The modern rocking chairs for your specific use depends on many factors. Once you identify the best style and construction of a rocking chair for your purposes, you will have to make sure you are getting a quality mark. You can do this by looking at the reviews of a particular brand name first and then consulting with a knowledgeable seller.
If you want modern rocking chairs for outdoor use, you will have to choose a rocking chair made of a material that supports well in the open. Plastic resins and similar hard rock plastic chairs have good weather resistance. As for the natural materials, rattan and wicker rocking chairs, sometimes with upholstered seats or backrests or removable cushions for rocking chairs, have had traditional use as outdoor rockers. Wicker and rattan withstand weather conditions better than solid wood rockers or fully upholstered rocker arms. You will have to remove the removable cushions on the outdoor rockers before the storms.
You can find in choosing a seesaw for indoor use that more than one modern rocking chairs suits your needs. For example, the best swing arm for any specific use depends both on its purpose and on its decoration. For a baby rocking chair, you can prefer a particularly comfortable rocking chair like an upholstered chair. Or perhaps you prefer a traditional wooden rocking chair, possibly with removable tilting cushions added for comfort.