Is it Duo-ready?

RaceChrono Pro

RaceChrono Oy

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Does RaceChrono Pro work on iPhone Duo?

Probably. The release notes for RaceChrono Pro 10.3.1 (October 29, 2026) mention iPhone Duo. No owner has reported how it runs yet.

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By position

Outer screenNo data
Inner screenNo data
Half-folded (tabletop)No data
Keeps your place when foldingNo data

From recent reports. “Didn't try” answers aren't counted.

App Store updates

All apps
Version 10.3.2

Released after Duo submissions opened

Version 10.3.1

Mentions iPhone Duo: “Added iPhone Duo support”

Checked every few hours. Only builds made with the iOS 27.1 SDK, accepted since October 5, 2026, can use the whole inner display. Owner reports confirm whether an update did.

Report how it runs

How does RaceChrono Pro run on your Duo?

Screenshots

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Positions you tried

Outer screen
Inner screen
Half-folded (tabletop)
Keeps your place when folding

Optional. It helps people who use the phone a certain way.

Details

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Reports (0)

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Badge for developers

iPhone Duo status of RaceChrono Pro
Markdown
[![iPhone Duo status](https://isitduoready.com/app/racechrono-pro/badge.svg)](https://isitduoready.com/app/racechrono-pro)
HTML
<a href="https://isitduoready.com/app/racechrono-pro"><img src="https://isitduoready.com/app/racechrono-pro/badge.svg" alt="iPhone Duo status of RaceChrono Pro" height="20"></a>

Shows RaceChrono Pro's current status and updates by itself. Add it to your README, website or press kit.