I started GuestSpy after trying to find a parental control app that would tell me what it could and could not see. Most of them would not, so I ended up building one that does. I write the guides on this site myself, on the phones in my own house — a Samsung Galaxy A-series and a Pixel, both on Android 14. When a page says a menu sits three taps deep, I counted the taps. When a page says a feature cannot do something, it is because I tried it and it did not work. I am not a security researcher and I do not pretend to be one. What I have is three years of living with these tools in a house with teenagers, and a strong dislike of software that overstates itself.
- 71 articles published here
- Every guide is written, edited and checked by a person — see our editorial standards.
Guides by GuestSpy Editor

Monitoring a Child’s iPhone Openly: Screen Time, Family Sharing and the Limits
Apple’s monitor iPhone parental controls are better than their reputation and narrower than most advertising implies. Through Family Sharing and…

Track SMS Messages: Free SMS Monitoring Apps for Parents, Compared
You cannot track SMS messages on a child’s phone from your own phone alone, and no free app changes that.…

Track an Android Phone From Another Android Phone: Three Family-Safe Methods
To track an Android phone from another Android phone, you need one of three things arranged in advance. Find Hub…

5 Best Security and Network-Testing Apps for Android (Rooted and Not)
The useful security apps for Android are not the ones with “hack” in the title. They are a network scanner,…

Gmail Password Compromised? Four Recovery Routes Google Accepts
If your Gmail password was hacked, there are four routes back and the one that is open to you depends…

Facebook Account Hacked? Every Free Route Back In
If your Facebook account was hacked, five routes lead back in and all of them are free: a device of…

WhatsApp Privacy Settings That Cost Nothing and Stop Most Attacks
The WhatsApp privacy settings that matter are free, built in, and take about a quarter of an hour in total.…

WhatsApp Taken Over Online? Re-register Your Number and Close the Gaps
If your WhatsApp account has been hacked — you were signed out, and friends are suddenly getting money requests in…

7 Best Free Hidden Spy Apps for Android (100% Undetectable)
Spying app makes our life easier as we don’t have to worry about our kids and online safety constantly. There…

Three Settings That Secure an Instagram Account in Ten Minutes
Three changes secure an Instagram account against almost everything that realistically happens to one: a password that has never been…