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Disclaimer This press release contains forward-looking statements made under the "safe harbor" provisions of Section 21 E of the Securities Exchange Act of 1934, as amended, and the U. S. Private Securities Litigation Reform Act of 1995. These forward-looking statements can be identified by terminology such as "will, " "expects, " "anticipates, " "future, " "intends, " "plans, " "believes, " "estimates, " "confident" and similar statements. Coo. Tek may also make written or oral forward-looking statements in its reports filed with or furnished to the U. S. Securities and Exchange Commission, in its annual report to shareholders, in press releases and other written materials and in oral statements made by its officers, directors or employees to third parties. Any statements that are not historical facts, including statements about Coo. Tek's beliefs and expectations, are forward-looking statements that involve factors, risks and uncertainties that could cause actual results to differ materially from those in the forward-looking statements. Such factors and risks include, but not limited to the following: Coo. Tek’s mission and strategies; future business development, financial conditions and results of operations; the expected growth of the mobile internet industry and mobile advertising industry; the expected growth of mobile advertising; expectations regarding demand for and market acceptance of our products and services; competition in mobile application and advertising industry; and relevant government policies and regulations relating to the industry. Further information regarding these and other risks, uncertainties or factors is included in the Company's filings with the U. S. Securities and Exchange Commission. All information provided in this press release is current as of the date of the press release, and Coo. Tek does not undertake any obligation to update such information, except as required under applicable law. To supplement the unaudited consolidated financial information prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”), the Company uses non-GAAP financial measure of adjusted net income (loss) that is adjusted from results based on GAAP to exclude the impact of share-based compensation and compensation expense related to ordinary share repurchase. The measure should be considered in addition to results prepared in accordance with GAAP, but should not be considered a substitute for, or superior to, GAAP results. The Company believes that the non-GAAP measure help identify underlying financial and business trends relating to the Company’s results of operations that could otherwise be distorted by the effect of certain expenses that the Company include in (loss) income from operations and net (loss) income. By making the Company’s financial results comparable period over period, the Company believes adjusted net (loss) income provides useful information to better understand the Company’s historical business operations and future prospects and allows for greater visibility with respect to key metrics used by the management in financial and operational decisionmaking. In order to mitigate these limitations, the Company has provided specific information regarding the GAAP amounts excluded from the non-GAAP measure. The table at the bottom of this press release includes details on the reconciliation between GAAP financial measure that is most directly comparable to the non-GAAP financial measure the Company has presented. 2

DAU and MAU Trends Portfolio Products DAUs Touch. Pal Smart Input MAUs Engagement 37, 5% DAUs 40, 0% 36, 7% 50 30, 4% 30, 9% 31, 9% 32, 6% 46, 1 MAUs Engagement 73, 8% 73, 9% 73, 0% 220 71, 6% 190, 5 35, 0% 180, 0 68, 8% 170 161, 6 66, 2% 40 148, 2 33, 7 25, 0% 63, 9% 131, 6 20, 0% 125, 4 30 113, 8 120 16, 9 14, 4 11, 0 9, 4 0, 1 0, 5 0, 3 0, 8 0, 7 2, 3 2, 9 4, 6 0 65, 0% 60, 0% 88, 7 75, 3 10, 0% 70 7, 3 10 140, 8 101, 9 96, 6 15, 0% 20 132, 9 115, 7 20, 0% 22, 2 70, 0% 171, 7 67, 4% 30, 0% 61, 7 55, 0% 0, 0% Mar' 17 Jun' 17 Sep'17 Dec'17 Mar' 18 Jun' 18 Sep'18 Dec'18 50, 0% 20 Mar' 17 Jun' 17 Sep'17 Dec'17 Mar' 18 Jun' 18 Sep'18 Dec'18 3

Revenue Advertising others (in US$ million) 160, 0 134. 1 47. 0 2, 8 0, 5 140, 0 120, 0 36. 8 259% Annual Growth 28. 4 100, 0 21. 9 80, 0 19. 0 131, 3 60, 0 37. 3 20, 0 0, 7 46, 5 1, 1 1, 4 36, 3 9. 2 40, 0 2, 3 35, 0 0, 2 3, 1 5. 8 0, 5 0, 2 5, 6 0, 5 27, 7 17, 6 20, 8 8, 7 0, 0 FY 2017 FY 2018 1 Q 17 2 Q 17 3 Q 17 4 Q 17 1 Q 18 2 Q 18 3 Q 18 4

Revenue 2018 Ads revenue contribution percentage 15% 4 Q 2018 Ads revenue contribution percentage 10% 22% 63% Portfolio Products Smart input 70% Phonebook Portfolio Products Smart input Phonebook 5

Cost and Expenses as a % of Revenue Cost of Rev. S&M R&D G&A other income/exp, net 178, 0% 164. 2% 92. 3% Cost of Rev. S&M R&D G&A other income/exp, net 112. 8% 93. 9% 92. 3% 92. 8% 8, 5% 8, 0% 8, 1% 17, 5% 15, 8% 14, 1% 48, 8% 55, 2% 61, 3% 67, 2% 9, 3% 7, 4% -3, 2% 3 Q 18 4 Q 18 91. 5% 116, 0% 158, 0% 22, 4% 15, 7% 138, 0% 96, 0% 34, 5% 18, 9% 7, 7% 118, 0% 76, 0% 12, 4% 98, 0% 78, 0% 54, 0% 8, 0% 14, 4% 56, 0% 51, 7% 58, 0% 36, 0% 60, 0% 38, 0% 53, 8% 16, 0% 18, 0% -2, 0% -0, 5% 11, 1% -1, 2% 26, 7% 19, 2% -0, 1% 13, 5% -0, 2% 4 Q 17 1 Q 18 2 Q 18 -4, 0% FY 2017 FY 2018 6

Profit and Profit Margin Net Profit Adjusted Net Profit 10. 4% 9. 5% 7. 7% 4 500 8. 7% 9 500 10 386 4 500 12 745 9. 4% 3 500 9. 7% 7. 6% 4 887 7. 5% 2 500 (500) 6. 3% 1 500 4 076 7. 5% 3 456 2 752 (5 500) 1 373 1 650 2 798 2 139 500 (10 500) -23 661 -21 236 (500) (15 500) (2 253) (2 039) (1 500) (20 500) (25 500) (56. 9% ) (63. 4% ) FY 2017 (2 500) FY 2018 (11. 8% ) (10. 7% ) 4 Q 17 1 Q 18 2 Q 18 3 Q 18 4 Q 18 7

Business Outlook US$ in million Total Revenue FY 17 Actual 4 Q 2018 Actual 1 Q 2019 Guidance Implied Y/Y 37. 3 47 40 ~ 42 82%~92% 8

GAAP and Non-GAAP reconciliation US$ in thousands Net (loss) income Share-based Compensation related to share options and restricted share units Compensation expense related to ordinary share repurchase Adjusted Net (Loss) Income 1 Q 2017 2 Q 2017 3 Q 2017 4 Q 2017 1 Q 2018 2 Q 2018 3 Q 2018 4 Q 2018 (10, 771) (5, 464) (5, 173) (2, 253) 1, 373 2, 139 2, 798 4, 076 220 211 232 214 277 613 658 811 1, 548 - - - - (9, 003) (5, 253) (4, 941) (2, 039) 1, 650 2, 752 3, 456 4, 887 9