Sensor Tower: worldwide iOS and Android app revenue was $39.7B in the first half of 2019, up 15.4% from $34.4B in the first half of 2018
Context & Ripple Effects
This H1 2019 tally is the first checkpoint against Sensor Tower's own March 2019 forecast that App Store spending would reach $96B by 2023 and Google Play $60B — a projection implying roughly 15% annual compounding, which the 15.4% half-year growth rate lands squarely on. It also extends a pattern App Annie had already flagged in mid-2018, when consumer spending grew faster than downloads.
Read forward, the report marks the early phase of an arc that kept steepening: by [[a:967952|H1 2021, global consumer app spending hit a record $64.9B, up 24.8% YoY even as install growth slowed to 1.7%]]. The 2019 numbers are where revenue growth visibly decoupled from user growth.
First-order effects
- Apple and Google's commission bases grow in lockstep with the $5.3B year-over-year increase, since every dollar of the $39.7B flows through their stores' take rates.
- Developers and publishers capture a market where spending is rising 15.4% while download growth lags — App Annie's Q2 2018 data already showed spend (+20%) outpacing downloads (+15%), so revenue per install, not audience size, is becoming the metric that matters.
Second-order effects
- With installs flattening relative to spend, publishers push monetization depth — the subscription shift later visible in the top 100 non-game apps' $18.3B in 2021 consumer spend starts here, as one-off purchases give way to recurring billing.
- Games remain the engine to defend: Sensor Tower's full-year 2019 data put games at 68% of App Store revenue and 84% of Play Store revenue, so any non-game growth directly pressures studios and ad networks competing for the same wallets.
Third-order effects
- If revenue keeps compounding on a flat-ish install base, the stores' cut becomes the single largest lever in the mobile economy — the precondition for the regulatory scrutiny of platform take rates that follows once commissions scale into tens of billions.
- A market growing via monetization rather than new users structurally favors incumbents with large installed bases, tilting indie economics toward acquisition by or dependence on the top publishers.
The trend: The mobile app economy is shifting from install-driven growth to monetization-driven growth, with store commissions scaling into the primary battleground between platforms, developers, and regulators.