Independent iPhone developer Smells Like Donkey has revealed that its Tap-Fu game saw piracy levels above 80% in its first week of availability.

The company released the data in a blog post, showing how it tracks scores submitted to the game's online leaderboards.

What's more, the conversion rate was a big fat 0% - none of these people who pirated the game subsequently bought it.

"Because Apple has been fairly slow to respond to this and because piracy is becoming very commonplace, we're predicting that developers will be taking it into their own hands to try and prevent it," suggests Smells Like Donkey.

Apple hasn't been keen on developers discussing the levels of iPhone game piracy, but several others have broken cover with their stories in the past.

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Earlier this month, ngmoco VP Alan Yu revealed that its games tend to suffer a 50-90% piracy rate in their first week of release.

Meanwhile, the developer of iPhone game The Little Tank That Could reported that the game had been bought by only 45 people in its first week on sale, yet had more than 1,000 players posting high scores.