Ivy big number calculator for iOS, © 2015 the Go Authors, sold by Google, Inc

More information here -<p><a href="https:&#x2F;&#x2F;sourcegraph.com&#x2F;blog&#x2F;live&#x2F;gophercon2015&#x2F;123653512740" rel="nofollow">https:&#x2F;&#x2F;sourcegraph.com&#x2F;blog&#x2F;live&#x2F;gophercon2015&#x2F;123653512740</a><p>&quot;Example of porting a Go application to mobile ivy is a command line tool developed by Rob Pike.<p>It’s a useful desktop calculator that hangles big int, rational and floating-point numbers, vectors, matrices. It’s an interpreter for an APL-like language.<p>It is ~5k lines of Go code (not including tests, docs). It imports math, math&#x2F;big, unicode, etc.<p>Rewriting all that in Java or Objective-C would be a lot of work and is a non-starter, since this is already just works in Go.<p>After 2 hours, Hana had a working prorotype.&quot;

I found this via <a href="http:&#x2F;&#x2F;9to5mac.com&#x2F;2015&#x2F;07&#x2F;10&#x2F;google-ivy-experimental-big-number-calculator&#x2F;" rel="nofollow">http:&#x2F;&#x2F;9to5mac.com&#x2F;2015&#x2F;07&#x2F;10&#x2F;google-ivy-experimental-big-nu...</a>.<p>That article speculated that it&#x27;s a &quot;companion tool for the [Go Programming Language] project&quot;.<p>I couldn&#x27;t find any other references to iOS apps written using Go, so I&#x27;m going to speculate that Ivy itself was written in Go. :-)

While I understand accurate handling of big numbers is difficult, I&#x27;m surprised it&#x27;s not the general norm for calculator programs&#x2F;apps by now. Glad to see someone has done so (not the first, but they are rare).

...for certain definitions of big. 1e100000000 causes an app lock.<p>Also, what is going on with that app icon? Many startups nowadays have forced quirky-and-random mascots, but here it doesn&#x27;t make much sense.