This app is a planning aid. The navlog, M&B, performance and briefing it produces may not be 100 % accurate.
This is the old version of Navlog. The new app is at mynavlog.app. Plans saved there don't appear here: open a navlog PDF via Plans → "Open navlog PDF…" to bring one across.
Check every figure against the school SOPs, the AFM/POH, the official charts (AIP VAC) and the current weather and NOTAMs before you fly. You remain responsible for your flight planning.