iPhone Screenshots
Description
Tennis Blackbox records tennis match at highest available speed up to 240 fps.
When players disagree on the last call, they can stop video recording for the review.
Last 20~40 sec FHD(1920 x 1080) video at the ultra-slow motion is stored for review.
With Tennis Blackbox, players do not need to shout on the call. Just see the video for correcting the call and focus on the play.