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Parents' guide

Kids’ Smartwatch or First Phone? How to Decide

A smartwatch and a first phone solve different problems. Compare safety, contact, cost and screen time to decide what suits your child right now.

2 min read 29 September 2026 By the Blackview Watches team

Blackview Z40 Pro kids smartwatch in blue and pink

At some point, usually around the time children start doing things without you, the question comes up: do they need a way to stay in touch? For many families the choice is between a first phone and a kids’ smartwatch. They overlap, but they are built for different jobs.

What a kids’ smartwatch is designed for

A kids’ smartwatch is a communication and safety tool first. A 4G model like the Blackview Z40 Pro lets your child:

  • make voice and video calls to the contacts you approve,
  • send voice messages,
  • press an SOS button that alerts the family,
  • share their location with you through the parent app.

Everything is set from your phone: who can call, when the watch goes quiet for class, and the safe zones that trigger an alert when your child arrives or leaves.

What a first phone adds

A smartphone opens the door to apps, messaging groups, the web, games and social media. That can be exactly right for an older child who needs to coordinate with friends, but it also brings the questions every parent knows: screen time, group chats, content filters and a device that is easy to lose or break.

Side by side

Kids’ 4G smartwatch First smartphone
Who they can talk to Only contacts you approve Anyone, unless you set controls
Location sharing Built in, managed by you Possible with apps and settings
Internet and apps Limited to the watch’s own features Full access, filters needed
Easy to lose Worn on the wrist In a bag or pocket
Upfront cost Usually lower Usually higher

Signs a smartwatch is the right fit

  • Your child is starting to walk to school, a club or a friend’s house on their own.
  • You mainly want them to be able to reach you, and you them.
  • You would rather delay social media and open internet access.
  • They tend to lose things that are not attached to them.

Signs they may be ready for a phone

  • They travel independently most days, including on public transport.
  • Their school and friends organise things through apps.
  • They have shown they can manage screen time and privacy settings with you.

It does not have to be either or

Plenty of families use a smartwatch as a stepping stone. It builds the habits that matter later, like answering when a parent calls, checking in on arrival and understanding location sharing, without the full weight of a smartphone. When the time comes for a phone, the watch often stays in use for sports and clubs.

If you are weighing up the timing, our guide on what age a child should get a smartwatch may help. And if you decide on a watch, start with choosing the right SIM.

This guide is general information for UK parents. Features and network details can change, so check the latest information from your mobile network and your child's school.

Ready when they are

GPS, 4G video calls and SOS, on a watch they will want to wear.

  • Free UK delivery
  • 2-year warranty
  • 30-day returns
Shop the Blackview Z40 Pro, £79.99
Blackview Z40 Pro kids smartwatch in blue and pink

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  3. How to Choose a SIM Card for a Kids’ Smartwatch in the UK A kids' 4G smartwatch needs its own SIM. Here is what to look for in the UK: 4G and VoLTE, data, calls, pay as you go or monthly, and the PIN lock trap. 3 min read
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