LapSnap imports sessions you recorded in RaceChrono Pro. Export the session as a CSV v3 file, open it in LapSnap, and you get lap times, a track map and lap comparisons for that session.
LapSnap brings across GPS position and lap times. It needs an internet connection to process the session; after that the session is cached on your phone and works offline. RaceChrono import is in beta, so if a file does not import, email it to support@lapsnap.app.
RaceChrono records sessions on your phone or from an external GPS receiver. LapSnap focuses on analysis, so you can keep recording in RaceChrono and review the sessions in LapSnap.
You do not need RaceChrono to record without a lap timer. Since version 2.6.0 LapSnap records sessions with just your phone, and it downloads directly from AiM, RaceBox and GoPro devices.
CSV v3 with the scope set to Whole session, exported from RaceChrono Pro.
GPS position and lap times.
No. Since version 2.6.0 LapSnap records sessions with just your phone. The RaceChrono import is for sessions you have already recorded in RaceChrono.