Ji Mo

Photo & Video is the main category at about 40% of apps, while the portfolio spans 4 categories. This is a relatively diversified portfolio strategy.

Photo & Video

2 apps · 40%

Health & Fitness

1 apps · 20%

Book

1 apps · 20%

Productivity

1 apps · 20%

• The primary category Photo & Video accounts for 40%. 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 41 public ratings, a small public review base. It includes 5 free apps and 0 paid apps.

Apps

5

Total ratings

41

Free / paid

5 / 0

• By review volume, the leading apps include: "MarkTimes", "InRead - Read Later", "灵感 - 记录灵感和兴趣".
• 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 4.98 stars; the simple average is 4.98 stars. The gap shows whether high-volume apps lift or drag the overall reputation.

Weighted avg

4.98 ★

Simple avg

4.98 ★

• The weighted and simple averages are close, suggesting reputation is relatively balanced across apps.
• 4 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): "MarkTimes". Star ratings can swing heavily until more feedback arrives.

The earliest listed app is "灵感 - 记录灵感和兴趣", while the newest or most recent listing signal is "Foto - Photo Diary & Memories". The span is a proxy for long-term iteration capacity.

Span

3 years+

• Earliest record in this dataset: 2023 (灵感 - 记录灵感和兴趣).
• Newer app signal: 2026 (Foto - Photo Diary & Memories).

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: 4 categories show whether a main-category plus extension structure matches your resources.
• Compare reputation structure: weighted 4.98 stars vs. the leading app "MarkTimes" 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.