Gizmo: AI Tutor vs Bookshelf
Gizmo: AI Tutor
Save All
App Store
$4.6K/mo
~$55.1K/yr · 1.1M installs
VS
Bookshelf
Vital Source Technologies
Google Play
$0/mo
~$0/yr · 4.9M installs
Revenue winner
Gizmo: AI Tutor wins
+458900% vs other
Installs winner
Bookshelf wins
+324% vs other
MAU winner
Bookshelf wins
+103% vs other
Rating winner
Gizmo: AI Tutor wins
+10% vs other
Why Gizmo: AI Tutor is winning
Top 3 reasons - backed by the public App Store / Play Store numbers.
- Gizmo: AI Tutor earns roughly 4589× more per month than Bookshelf - $4.6K vs $0.
- Subscription model. Gizmo: AI Tutor runs a $6.99/mo subscription that compounds; Bookshelf relies on one-shot IAP or ads.
- Better app store reviews. Gizmo: AI Tutor sits at 4.76★ vs 4.31★ - store algorithms reward higher-rated apps with more impressions.
→ Find more apps with this revenue gap · Full Gizmo: AI Tutor report
Side-by-side metrics
Bars scale to whichever app is bigger on that row. Green = winner.
Gizmo: AI Tutor
vs
Bookshelf
Monthly revenue (est.)?
$4.6K
◀
$0
Annual revenue (est.)
$55.1K
◀
$0
Lifetime installs (est.)
1.1M
▶
4.9M
Monthly active users (est.)?
137K
▶
277K
App Store rating
4.76★
◀
4.31★
Total ratings
10K
▶
18K
US grossing rank
-
=
-
Cheapest monthly sub
$6.99
◀
No sub
IAP tiers detected
1 tiers
◀
0 tiers
- Category
- Education
- Price
- Free
- Released
- Feb 17, 2022
- Last updated
- May 5, 2026
- File size
- 154.5 MB
- Content rating
- 4+
- Version
- 3.0.101
- Languages
- English
- Category
- Education
- Price
- Free
- Released
- Mar 29, 2012
- Last updated
- Mar 10, 2026
- File size
- -
- Content rating
- Everyone
- Version
- 11.3.1
- Languages
- -
Gizmo: AI Tutor trajectory
Bookshelf trajectory
FAQ
Which makes more money, Gizmo: AI Tutor or Bookshelf? v
Gizmo: AI Tutor earns about $4.6K per month, while Bookshelf earns about $0. That is a ∞× revenue gap (~$4.6K more per month for Gizmo: AI Tutor). Annual revenue: Gizmo: AI Tutor ≈ $55.1K/year, Bookshelf ≈ $0/year. Estimates are derived from public App Store / Google Play signals - grossing rank, scraped IAP tiers, ratings and category benchmarks.
Which has more downloads, Gizmo: AI Tutor or Bookshelf? v
Bookshelf leads with about 4.9M estimated downloads vs 1.1M for Gizmo: AI Tutor - a 4.2× gap. Gizmo: AI Tutor's App Store downloads are estimated from 10K ratings × the standard 1:75 ratio. Bookshelf reports 1,000,000+ installs on Google Play.
Are Gizmo: AI Tutor and Bookshelf in the same App Store category on each store and competing for the same money? v
Yes - both apps sit in the Education category, which means they compete directly for the same paying users and category-level wallet share. Direct competitors, head-to-head.
What in-app purchases and subscription pricing do Gizmo: AI Tutor and Bookshelf offer? v
Gizmo: AI Tutor: IAP range 1 tiers detected. Bookshelf: no IAP detected on the public listing. Gizmo: AI Tutor runs a "Free casual game · ad-supported (~$0.04/MAU)" monetization model; Bookshelf runs "No App Store revenue (monetizes off-store)". Scraped tier prices and detected subscription pricing drive the bulk of the per-app revenue estimate above.
Which has better ratings, Gizmo: AI Tutor or Bookshelf? v
Gizmo: AI Tutor edges ahead with ★ 4.8 vs ★ 4.3 (gap of 0.4 stars). Rating volume: Gizmo: AI Tutor 10K ratings, Bookshelf 4K ratings. Higher rating volume = stronger ASO signal even when star averages are close.
How accurate are these Gizmo: AI Tutor vs Bookshelf revenue estimates? v
Directional - typically within 2-3× of actual money earned for popular apps. The $4.6K for Gizmo: AI Tutor and $0 for Bookshelf are derived from App Store grossing rank / Google Play install ranges, scraped IAP tiers, ratings volume and category benchmarks (Education) - net of the 15-30% Apple/Google store cut. Real revenue depends on country mix, retention, refunds and ad fill rate, none of which Apple or Google publish.
How do I compare Gizmo: AI Tutor or Bookshelf to a different App Store app? v
Use the search box at the bottom of this page or paste any two App Store or Google Play links into the homepage tool. We auto-generate a permanent comparison URL with revenue, downloads, IAP tiers, subscription pricing and grossing rank for both apps.