A footrest is worthwhile at a minimalist desk when the chair must be raised for keyboard height and the users feet no longer rest comfortably on the floor. It should solve a measured posture gap, not become another object added only for appearance.
Test the missing height safely
Set the chair so shoulders relax and forearms reach the keyboard without lifting. If the feet hang or pressure builds under the thighs, trial a stable non-slip platform of known height. Check knee angle, ankle movement and clearance throughout a normal work session.
No footrest has confirmed pricing in the supplied evidence. The HBADA E3 Pro chair at R5,700 and GAMDIAS ZELUS E5 at R1,540 are verified seating references, not proof that a foot support is needed. The Dell S2725QC monitor at R6,128 is a separate desk reference. Verify current dimensions, height or angle adjustment, surface grip, stability, cleaning and warranty.
Keep the platform from sliding into walkways and allow the legs to change position. A footrest should not force the knees sharply upward. Persistent pain, swelling, numbness or weakness requires qualified medical or ergonomic guidance.
Buy after the temporary trial improves comfort without crowding the desk. Correct chair, keyboard and monitor placement first so the accessory addresses the real remaining gap.
Refining a minimalist workspace? > Compare Evetech ergonomic chairs after measuring the complete seated position.