Smartphones are great, they not only let you make phone calls and send texts while you're on the go, but you can also listen to music, watch videos, surf the web and read documents. However, there's plenty of apps that can help turn your smartphone into a Swiss army knife-type device, with many other functions you probably never dreamed of. Here's our five favourites that will ensure you can do everything with your Apple iPhone device from a flash light to a compass.


Turn you smartphone into a torch and help you find whatever you've dropped under your bed or simply on the floor at the night. The Flashlight app fills your screen with bright white light and even lets you customise it by changing it different colours and adding effects such as strobe.

Unit - Converter

We know your smartphone has a calculator, but if you want to convert inches into centimeteres or imperial to metric weights, you'll need to remember the equation that'll let you do it. However, with this free app , you can simply input the unit you want to convert and let it do the hard work for you.

Digital Compass Free

Work out which direction you need to go with the help of Digital Compass Free.

Smart Measure

Smart Measure is a range-finder (telemeter) that calculates the distance and height of an object by trigonometry. Just stand up and press the shutter, first ensuring the camera is also aimed at the ground.

Spirit Level Free

This app means you can any of your smartphone's four sides against an object to test it for level or plumb, or lay it down on a flat surface for a 360 degree level.

Digital Thermometer

Find out the current outdoor temperature in Celsius or Fahrenheit based on your GPS position.