Any software app or business can lead to lawsuits for any reason at all. Basically, if your company makes any kind of significant money, other people or busine

Any software app or business can lead to lawsuits for any reason at all. Basically, if your company makes any kind of significant money, other people or businesses will do whatever they can to try to take it from you. A well written terms of service for your application should include legalese to cover liability for use of the service ("you use the software at your own risk, you don't hold us responsible for damages due to use of the software, no expressed warranty, etc"). You're probably ok just using a sample terms of service if you are solo or small, but you will want to talk to an actual lawyer with experience in this stuff when your business grows and you start making significant money. Disclosure: I build legal case management software for large organizations, so I'm not a lawyer, but I am familiar with the kinds of things that companies get sued for (everything!).