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If your New Year’s resolution is to start earning passive income in the new year, then the stock market may be the place to start. There’s a pretty steep learning curve, but the right guide might help you reduce your risk and start investing the smart way.

Tykr Stock Screener follows more than 30,000 U.S. and international stocks to help you make informed investments. If you use coupon code STOCK between December 12 and December 19 during the Black Friday is Back promotion, you can get a lifetime subscription to Tykr for just $99.

The stock market doesn’t have to feel like gambling. Nothing can guarantee you’ll make money, but you don’t have to invest blindly. Tykr is an easy-to-use Stock screener that can show you whether it thinks a stock is on sale, overpriced, or should be watched for change.

Because the calculations are all open-source, you could even check how they’re done and do it yourself on stocks that aren’t supported. Tykr is an education and time-saving tool. As one reviewer put it, “I’ve been looking for a way to assess what stocks will be profitable to buy without spending hours a day to do it.

This subscription does all the number crunching for me so I can spend my time focusing on other things.” It may not feel like passive income if you’re crunching numbers all the time. Tykr could help take the busywork out of stock research so earning money can be fun.

Each supported stock also gets a safety score. The higher the score, the safer the investment. Double-check the margin of safety to get a sense for the potential returns you could earn. Then, it’s up to you to decide if you want to invest.

Until December 19, you can get a lifetime plan to Tykr Stock Screener for just $99 with coupon code STOCK.

Prices subject to change.