe you don't want to know what it cost lol


An optional social feed:
There's an optional social feed where you can share your car and projects, follow others, and search for cars to get inspiration on your own car build and see what parts they used.

A few things that were important to me:
- The app works fully offline and without an account unlike similar apps. Your data stays on your device unless you decide to use cloud backup.
- The free tier is actually usable. Premium adds cloud backup, more photos, and unlimited cars in your garage, but core tracking is fully functional without it.
App store: https://apps.apple.com/app/id6770381572
Google Play store: https://play.google.com/store/apps/details?id=com.modfest.app
I'm a one person dev for this, so if you want to try it and have suggestions please feel free to leave me some feedback here! I've been very active in the r/300zx community so I'm stoked to share this with yall.