There are 12 sun signs and 8 billion people. When an app tells "all Scorpios" the same thing, they're giving one reading to 670 million people. Real astrology doesn't work that way.
Your chart has a rising sign, a moon sign, 10 planetary placements, 12 house positions, and dozens of aspects. A sun-sign horoscope ignores 95% of it. BirthChart uses all of it.