Each tool is designed to be useful in the field, so you don't need to bring a pile of equipment and notes with you to do estimations and calculations.

Taking advantage of your device's built in gyro, compass and camera, to give the most accurate results.

The Trig Instruments Tool Box contains:

• Ratio to Angle converter
• Inclinometer
• Tally counter
• Protractor

With more free tools being added all the time.

Download now to keep this tool box in your back pocket - you never know when they will come in handy.