Program-application for aquarium tests produced by TM Ptero. Test users can now do without color scales in print. Just attach the sample vial to the white part of your smartphone screen and move the color scale to quantify the item.For ease of use, the program has a test timer and brief instructions for testing.It is also possible to record test results for five aquariums.Warning! Color scales are suitable only for tests manufactured by TM Ptero.