R-navi, from R-biesINC., is an iPhone app that links marathon runners with supporters and event staff during races. It visualizes runner progress using official race timing data to show predicted positions and estimated arrival times on interactive course maps, and lets supporters send real-time encouragement. Key tools include virtual cheering, post-race results, finisher certificates, location sharing, and RUNNET account integration. It suits marathon participants, family, friends, and organizers seeking coordinated race-day support.

How R-navi maps runner progress during an event

R-navi uses official race timing data to interpolate a runner's position between checkpoint detectors, presenting predicted locations and estimated arrival windows on a course map. The app is an official tracking partner for events such as the Tokyo Marathon, which means live timing feeds feed the map rather than raw GPS alone. For supporters this creates concrete arrival windows at cheering points instead of only split times.

How R-navi connects with RUNNET and race systems

The app integrates directly with RUNNET accounts to surface event history and enhanced event features, and it supports races that use the RUNNET 'Ouen navi' service. Because some capabilities depend on that integration, accessing full tracking and post-race records may require signing into a RUNNET-linked account. Tracking beyond four runners requires an account-gated tier rather than being available without registration.

Is R-navi straightforward for supporters on race day?

Supporters can send text encouragement, use a virtual drum, and share locations to coordinate meeting points, which simplifies in-person cheering logistics. R-navi runs on iPhone with iOS 14.0 or later and offers English support; however some users report inconsistent translations and occasional GPS lag during peak race times, which can introduce friction for non-Japanese speakers or in dense urban race fields.

How R-navi treats location data and fosters community thanks

To coordinate meetups the app requests location sharing, and it builds position estimates from official timing feeds rather than continuous server-side polling alone. The 'Thanks Map' lets runners and spectators send digital thank-you messages to volunteers and staff, creating a visible record of community appreciation. Enhanced historical data and post-race certificates appear when linked to a RUNNET account, which affects what is stored and shown.

To sum up, R-navi suits supporters who need clearer coordination on race day

R-navi is a practical option for spectators and family who want reduced uncertainty around arrival windows; its ties to the local RUNNET ecosystem make event data accessible during races. International users should check language settings and expect occasional GPS lag in crowded conditions. Pro tip: verify your language configuration and share your meeting point before the race; that small check reduces on-the-day confusion.