Parental control apps are a great way to monitor your children's activities online – especially over the Christmas and holiday period when you can be certain your little ones will be spending a lot of time online watching shows and movies on phones and tablets.

Right now Qustodio has 30% off its plans when you use the code BLACK30 at checkout. The offer ends 1 December, so you'll have to be quick.

If you're not already familiar, Qustodio is a parental control app which lets you monitor what your kids are doing online in real time – it's one we've recommended before for its granular settings.

You can block content, set time limits for games and social media, monitor SMS messages, and even track your child's location. Plus it works across various platforms: Windows, Mac OS X, iOS, Android and Kindle. See a list of all its features over at Qustodio. 

While you can sign up for a 3-day free trial, the premium options offer a whole year of service. There are three plans to choose from depending on how many devices you want covered:

  • Small Plan - Protects up to 5 devices - was £35.95, now £25.16 ( £10.79 off)
  • Medium Plan - Protects up to 10 devices - was £64.95, now 45.46 (£19.49 off)
  • Large Plan - Protects up to 15 devices - was £92.95, now £64.06 (£27.89 off)

Head to Qustodio to see its Black Friday weekend discounts now. Also see our round up of the best Black Friday and Cyber Monday deals.