App Overlap — GTA & Fortnite × Roblox

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Overview Company Previews App Overlap

Overlap runs both ways — and it is wildly asymmetric

Share of this app's users who also use Roblox
scale 0–%
App
Share of Roblox users who also use this app
scale 0–% · note the different scale

Why so lopsided — US audience size (avg MAU, log scale)

A big share of a small app is a tiny share of a big one. The two columns above are the same intersection divided by two very different denominators.

Affinity — likelihood vs the US general population

Sensor Tower's symmetric lift: P(A∩B) ÷ P(A)P(B). 1.0× = independent.
This is the direction-free way to read the same relationship — it is identical whichever app you make the base, and we verified that on every pair Sensor Tower reports both ways.

Change vs the prior 12 months — share of each app's users who also use Roblox

Same window one year earlier, straight from the API's previous-period field.

Scale check — every GTA mobile title, peak-ever vs now

These MAU figures are on a different basis from the overlap section above — they will not tie. Above is a 12-month average, US only (the window the overlap report covers); here it is a single month, region-switchable. Fortnite for example averages 2.26M US over the year but ran 3.10M in Jun-2026 alone, and 14.4M worldwide.
Sensor Tower's usage panel starts Aug 2015, so the 2010–2013 GTA launches predate it — rows marked pre-panel peak in the very first month on record and their true launch peak is unmeasurable. LCS (Dec 2015) and the Definitive trilogy (Dec 2023) launched inside the panel and are fully captured.
Monthly MAU, log scale. Roblox's all-time peak is right now; GTA mobile's was Dec 2023, the Definitive-trilogy launch month.
Peak-ever vs Jun-2026 per title (log scale).
TitleReleasedPeak MAUPeak month Jun-2026vs peakStore model today

All figures

US · · Sensor Tower unified (iOS + Android) app records.
AppAvg US MAU→ Robloxprior yr Roblox →prior yrAffinityPanel penetration Reverse method