DescriptionTo determine the size of the duct constant pressure method, static pressure regain method, total pressure method, velocity method. Generally uses constant pressure method. This constant pressure method is how to determine the duct dimensions using the same value per 1 m on all duct friction loss. Usually determined by flow diagrams or duct design for slide rules. You can easily determine the duct by using this program.Windows version with almost the same usage. Has put the General style is free to change and can save settings as.As well as the Windows version in the text box to flow formulas can be used.Operators ^, *, /, %, +,- constant piFunctions sin, cos, tan, asin, acos, atan, sinh, cosh, tanh , sqrt, log, ln, exp, bin, oct, dec, hexYou can use the variable.If multiple air vents, for example one place 540 CMH A = 540 [ENTER]---(assigned to A 540) 540 A * 4 [ENTER] 2160 ---(computed 540 * 4)Screen size, touch screen, two finger scaling can be.Operating environmentAndroid version（ OK: operation allowed NG: not working ）NG: Android 1.0.xNG: Android 1.1.xNG: Cupcake (1.5.x)NG: Donut (1.6.x)NG: Eclair (2.0.x, 2.1.x)NG: Froyo (2.2.x)OK: Gingerbread (2.3.x)NG: Honeycomb (3.x) OK: Ice Cream Sandwich (4.0.x)OK: Jelly Bean (4.1.x, 4.2.x, and 4.3.x)OK: KitKat (4.4)OK: Lollipop (5.0)Ready CPU.ARM based CPU / SoCARM v7 or later CPU / SoCNEON (Advanced SIMD) supportPurchase cancellationIn your terminal program that doesn't workYou can return it within two hours for a full refund.For more informationhttps://support.google.com/googleplay/answer/134336?rd=1&hl=enIn the past 2 hours after your order cannot be cancelled.