If you're looking for a solution that provides Version Control and a lot of other useful feature you might want to check out Platform Manager. Besides integrated version control this product also provides difference analyses, data lineage and promotion capabilities. This makes it a lot easier to work with multiple developers and see what your colleagues are doing. Here's a small screenshot of the differences that you can use to determine what needs to be tested for instance:
If you have a small team and not too many changes in a year the generic version control solutions might provide enough features to keep you going. But if your number of QlikView or Qlik Sense apps is growing and you have multiple developers the benefits of Platform Manager will be tremendous resulting in structure, control and increase of your development speed.
Hope this helps.