Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Registration Statement (the “Registration Statement”) on Form S-3 of Approach Resources Inc. (the “Company”) of our reports dated March 10, 2017, relating to the consolidated financial statements and the effectiveness of internal control over financial reporting of the Company, appearing in the Annual Report on Form 10-K of the Company for the year ended December 31, 2016. We also consent to the reference to our firm under the heading “Experts” in such Registration Statement.

/s/ Hein & Associates LLP

Dallas, Texas

September 15, 2017