RedCrab Register and Trial


Email Registration

Register your e-mail address. With registered e-mail address you will be informed about updates and news. In addition, you can unlock all functions of the RedCrab Calculator free of charge on a daily basis.

Basically, you can also use the RedCrab Calculator as a freeware without registration. However, you will have to forego the benefits listed above.

E-Mail registrieren Email Registrierung


Trial mode activation

Testmodus freischalten Get Trial Code

The activation of the full version is effective for 24 hours. After the time has elapsed, a new activation code can be requested here.


Why only 24 hours?


  1. Has it happened to you that you have activated the trial mode of a new software to get a first impression, but then had no time or no suitable project for a detailed test? If you have time or a project, the trial period is expired.

    That can not happen to you at RedCrab anymore! You can request an activation code on a daily basis if you need one. Until further notice the number of activations is not limited.


  2. Users who only rarely need a math software and therefore the purchase is uneconomical, can now access the full range of functions when needed.