I don’t know what to believe any more 何を信じるかもう知らない😭 When i’m cycling i already have a speedometer but i wanted to test the app so i tried it on my bike and it was the same speed (number) as the speedometer on my bike, but on a car it was 10~15 km/h off but on a plane all it showed was 0😭 自転車を乗る時、もう自転車に速度計があって、このアプリをお試しでやってみたら、速度計と同じ数字(速度)だったけど、車で試してみたら、10~15km/hぐらいの間で違ったけど、飛行機でやってみたら0しか見えなかった😭