Thirty days is enough time to move your band, but only if the time goes toward your actual weak points instead of the skill you already like practising. Here is a simple structure to spend it well.
Week 1, find your real baseline
Start by sitting a full mock test across all four skills, under real timing, before you plan anything else. Guessing your level wastes days. Seeing your actual band per skill on the dashboard tells you exactly where the 30 days should go.
Weeks 2 and 3, target the weakest skill
Spend most of your time on whichever skill scored lowest, using the dedicated Listening, Reading, Writing or Speaking practice. Run a short Quick Mock Test every few days to check that the gains are showing up under exam conditions, not just in isolated drills.
Week 4, simulate the real thing
In the final days, shift back to full-length practice. Sit at least one more complete mock test under real conditions, ideally at the same time of day as your actual exam, and review the band breakdown rather than just the overall score.
The short version: diagnose first, target your weak skill, then rehearse the full test. All of it free, no sign-up.
Every test you run saves automatically, so by day 30 you have an actual record of progress, not just a feeling that you studied.