Apps calculate from the 1st day of your last period, making it 4 weeks. Though you’re actually 1-2 weeks. If that makes sense

On the test instructions it actually tells you to add 2 weeks to the result.. You're 4 weeks pregnant

As previous person stated apps and drs calculate from first day of last period. Digital tests calculate from conception

those tests tell you how many weeks from conception.

1-2 weeks is period and ovulation. When you're 1-2 weeks according to your LMP you're 3-4 weeks