The Master Key System icon

The Master Key System

havu

⬇ 100+ downloads

Est. actual: 196

Free

Released: Feb 27, 2024

No in-app purchases

Contains ads

Signals

3 this week · 2 positive · 1 warning All of this week's signals →

📈Last 7 days 0 installs · 0/day since Oct 7
🏆Among Books & Reference apps bottom 0% by installs gained this week (308 peers growing)
🛠Updates dormant · updated 987 days ago

Installs since launch

+2 installs since Oct 7

Update history

1.1.0 Feb 28, 2024 · seen Oct 17, 2026

Only the current version so far — new entries appear as the app ships updates.

The Master Key System is a books & reference app by havu with 100+ downloads (about 196 estimated). Released Feb 27, 2024. Install growth, rank history, SDKs and ad networks.

From the store listing: “An Offline book "The Master Key System" by Charles F. Haanel”