RealURL is not compatible with TYPO3 7.0 because old compatibility classes were removed in TYPO3 7.0 but RealURL must be compatible with TYPO3 4.5.
I plan to release a new version of RealURL somewhere in March 2015. It will compatible with TYPO3 6.2 and newer TYPO3 versions (not with TYPO3 4.5). That new version will use different principles for building URLs: faster and more reliable. This will be completely new code. Configuration will be compatible with existing version with the exception of redirects: they will not be included into new RealURL because I strongly believe it is not a RealURL functionality and redirects should be done in a different way.
That's all news for now.