What are some alternatives?
When comparing Quester and TheOneSpy, you can also consider the following products
FlexiSPY - FlexiSPY is the original "phone spy" software - it's been on the market since 2005.
mSpy - Cell Phone Tracking and Mobile Monitoring App.
XNSPY - XNSPY is the world’s most trusted cell phone spy software to monitor any smartphone and tablet remotely. It works on a range of devices including Android phones, Android tablets, iPhones and iPads.
Bosspy - Download for free our software to remotely monitor on text messages and SMS, calls, GPS locations, website visited, and more!
iKeyMonitor - iKeyMonitor is a mobile app for both iPhone and Android devices that with parental control capabilities and phone monitoring features.
Prey - Prey is a video game that has strong elements of science fiction, action, thrills, and much more.