I have been using this app since Jan 2017, recommended by the school. It works well on my daughter’s Samsung S5 with no problem. Somehow it will only detected and started to run the daily hour limit if my kids touch the app on their ASUS. It doesn’t make sense for the kids to voluntarily ‘activate’ the app on their devices. And the most disappointing part, it is not working on my kid’s iPhone 5s. The apps disappeared for no obvious reason, blocked and locked at the wrong time. Since I already paid for one year subscription, I keep in touch with the support team and constantly try to figure it out, but so far the same problem happened again and again. I took the iPhone from my kid to and keep it with me so that I am certain that he didn’t swap up to close the app or did anything to compromise. It didn’t work. And because of all these technical issues, it causes disappointments among my kids since one is working and the rest ‘got the freedom’. Luckily they understand why I am controlling their devices and cooperate with me. But I decided to leave Screen Time Labs and now move to Kidslox.