GeCla (*) Resize


Download (+)

Atractor developed a new version of the GeCla program (short for "Generator and Classifier"), a program aimed at the study of symmetry. This version is available not only for PC (Windows and Mac), but also for tablet/smartphone (Android and iOS), and it can be downloaded for free(++):

If you want to use a version for children, install GeClaMini.


PC installation:

How to overcome the security restrictions when installing GeCla


For the tablet/smartphone version, go to GooglePlay or AppStore using your device.


Remark To use "Practice/2 devices online" mode or to watch images created with the GeCla Generator being stamped, you must have internet access.

Version 2.07.10 - 2024/10/29 (Windows)
Version 2.07.08 - 2024/07/26 (Android)
Version 2.07.07 - 2024/07/05 (Mac)
Version 2.07.06 - 2023/09/20 (iOS)
Languages presently supported: idiomasfranca


If you want to use the help mode to classify, in the new version of GeCla, images that were produced by the old version of the program, you need to update those images using this Converter.

(+) For the development of this program, the support of Fundação para a Ciência e a Tecnologia (FCT) was decisive: initially, through a long-term grant to work at Atractor and, later, in the framework of FACC.
Also important were: i) the collaboration of a secondary school teacher working full-time with Atractor, thanks to support from Ministry of education, and ii) the support of University of Porto, by making the location where the work was carried out available.

(++) See Use of Atractor's materials
Translated for Atractor by Gabriela Chaves, from its original version in Portuguese. Atractor is grateful for her cooperation.

(*) Difficulty level: Lower Secondary, Upper Secondary