If business school is in your future, than you can be reasonably certain that the GMAT or the GRE will be required. In order to decide which applicants merit a letter of acceptance, admissions officials at business schools often factor into the equation how you do on whichever test you do.

On the one hand, the GMAT, which is the more popular of the two, is a must for admission to the majority of business schools. On the other hand, the GRE is a must for acceptance into the majority of graduate schools and many business schools. In fact, the Princeton Review says that some 1,200 schools presently accept tests results from both the GMAT and the GRE.

Of course, it’s up to you to do your research and to figure out whether or not the business schools on your radar accept the GMAT, the GRE, or both. Once you’ve decide which test you need to do, however, you’ll want to prepare as much as possible since so much rides on the outcome.

With that said, what follows are some free practice tests for GMAT or GRE. What you’ll find in this article are reliable resources — broken down into the categories of websites, software, and apps as well as some information on how to steer clear of non-reputable practice tests.

Reliable Practice Tests: Websites

The Princeton Review Prep Test– With The Princeton Review GMAT, you can take advantage of practice exams that are as true to life as you can get. Find out by taking a full-length practice test under realistic testing conditions.

Veritas Prep: You can take advantage of practice tests for free on the Veritas Prep website. The computer-adaptive GMAT practice tests offered by the company are artificial intelligence-powered, which will provide you with true-to-life GMAT questions as well as accurate scores.

Kaplan Test Prep: For free GMAT practice tests, Kaplan provides a good option. The no-cost online practice tests can help you to boost your confidence and to score well when it comes time to take the actual test. The practice online test is designed to closely mirror the real test, so you’ll get a feel for exactly what to expect.

Manhattan Prep Practice Test: Manhattan Prep’s Section Adaptive GRE practice exams can provide you with everything you need to prepare for the real GRE test. Because the practice test is delivered online, you won’t have to worry about installing or downloading anything.

Reliable Practice Tests: Software

GMATPrep Software: On the official website of the GMAT, you can find the free GMATPrep software, which actually uses the same technology used for the official exam. The software includes, among other things, two full-length practice tests including the answers as well as 90 free questions including answers and explanations.

CATPrep Simulator: With CATPrep’s GMAT Simulator, you can take part in a free GMAT practice test session. It also contains a free question pool that’ll help with your preparation for the GMAT test.

POWERPREP: POWERPREP II is free software that you can use to prepare for the computer-delivered GRE revised general test. Among other things, the solution has a Test Preview Tool as well as a couple of practice tests.

Reliable Practice Tests: Apps

Prep4GMAT: Prep4GMAT is a mobile study app that you can use to study wherever you are and whenever you desire. Among the various features you can tap into include practice tests that will help you to prepare to succeed on test day.

GMAT Tutor: GMAT Tutor offers a free seven-day trial during which you can try out the app. With the app, you can study when and where you want.

GRE Prep App: You can use the GRE Prep App by TestBank to study for the GRE test. It contains 1,459 GRE questions, allows you to keep track of your performance, covers all subject matter, and offers simulated tests so that you’ll be ready for the real thing.

How to Avoid Useless Practice Tests

Just because a company offers free practice tests for GMAT or GRE doesn’t mean that you can necessarily rely on the resources. Stick with more reputable providers who have good reviews. If you come across a provider who you’ve never heard of before, then do some research to figure out how long the provider has been in business and what people who’ve used the serve have to say. By following this process, you’ll be able to focus on the practice tests that will actually help.