Hi Shbm,
As
rohan2345 mentioned, you could use the TTP course for 5 days, as we do offer a free trial through GMAT Club. That being said, since your current score is 550, it’s clear that you lack the GMAT quant and verbal fundamentals necessary for a high score, right? Thus, rather than bouncing around between free trials, you should consider using a paid course, so you can follow a linear and structured study plan, spending the time you need to improve your skills.
If you’d like some specific advice on how to improve your verbal and quant skills, feel free to reach back out, and I’d be happy to help. Also, you may find it helpful to read this article about
how to score a 700+ on the GMAT.
Good luck!