Smart Tools is an Android app that turns your phone into a Swiss Army Knife comprising ruler and protractor, tape measure, compass, flashlight and noise measure. As such it is probably best described as a collection of apps and, indeed, the composite parts are available as independent tools, often for free or at most 60p a pop.

The full set of Smart Tools for your Android smartphone and Android tablet reads like this (takes deep breath): Smart Ruler Pro which measures length, angle, slope and level; Smart Measure Pro (distance, height, width and area); Smart Compass Pro comprises compass, metal detector and GPS; Sound Meter Pro which measures sound and vibrations; and the flashlight app, inevitably known as Smart Light Pro. Not a bad little collection for just £1.60, especially when you consider that the individual Pro apps will set you back 60p each.

The Smart Tools work well, by and large. The combined app is well designed so that it looks good and works simply, making good use of Android's dedicated settings button. In very few cases were we stumped as to what to do for even a few minutes as to how to use the composite apps.