Firefox: Private Web Browser vs Robokiller: Spam Call Blocker
Firefox: Private Web Browser
Mozilla
App Store
$1.76M/mo
~$21.11M/yr · 31.4M installs
VS
Robokiller: Spam Call Blocker
Mosaic S.r.l.
App Store
$699.1K/mo
~$8.39M/yr · 62.0M installs
Revenue winner
Firefox: Private Web Browser wins
+152% vs other
Installs winner
Robokiller: Spam Call Blocker wins
+97% vs other
MAU winner
Robokiller: Spam Call Blocker wins
+53% vs other
Rating winner
Firefox: Private Web Browser wins
+3% vs other
Why Firefox: Private Web Browser is winning
Top 2 reasons - backed by the public App Store / Play Store numbers.
- Firefox: Private Web Browser earns roughly 3× more per month than Robokiller: Spam Call Blocker - $1.76M vs $699.1K.
- Premium pricing. Firefox: Private Web Browser charges $10.00/mo vs Robokiller: Spam Call Blocker's $5.99/mo - higher ARPU per converted user.
→ Find more apps with this revenue gap · Full Firefox: Private Web Browser report
Side-by-side metrics
Bars scale to whichever app is bigger on that row. Green = winner.
Firefox: Private Web Browser
vs
Robokiller: Spam Call Blocker
Monthly revenue (est.)?
$1.76M
◀
$699.1K
Annual revenue (est.)
$21.11M
◀
$8.39M
Lifetime installs (est.)
31.4M
▶
62.0M
Monthly active users (est.)?
2.4M
▶
3.6M
App Store rating
4.65★
◀
4.51★
Total ratings
209K
▶
413K
US grossing rank
-
=
-
Cheapest monthly sub
$10.00
◀
$5.99
IAP tiers detected
0 tiers
▶
5 tiers
- Category
- Utilities
- Price
- Free
- Released
- Nov 12, 2015
- Last updated
- May 4, 2026
- File size
- 372.7 MB
- Content rating
- 17+
- Version
- 150.2
- Languages
- AB, AF, SQ, Arabic, AN, HY +80 more
- Category
- Utilities
- Price
- Free
- Released
- Sep 8, 2015
- Last updated
- Apr 29, 2026
- File size
- 193.7 MB
- Content rating
- 4+
- Version
- 24.7.54
- Languages
- English, Italian, Spanish
Firefox: Private Web Browser trajectory
Robokiller: Spam Call Blocker trajectory
FAQ
Which makes more money, Firefox: Private Web Browser or Robokiller: Spam Call Blocker? v
Firefox: Private Web Browser earns about $1.76M per month, while Robokiller: Spam Call Blocker earns about $699.1K. That is a 2.5× revenue gap (~$1.06M more per month for Firefox: Private Web Browser). Annual revenue: Firefox: Private Web Browser ≈ $21.11M/year, Robokiller: Spam Call Blocker ≈ $8.39M/year. Estimates are derived from public App Store signals - grossing rank, scraped IAP tiers, ratings and category benchmarks.
Which has more downloads, Firefox: Private Web Browser or Robokiller: Spam Call Blocker? v
Robokiller: Spam Call Blocker leads with about 62.0M estimated downloads vs 31.4M for Firefox: Private Web Browser - a 2.0× gap. Firefox: Private Web Browser's App Store downloads are estimated from 209K ratings × the standard 1:75 ratio. Robokiller: Spam Call Blocker's App Store downloads are estimated from 413K ratings.
Are Firefox: Private Web Browser and Robokiller: Spam Call Blocker in the same App Store category and competing for the same money? v
Yes - both apps sit in the Utilities 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 Firefox: Private Web Browser and Robokiller: Spam Call Blocker offer? v
Firefox: Private Web Browser: no IAP detected on the public listing. Robokiller: Spam Call Blocker: IAP range 5 tiers detected. Firefox: Private Web Browser runs a "Subscription (~$10.00/mo, security)" monetization model; Robokiller: Spam Call Blocker runs "Subscription (~$5.99/mo)". Scraped tier prices and detected subscription pricing drive the bulk of the per-app revenue estimate above.
Which has better ratings, Firefox: Private Web Browser or Robokiller: Spam Call Blocker? v
Firefox: Private Web Browser edges ahead with ★ 4.6 vs ★ 4.5 (gap of 0.1 stars). Rating volume: Firefox: Private Web Browser 209K ratings, Robokiller: Spam Call Blocker 413K ratings. Higher rating volume = stronger ASO signal even when star averages are close.
How accurate are these Firefox: Private Web Browser vs Robokiller: Spam Call Blocker revenue estimates? v
Directional - typically within 2-3× of actual money earned for popular apps. The $1.76M for Firefox: Private Web Browser and $699.1K for Robokiller: Spam Call Blocker are derived from App Store grossing rank, scraped IAP tiers, ratings volume and category benchmarks (Utilities) - 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 Firefox: Private Web Browser or Robokiller: Spam Call Blocker to a different App Store app? v
Use the search box at the bottom of this page or paste any two App Store 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.