We highly recommend making a backup of your logbooks on each device before initiating a sync for the first time.
Please also keep in mind that when you use WiFi Sync between two devices and select the Replace option there is always one master device and one subservient device. The data from the master device will always replace the data from the subservient device. Conversely, if you choose the Merge option the data from both devices is merged into one.
Usually a Merge will automatically start, but if you get the Replace option please note the following
- When you sync and select the Replace option between an iPad and iPhone the iPad will always be the master device and the iPhone will always be the subservient device.
- When you sync and select the Replace option between an IOS device and a Mac computer the Mac is always the master device and the iOS device is always the subservient device.