How about <a href="https:&#x2F;&#x2F;mad.cs.fau.de&#x2F;fasl&#x2F;" rel="nofollow">https:&#x2F;&#x2F;mad.cs.fau.de&#x2F;fasl&#x2F;</a>?<p>Unfortunately, the development seems to have completely stalled and the site&#x27;s partially dead, but it&#x27;s still in the Play Store: <a href="https:&#x2F;&#x2F;play.google.com&#x2F;store&#x2F;apps&#x2F;details?id=de.fau.cs.mad.fasl" rel="nofollow">https:&#x2F;&#x2F;play.google.com&#x2F;store&#x2F;apps&#x2F;details?id=de.fau.cs.mad....</a>, and the source&#x27;s on Bitbucket: <a href="https:&#x2F;&#x2F;bitbucket.org&#x2F;mad_fau&#x2F;fasl" rel="nofollow">https:&#x2F;&#x2F;bitbucket.org&#x2F;mad_fau&#x2F;fasl</a>