Psi Dev

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Apps: 3

Total installs: 307K

Avg rating: ★ 3.88

Ratings: 1.1K

Latest release: Mar 24, 2026

How this developer operates

Carrier title Project Gutenberg holds 98% of the developer's installs — a one-app developer
Hit rate 33% of launches reach 100k installs (1 of 3 at least 30 days old)
Release rhythm a new app every ~1.4 years on average
Maintenance 1 of 3 apps updated in the last 90 days · last update 59 days ago

Listings that changed hands

App	Direction	Counterparty	When
Volume Booster - Loud speaker	← received (same company)	psi dev	Nov 5, 2026
Project Gutenberg -Book Reader	← received (same company)	psi dev	Nov 5, 2026
Project Gutenberg	← received (same company)	psi dev	Nov 5, 2026

All apps

App	Style	Rating	Installs	Released
Project Gutenberg	Education	★ 3.9	100,000+	Jul 6, 2023
Project Gutenberg -Book Reader	Education	—	1,000+	Sep 30, 2025
Volume Booster - Loud speaker	Music & Audio	—	1,000+	Mar 24, 2026