If you knit only occasionally, you can start with just a manual ball winder as long as the skein is on a stable support that lets the yarn feed smoothly. Even so, pairing it with a table swift reduces tangles and keeps tension consistent while you form the yarn cake. For skeins that tend to collapse or twist, having both a ball winder and swift speeds up preparation and prevents interruptions caused by unexpected snags during winding.
If you don’t want to wind cakes and prefer to use skeins directly, a table swift is a good solution: it will release yarn smoothly as you work, without tangling.
If you knit from skeins often, combining a ball winder with a swift gives you regularity from the very first metre: the skein spins freely while the ball winder collects the yarn in a straight path. With only one tool, the process is more manual and requires more attention to tension and yarn guidance. With both, you standardise the workflow, reduce errors and focus on knitting instead of fixing poorly formed cakes.