There is no need to run both apps. Memory Cleaner complies with the new memory concepts introduced in OS X Mavericks. The memory values displayed by FreeMemory are invalid on OS X Yosemite, El Capitan and Mavericks.
On Mountain Lion (10.8) and Lion (10.7) Memory Cleaner also shows correct values. If you like the look and feel of FreeMemory better please let us know, so we can improve Memory Cleaner with the missing feature.