I'm confused on this

Semaja • CNA. First time mom. Nursing student. Happy where I'm at 😌.
Okay another preggie around me posted her US and said she was like 9 weeks and some days she's about probably 10 now but yeah she said she's due April 22nd but the app says I'm more then her and I'm due May 2nd I'm confused. Could my due date be wrong? Or I could be more or less then I thought? Or she's lying?