Cat Goetze has built her career in tech, but says even she’s made an effort to reduce her phone screen time.

The LA-based zillennial tech entrepreneur says earlier in her career, she felt she was on her phone too much and decided to make a concerted effort to curb the habit. She ended up going “off of social media almost entirely for five years.”

“I was screen-time sober, so to speak,” Goetze tells CNBC Make It.

Her quest to reduce her screen time led her to create Physical Phones, a landline-style phone that connects to smartphones via Bluetooth to place and receive calls. Goetze launched the business over the summer and sold $120,000 of them within three days, according to documents reviewed by Make It.

Goetze says she’s no longer fully off social media now that she creates online content for her brand as a tech founder, but she still makes an effort to stay off as much as possible. Aside from using her own product, Goetze says these five tips have helped her keep her screen time to a minimum: