Run your class speed to the hundredth.
Open Road Ace puts a virtual pace car on your dash for open-road races and TSD rallies. The rabbit runs your target speed. You hold the gap. You cross the finish on your time.
Watch 45 seconds0.009 s off target on a 3.1 mile two-leg test with RTK. Built and raced by a Big Bend Open Road Race driver.
What's new in iOS 2.3 and Android 1.4.3
September 2026
- A dark interface made to be read from a mount: one big number, a car chasing a rabbit, green for speed up, red for slow down.
- Two-leg events: pick any course for leg 2 and your carry-over follows you. If you back out and start another course within 30 minutes, the app asks whether it is leg 2.
- Distance to the start line before the start, so a flying start lands where it should.
- RTK corrections that verify the stream and reconnect on their own. The pre-arm screen shows whether corrections and a fix are ready before you arm.
- When GPS delivery stalls for a moment, the display holds at your last speed for three seconds instead of freezing the car.
Full release notes on the App Store and Google Play.
How it works
Pick a course and a target speed.
Built-in BBORR courses, your own recorded course, or a GPX file. Enter the class speed you have to average.
Arm and start.
Scheduled start synced to the GNSS clock the starting tree uses, or a flying start when you cross the line. A checklist confirms GPS, corrections, and course before you arm.
Hold the gap.
The rabbit runs the course at your target. The ribbon shows how far ahead or behind you are, in feet. Match it and you finish on your number.
See it on the road
From arm to finish, on your phone and on your head unit.
Also runs on Android head units, same pace ribbon, dash-ready.
ORA Test Course
Two-leg event at 45 mph target, 3.10 mi total. ArduSimple RTK kit + u-blox NTRIP corrections.
Built for the open road
Every feature exists because a racer needed it at 130 MPH.
Rabbit delta in feet
Your distance to the rabbit, updated live, with a chevron that tells you how hard to correct.
The pace ribbon
A car and a rabbit on one strip, with distance marks, readable at 100 mph from a mount or a head unit.
Flying or scheduled start
Scheduled starts lock to satellite time. Flying starts trigger when you cross the start line, with your distance to the line shown before you get there.
Finish scored to the hundredth
Gate-based finish detection, corrected for where your antenna sits on the car.
Two-leg events
Out-and-back events are scored on the combined delta. The app carries leg 1 into leg 2 and shows the event total at the finish.
Any road
Built-in BBORR courses. Record a course by driving it. Import GPX from Strava, Garmin, or a hand-built file.
Every receiver
Your phone, RaceBox, XGPS-160, and RTK rigs from ArduSimple, BYNAV, and UM980 with NTRIP corrections.
Run history and export
Every run is saved with its delta and speed. Export the telemetry log to compare runs or hand it to a co-driver.
Android head units
The same ribbon on your dash. Runs on Android head units as well as phones and tablets.
Every receiver, one app
| Receiver | Rate | Typical accuracy | Corrections | Notes |
|---|---|---|---|---|
| Phone GPS | 1 Hz | 3 to 5 m | none | Works anywhere. Fine for practice and for learning the app. |
| RaceBox Mini / Mini S / Micro | 25 Hz | 2 to 5 m | none | Bluetooth. The most common upgrade. |
| XGPS-160 | 10 Hz | WAAS | SBAS | Bluetooth. Works with older phones. |
| ArduSimple simpleRTK2B + BT bridge | 10 Hz | 2 to 50 cm with corrections | NTRIP | Under $500. The rig behind the 0.009 s test. |
| BYNAV | 10 Hz | RTK | NTRIP | Bluetooth RTK receiver, supported in the GPS picker. |
| UM980 (ORA box) | 10 Hz | RTK | NTRIP | USB or Bluetooth. The receiver in the ORA box. |
Rates and accuracy are the manufacturers' figures. Corrections need a data connection to your NTRIP caster; the race timing itself works without one.
Want a ready-made RTK rig for your car? Email [email protected].
Built for open-road racing and TSD rallies
Big Bend Open Road Race. Silver State Classic Challenge and the Nevada Open Road Challenge. Sandhills Open Road Challenge. Any time-speed-distance rally where you have to hold an average. If your event is not on the list, record the course and race it.
One price. No subscription.
iPhone and iPad: $29.99 on the App Store. Everything included.
Android: free to download. $29.99 one-time unlock to race.
No accounts, no servers, no ads. Your runs stay on your device.
Frequently asked questions
Is this a lap timer?
No. Open Road Ace is for point-to-point events scored on average speed. It is not for track days or autocross.
Which events does it work for?
BBORR, Silver State, the Nevada Open Road Challenge, Sandhills, and any TSD rally. Record your own course for anything else.
Do I need extra hardware?
No. Your phone's GPS works. A RaceBox gets you 25 Hz updates. An RTK receiver with corrections gets you centimeters.
How accurate is the finish?
With RTK corrections, single-digit milliseconds. With phone GPS, a few tenths of a second. The app corrects for where your antenna sits on the car.
Does it work without cell service?
Yes for the race. GPS does not need a connection. NTRIP corrections do, so RTK accuracy depends on coverage along the course.
What is the rabbit?
A virtual car that runs the course at your target speed from the moment the race starts. The number on screen is your distance to it, in feet.
How do two-leg events work?
Each leg is scored, and the event is the combined delta. The app carries leg 1 into leg 2 and shows the event total at the finish.
Can I run it on my head unit?
Yes. The Android version runs on Android head units and tablets with the same display.
Does it work on CarPlay?
Not yet. Apple has to grant a navigation entitlement first. Mount the phone or use an Android head unit for now.
Can I record my own course?
Yes. Drive it once with the recorder on, name it, and pick it on race day. GPX import works too.
Where does my data go?
Nowhere unless you send it. There are no servers and no analytics. Runs and logs stay on the device until you export them.
Is there a subscription?
No. One purchase on each platform.
Learn
Your event isn't built in? Open Courses, tap record, drive it once, name it, and pick it on race day. GPX import works the same way. The guides below cover that and the rest.
Recording a course
Walk through capturing the start, gates, and finish for a new course.
Reading the pacing display
What the rabbit, target speed, and delta numbers mean during a run.
Choosing your GPS receiver
ORA supports three GPS sources, pick the one that matches your event and budget.
Choosing a mode (Training / Event / Custom)
When to use each mode and what speed limits apply.
Fixing wrong-leg snap on a finish gate
How the polyline snap can choose the wrong leg on tight courses, and how to debug it.
CarPlay setup
CarPlay is not available yet. Apple has to grant a navigation entitlement first.