> Am quite certain no app can monitor your location in the background on iOS. Any application can do this on iOS, with a few caveats: - iOS prompts you to gra

> Am quite certain no app can monitor your location in the background on iOS. Any application can do this on iOS, with a few caveats: - iOS prompts you to grant permission when the application requests it for the first time. If you refuse, the application cannot keep prompting you. - After a few days, it reminds you that the application has been accessing your location in the background and asks you if you want to keep allowing it or revoke access. - There is an indicator in the status bar to let you know when an application is tracking your location. - You can see which applications have access and which applications have used that access recently by going to Settings > Privacy > Location Services. - You can revoke access at any time in the same place or by going to Settings > App Name. - You can also only grant applications access to your location while you are using the application, as long as the application supports that. - If an application doesn't intrinsically need location services to function and the developer tries to force users to grant permission by disabling functionality, the application is unlikely to be allowed in the App Store. As others have mentioned, there are also other ways in which applications may be able to infer your location indirectly.