The Sign of the Four icon

The Sign of the Four

Virtual Entertainment

⬇ 50+ downloads

Est. actual: 78

Free

Released: Jul 13, 2023

No in-app purchases

Contains ads

Signals

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

📈Last 7 days 0 installs · 0/day since Oct 9
🏆Among Books & Reference apps bottom 0% by installs gained this week (219 peers growing)
🛠Updates quiet · updated 110 days ago

Installs since launch

0 installs since Oct 9

Update history

9.3 Jul 28, 2026 · seen Oct 17, 2026

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

The Sign of the Four is a books & reference app by Virtual Entertainment with 50+ downloads (about 78 estimated). Released Jul 13, 2023. Install growth, rank history, SDKs and ad networks.

From the store listing: “A young lady, Mary Morstan, comes to Sherlock Holmes and asks the detective...”