Several websites offer the game for free; however, caution must be exercised when downloading from third-party sources. A few options are:

Many sites claiming to host a "verified" download will lock the file behind a survey wall. You will be asked to fill out questionnaires, input your phone number, or register for premium services. These are scams designed to harvest your personal data or charge your phone bill, and the promised game download rarely exists. Technical Issues with Pirated Older Versions (v1.27)