Dr. Ralph Heider
Known for
SQL Primer
SQL Primer
Snapshot
Publisher DNA
What defines Dr. Ralph Heider?
AI intelligence is not yet available for Dr. Ralph Heider. The portfolio data below is up to date.
Portfolio
What does Dr. Ralph Heider ship?
Apps
1 app analysed
Visual aids for complex topics like outer joins provide clarity for students in classroom settings
- Simple and focused presentation of SQL syntax examples makes learning basic concepts accessible for beginners
- Limited content depth fails to provide value for users who already possess professional SQL experience
Tightly focused on 2 markets (Germany, United States).
Based on 1 of 1 app with localized market data · last scanned .
Americas (1)
- United States1 / 1
Europe (1)
- Germany1 / 1
Core markets (1/1 apps)
GermanyUnited States
User Sentiment
How do users feel about their apps?
1
Positive apps
0
Neutral / mixed
0
Negative apps
65/100
Avg sentiment score
Frequently asked questions
How many apps does Dr. Ralph Heider publish?
Dr. Ralph Heider has 1 app tracked by Marlvel, primarily in the Education category.
What kind of apps does Dr. Ralph Heider make?
Dr. Ralph Heider's portfolio is concentrated in Education, with an average rating of 3.2/5 across rated apps.
What is Dr. Ralph Heider's top app?
By review volume across the portfolio, SQL Primer is Dr. Ralph Heider's best-known app tracked by Marlvel.
In how many countries are Dr. Ralph Heider's apps available?
Marlvel has tracked Dr. Ralph Heider's apps across 2 countries.
