It’s live. Trackday Pyrometer Helper is out on the Google Play Store — the one-screen-per-job Android app I’ve been building and dogfooding at every track weekend for months.
▶ Get it on Google Play
What it does
One app for three jobs I used to juggle on paper and three separate gadgets:
- Tire temps — OUT / MID / IN across all four corners from my custom PyroTC BLE pyrometer, turned into camber and pressure advice from the spread.
- Tire pressures — cold and hot PSI from cheap BLE TPMS sensors (Zeepin and DJTPMS), plus an all-day background monitor that logs pressure and temperature and auto-counts heat cycles.
- Corner balance — cross-weight from ProForm wireless scale pads streamed live over Bluetooth, with “move this much onto the diagonal” recommendations.
- Tire inventory with heat-cycle tracking, resettable packing checklists, CSV export, and full JSON backup. Everything is on-device — no accounts, no cloud.
Read the manual
Full setup and workflow, start to finish — Bluetooth, the color-coded TPMS system, temp sessions, the background monitor, and the scale-pad setup, all with screenshots:
→ Trackday Pyrometer Helper — User Manual
I want your feedback
If you run track days on Android, please try it and tell me what’s confusing, what breaks, or what’s missing. Bug reports and “this workflow is dumb” notes are exactly what I’m after — this thing got good by getting used and complained about.
UI and feature suggestions → matt@geekopolis.com.
Want to try the TPMS or scale integration? Free install codes
The two features people ask about most are the Bluetooth integrations:
- TPMS — reads cheap Zeepin / TPMSII and DJTPMS BLE sensors directly (pressure, temperature, battery), protocol auto-detected per sensor.
- ProForm wireless scales — streams the corner-weight pads live over BLE for cross-weight in real time.
If you want to try either one, I’ll send you a free Google Play code to install the app — no charge. Just reach out and tell me what you’re running.
Easiest ways to reach me: matt@geekopolis.com, or DM @mattryan6729 on Instagram.
If you give it a run this weekend, let me know how it goes. 🏁