nguyen thanh

Education is the main category at about 66.1% of apps, while the portfolio spans 11 categories. This is a moderately concentrated portfolio strategy.

Education

37 apps · 66.1%

Games

4 apps · 7.1%

Health & Fitness

3 apps · 5.4%

Productivity

3 apps · 5.4%

Utilities

3 apps · 5.4%

• The primary category Education accounts for 66.1%. Long-tail categories can reduce single-category risk.
• The diversification score is about 0.55 (0=highly concentrated, 1=highly diversified), useful for comparing developers.

The full portfolio has about 1.7K public ratings, a small public review base. It includes 56 free apps and 0 paid apps.

Apps

56

Total ratings

1.7K

Free / paid

56 / 0

• By review volume, the leading apps include: "4th grade learning games", "PowerMath: K-12 Math Learning", "5th Grade English".
• The visible list is free or priced at 0. Monetization may rely on subscriptions, ads, or in-app purchases; verify on the store page.

Weighted by rating volume, the portfolio averages about 4.46 stars; the simple average is 4.45 stars. The gap shows whether high-volume apps lift or drag the overall reputation.

Weighted avg

4.46 ★

Simple avg

4.45 ★

• The weighted and simple averages are close, suggesting reputation is relatively balanced across apps.
• 9 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.

• Low-rating watchlist (at least 80 ratings and below 4.0 stars): "PowerMath: K-12 Math Learning" 3.9★. Use App Store Connect exports or third-party data for semantic review analysis.
• Thin rating samples (under 50 ratings): "streaks habit tracker", "Stock x Investor", "Motivation Daily Quotes 2026". Star ratings can swing heavily until more feedback arrives.

The earliest listed app is "Sudoku ▢", while the newest or most recent listing signal is "Period Cycle Calculator". The span is a proxy for long-term iteration capacity.

Span

6 years+

• Earliest record in this dataset: 2020 (Sudoku ▢).
• Newer app signal: 2026 (Period Cycle Calculator).

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: 11 categories show whether a main-category plus extension structure matches your resources.
• Compare reputation structure: weighted 4.46 stars vs. the leading app "4th grade learning games" 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.