Apple has punted hacker Stefan Esser's app designed to highlight the security posture and running processes on iOS devices.
The app System and Security Info shows detailed data on the state of security including possible anomalies like injected libraries and the state of code-signing and AppStore binary encryption, and a breakdown of any installed jailbreak.
"Currently, there is no publicly available infrastructure to support iOS diagnostic analysis," Apple wrote.
"Therefore your app may report inaccurate information which could mislead or confuse your users."
Esser says it amounts to Apple not wanting to give "the impression iOS could have security holes".
Esser, of German consultancy SektionEins, says the app was the only one on AppStore capable of showing running processes in iOS 9, adding it is capable of spotting iOS spyware that rely on modified public jailbreaks.
"The chance of detecting one of those is therefore high," Esser says.
Btw I am not releasing a jailbreak as payback. That would be dumb.— Stefan Esser (@i0n1c) May 15, 2016
The app did not exfiltrate data from devices.
Apple runs a hard line with security in an attempt to prevent tampering, and it is for this reason that it may be unsurprising that the app was taken down. ®