Smart Tools - All In One Box is the ultimate iOS toolbox kit that offers a wide range of carpenter, construction, and other useful tools and gauges. With 31 different tools, this app is like having a Swiss army knife on your iPhone.

The carpenter and construction toolbox includes essential tools such as a ruler, bubble level (spirit level), laser level, and a protractor with a plumb bob. Additionally, there is a magnifier feature that can come in handy for detailed work.

The gauges toolbox provides tools like a dB meter with a frequency spectrum, a distance and height meter, a speed gun (speed meter), and a stopwatch. There is even a metal detector (stud finder) for those who need to locate hidden objects.

In addition to these, Smart Tools - All In One Box offers a variety of other handy tools. There is a unit converter, which also includes a currency converter, making it convenient for travelers. The app also includes a code reader for QR codes and barcodes, an accelerometer, night vision, a dog whistle, a metronome, and much more.

This app is available for free, but it does come with advertisements. However, there is an option to remove the ads with a paid upgrade.