TalentCove OKR App is extremely simple and user friendly. You simply add your team members, set objectives and define key results and everyone gets involved since everything is transparent (everyone can see them) and team members with assigned goals will feel accountable for achieving them
I can recommend HR software we are still using and have no problem with it. This is the product of Lanteria https://www.lanteria.com/ one of the most famous and successful companies specializing in HR software development. Lanteria HR helps us with our daily HR tasks, saving our HR manager time and making his workplace more efficient.