WARNING: looks like Apple has sandboxed Console data under iOS7 and that only apps own log is available. Therefore this app is totally useless in iOS7+ devices. Setting the app free until situation changes.
Console On Device can display application debug messages without a computer.
iPhone application developers can use NSLog to write useful debug information into iOS system console. Usually this is not visible to non-developers, but Console On Device lets you look real-time into the log inside the device. This allows application debugging in hardware on a field-test trip or lets a remote beta tester email log files to developer. If you are curious, you can also check what else is your device doing behind the scenes.
Usually reading console requires connecting your iPhone to a computer and running Xcode, iPhone Configuration Utility or built-in Mac OS X Console application, which isnt as easy as it might sound like. With Console On Device you just select an application and browse its log.
Supports portrait and landscape screen orientation, refresh on demand, grouping by application and emailing application log messages.