Tien Long Nguyen

Education is the main category at about 35.7% of apps, while the portfolio spans 8 categories. This is a relatively diversified portfolio strategy.

Education

5 apps · 35.7%

Weather

2 apps · 14.3%

Reference

2 apps · 14.3%

Utilities

1 apps · 7.1%

Productivity

1 apps · 7.1%

• The primary category Education accounts for 35.7%. Long-tail categories can reduce single-category risk.
• The diversification score is about 0.81 (0=highly concentrated, 1=highly diversified), useful for comparing developers.

The full portfolio has about 13.2K public ratings, a small public review base. It includes 14 free apps and 0 paid apps.

Apps

14

Total ratings

13.2K

Free / paid

14 / 0

• By review volume, the leading apps include: "Countdown Widget Maker", "Weather Widget®", "NOAA Live Weather Radar・Alert".
• 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 4.69 stars; the simple average is 4.60 stars. The gap shows whether high-volume apps lift or drag the overall reputation.

Weighted avg

4.69 ★

Simple avg

4.60 ★

• The weighted and simple averages are close, suggesting reputation is relatively balanced across apps.
• 1 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): "Free coloring books for Kids", "Vietnamese Vocabulary - Study Vietnamese language", "Langwid: Learn Spanish Easily". Star ratings can swing heavily until more feedback arrives.

The earliest listed app is "Weather Widget®", while the newest or most recent listing signal is "Langwid: Learn Chinese Easily". The span is a proxy for long-term iteration capacity.

Span

9 years+

• Earliest record in this dataset: 2016 (Weather Widget®).
• Newer app signal: 2025 (Langwid: Learn Chinese Easily).

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: 8 categories show whether a main-category plus extension structure matches your resources.
• Compare reputation structure: weighted 4.69 stars vs. the leading app "Countdown Widget Maker" 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.