Pixelcut is narrow on purpose. Against a white or flat studio background its one-tap eraser is hard to fault, and it asks nothing of your selection skills. Move to a photo with grass, brick or fabric behind the mark and the fill falls apart faster than Fotor’s does.
Fotor is the cheaper way to cover more ground: full resolution, both directions, five platforms, twenty-image batches. The free tier is the problem, since a Fotor watermark on the output defeats the exercise. Judge it on the paid tier or not at all — the Fotor review has the full breakdown.