Herbert Caller

Education is the main category at about 42.9% of apps, while the portfolio spans 7 categories. This is a relatively diversified portfolio strategy.

Education

9 apps · 42.9%

Book

6 apps · 28.6%

Games

2 apps · 9.5%

Reference

1 apps · 4.8%

Finance

1 apps · 4.8%

• The primary category Education accounts for 42.9%. Long-tail categories can reduce single-category risk.
• The diversification score is about 0.72 (0=highly concentrated, 1=highly diversified), useful for comparing developers.

The full portfolio has about 52 public ratings, a small public review base. It includes 20 free apps and 1 paid apps.

Apps

21

Total ratings

52

Free / paid

20 / 1

• By review volume, the leading apps include: "La Biblia Latinoamericana", "1769 KJV Bible", "ArXivLens".
• Free apps dominate, which often points to a utility entry point plus subscription or upgrade model.

Weighted by rating volume, the portfolio averages about 4.00 stars; the simple average is 3.02 stars. The gap shows whether high-volume apps lift or drag the overall reputation.

Weighted avg

4.00 ★

Simple avg

3.02 ★

• The weighted and simple averages differ meaningfully, indicating that high-review apps strongly shape perception.
• 18 apps have no public rating data, so long-tail performance is underrepresented.

The iTunes Search API does not provide review text. This card uses low star ratings with enough review volume as a proxy, and separately highlights apps with thin samples.

• No app triggered the low-rating plus sufficient-sample threshold.
• Thin rating samples (under 50 ratings): "ArXivLens", "1769 KJV Bible", "La Biblia Latinoamericana". Star ratings can swing heavily until more feedback arrives.

The earliest listed app is "ArXivLens", while the newest or most recent listing signal is "FoodMist". The span is a proxy for long-term iteration capacity.

Span

8 years+

• Earliest record in this dataset: 2018 (ArXivLens).
• Newer app signal: 2026 (FoodMist).

These takeaways are based on public metadata and are useful for competitor research or portfolio planning. Deeper conclusions require downloads, revenue, and review text.

• Study the category mix: 7 categories show whether a main-category plus extension structure matches your resources.
• Compare reputation structure: weighted 4.00 stars vs. the leading app "La Biblia Latinoamericana" and its review volume.
• For similar tools, prioritize review mining on lower-rated apps to find functional gaps; this requires store reviews or third-party data.