Square to Round Developer
Square to Round Developer Summary
Square to Round Developer is a mobile Android app in Tools by Gellis apps. Released in Jun 2015 (10 years ago). It has about 5.7K+ installs Based on AppGoblin estimates, it reaches roughly 208 monthly active users . Store metadata: updated Oct 21, 2025.
Recent activity: 9.00 installs this week (44 over 4 weeks) showing steady growth View trends →
Store info: Last updated on Google Play on Oct 21, 2025 .
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App Description
Sheet metal developing tool for square/rectangles to rounds
As a fabricator of 40+ years, the last 30 or so as the workshop manager, I have constantly used trigonometry etc. to calculate cones, segmental bends and much more. Nowadays I am constantly asked by the fabricators to calculate developed lengths etc. to save them the time and effort of laying it out. I have developed this app so that they can do it for themselves and therefore save “MY TIME”.
With this app you can quickly and easily develop patterns for square to rounds, rectangle to rounds, rounds to squares and round to rectangles. Simply choose the type of square to round you wish to develop, enter the required outside dimensions and material thickness then press develop. The developed pattern can then be marked onto the plate ready for cutting and shaping. Instructions on how to mark out completely by hand and how to mark developed pattern onto plate are included.
I hope that from your feedback/comments I will be able to add extra relevant features and amendments in future editions.