As the app is able to work offline and track usage from your phone logs, it will track the usage of both SIMs, regardless of which SIM is primary. GoRoam does not distinguish usage on either SIM and as such, may provide inaccurate roaming expense estimates.
Likewise, if the secondary SIM is non-Globe, rates for roaming calls, texts and data will be incompatible with GoRoam and, therefore, provide inaccurate roaming expense estimates. GoRoam is designed to work best with single-SIM smart devices on Globe. Note also that only one (1) mobile number can be enrolled in the app.