Offset Branch Developer is an Android-based application developed by Gellis apps. It falls under the category of Utilities & Tools and is available for free. The app is designed to help fabricators quickly develop the pattern for the branch pipe shape and the pattern for the shell hole shape.

Developed by a fabricator with 40+ years of experience, Offset Branch Developer enables users to input required dimensions and select the type of branch development they need from the front screen. From there, the user can select either paper wrap pattern development or mark on plate pattern development on the next screen. The app then displays the developed length of the branch circumference and pitch of the developing lines at the top of the results page, with the true developed lengths shown below.

The app also displays the grid line dimensions for the hole pattern below the hole pattern drawing, along with the dimension between the shell center line and the branch center line. It's worth noting that the drawings for the branch and hole patterns on the results screen are representative only and show the general shape of the true patterns.

Overall, Offset Branch Developer is an excellent tool for fabricators who want to save time and effort in calculating developed lengths. It is a simple and straightforward app that delivers accurate results in a matter of seconds.