Reducer - calculate geometrical parameters and strength of bevel, cylindrical and worm gearing

There are three types of calculations:

Design new gears with center distance calculation, modification, helix angle.

Check most of geometrical parameters of gears and make tooth drawing.

Deciphering pinion after measurements to perform the drawing in the absence of documentation on it.

For more details about the types of calculations

Design gear - is recommended if you are designing a new transmission and you need to make center distance calculation or to check sum of modification coefficients or helix angle corresponding to a given center distance.
There is a separate application 'Design of gear trains' for this type of calculation for Android:

Android app 'Design of gear trains' on Huawei AppGallery

Gear Train - is recommended if you want to see most of the geometric parameters and gear tooth profiles are cut gears.
There is a separate application 'Gear Trains' for this type of calculation for Android:

Android app 'Gear Trains' on Huawei AppGallery

Gear deciphering - is designed to prepare the drawing of pinion by measuring the basic geometrical parameters. The calculation results (deciphering) could be useful if you make repair of mechanism with pinions and drawings of the pinion is absent.
There is a separate application 'Gear deciphering' for this type of calculation for Android:

Android app 'Gear deciphering' on Huawei AppGallery