SonarSource delivers what is probably the best static code analyzer you can find on the market for Objective-C. Based on our own Objective-C compiler front-end, it uses the most advanced techniques (pattern matching, dataflow analysis) to analyze code and find code smells, bugs and security vulnerabilities. As for any product we develop at SonarSource, it was built on the following principles: depth, accuracy and speed.
SonarCFamily for Objective-C has a great coverage of well-established quality standards. The SonarCFamily for Objective-C capability is available in any development chain for automated code review with self-hosted SonarQube or on-line SonarCloud.
SonarCFamily for Objective-C supports all the standard metrics implemented by SonarQube including Cognitive Complexity. Additionally, it supports the import of LLVM-cov Coverage reports.
SonarCFamily for Objective-C doesn't yet provide the ability to write custom rules.