
Jeremy D. answered 05/23/19
2 Masters Degrees, College Professor, Tutoring 5+ years
The only GMAT practice tests I recommend are the ones provided by GMAC (the makers of the GMAT). If you go to their official website, MBA.com, you can gain access to 2 free practice tests right away. These are by far the most appropriate and most accurate to gauge your current progress. Virtually all professional test prep services will give the same advice.
Now, with that said, I do not recommend taking both practice tests right away. Study is more important. I recommend an initial test to determine your relative strengths. Then create a study plan to address those areas needing improvement. Only take the next practice test after rigorous study to gauge your progress.
Good luck!