Almost every time we travel with our baby monitor we discover on returning home that we’ve left at least one part of it behind, necessitating either a trip to retrieve it or getting someone to post it back to us. The irritation we feel at our own idiocy is even more acute in those situations when the monitor hasn’t actually done its job, whether because the distances involved were too great, or the signal was blocked by thick walls or floors.

Fortunately, some friends introduced us to the Baby Monitor 3G app; not only does our regular baby monitor now stay safely at home when we travel, but we can be confident that we’ll be able to keep an eye on the baby girl in whatever situation we find ourselves in while on the move.

It’s extremely simple to use. You just buy and download the app on two devices – it’s available on Apple and Android phones, watches and tablets, plus Mac computers and Apple TV – and pair them, nominating one as the ‘baby station’ and one as the ‘parent station’. The app runs live video (or just audio, which uses less data) over wifi or 3G networks, and you can change the sensitivity of the microphone to suit the surroundings.

The app costs between £3.59 and £4.99 per device, plus any data charges if you’re using it over 3G, but that’s it – no in-app purchases or anything of that rubbish. Great for grandparents or other family members who only need a baby monitor on an ad hoc basis, and also for travel scenarios where you don’t have access to mains power, such as when camping.

When travelling by myself with the baby girl I take an old handset along so I can keep both my phone and laptop with me while still using the app. The spare handset is useful for travelling as a family too – god forbid one of us having to cope without our phone for the evening: how would we tweet about what a nice time we were having?