SOINSU is a mobile math-puzzle game for iOS that trains mental arithmetic through prime factorization.
The App DNA
What makes this app unique?
Users hire the app for short-session brain training that uses high-tempo music to maintain focus during repetitive number-division tasks.
For Casual mobile gamers and students seeking mental arithmetic training through high-tempo, short-session puzzle gameplay.
What does it look like?
Key features
Visual library of 168 three-digit prime numbers in cyber-themed graphics. Revenue link: Ad-inventory expansion—unlocking items requires watching video ads.
High-tempo electronic music integrated into the gameplay loop. Revenue link: Retention lever—atmospheric audio design increases session duration.
Removes the 5-second response limit. Revenue link: Paid-gate—requires a one-time purchase to remove time constraints.
How much does it cost?
Freemium model utilizing rewarded video ads to gate collection content and single-purchase IAP for gameplay modification.
Velocity
Dormant developmentopaqueShow more...
The app has reached a zombie state, with no updates released in over two years. The last recorded activity was a minor update in August 2024, which provided only technical database corrections. There is no evidence of ongoing development, feature expansion, or live operations support.
Who built it?
User Sentiment
What do users think recently?
How are ratings & reviews evolving?
Not enough recent reviews to extract reliable themes yet.
Read the full review analysisCompetition
Competitive landscape for SOINSU math puzzle
How's the Games market?
SOINSU operates in the casual puzzle space with a single-purchase IAP model. The lack of updates for over 700 days positions the app as a legacy title rather than a growth-oriented competitor.
Read the market outlookThe rivals identified
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Access the full report for freeThe Analyst's Read
Key takeaways for SOINSU math puzzle
Where is it heading?
Casual puzzle traffic is consolidating around fresh entrants with high-frequency live-ops, leaving SOINSU exposed due to its two-year update silence. The app will likely see continued decline in visibility as the lack of active development prevents it from competing for chart placement against updated rivals.
- The 733-day update gap indicates the app is in maintenance mode, which prevents the team from responding to modern market retention trends.
- The existing prime number collection provides a stable, if static, value proposition that does not require frequent content updates to remain functional.
The SWOT
- Cyber-visual aesthetic and trance-music integration sustain a distinct atmosphere that differentiates the app from standard math-puzzle competitors.
- 168-piece prime number collection functions as a long-term engagement hook for completionist players.
- Expanding the prime number collection into a gamified educational curriculum could unlock B2B distribution potential within school partnerships.
Next best moves
Audit stability on modern iOS versions because the app has been in maintenance mode for two years → prevent churn from OS-level regressions.
The counter-intuitive read
The app's two-year update silence is not a…
Read the full takeSince the last report: The app's competitive outlook has shifted from stable to declining as the prolonged development freeze increases technical risk and market irrelevance.
Bottom line
SOINSU maintains a niche appeal through its unique audiovisual style, but the two-year development freeze risks total churn as the app falls behind modern performance standards, so the PM should prioritize a stability audit before considering any new content expansion.
Unlock 2 critical frictions, 1 market threat and the analyst’s take.
Access the full report for freeSources
- [1] App Store, source
Report last updated