Sensor Tower: iMessage App Store has 5K apps six months after launch, with games topping category list at 25.9%, but dev interest is waning
When the iMessage App Store first launched, it was touted as the next big platform for apps - a new way for developers to gain users and make money …
Context & Ripple Effects
When Apple opened the iMessage App Store in September 2016, it was pitched as a fresh distribution surface for developers — stickers, games, and mini-apps living inside Messages. Six months in, Sensor Tower's count of roughly 5,000 apps with games leading categories at 25.9% reads less like a breakout platform and more like a slow start.
The telling signal is the trajectory, not the total: developer interest is already waning before the store's first anniversary, which matters because Apple was positioning messaging as its next app economy.
First-order effects
- Developers who invested in iMessage apps face a shrinking addressable audience inside Messages, since declining new submissions mean less catalog growth, weaker discovery, and thinner monetization for early entrants.
- Apple's 'next big platform' narrative takes a direct hit: the company now has public Sensor Tower data showing its newest storefront failing to sustain momentum half a year after launch.
Second-order effects
- Developers weighing where to spend effort will default back to the main App Store, reinforcing the incumbent storefront's gravity and making future Apple side-platforms harder to seed.
- Apple's own follow-on surface shows the same shape: Sensor Tower later found games topping ARKit-powered apps at 35%, suggesting new Apple categories reliably fill with games first regardless of the platform's intended purpose.
Third-order effects
- If the pattern holds across iMessage and ARKit, Apple's platform extensions succeed or stall on sustained developer economics rather than launch hype — a structural constraint on how many parallel app stores the ecosystem can support.
- The long-run counterpoint arrives with Sensor Tower's finding that main-App Store submissions doubled to ~560K in H1 2026 as vibecoded apps flooded in: supply can explode without developer conviction, so raw app counts become an unreliable proxy for platform health.
The trend: Apple's bolt-on app surfaces — iMessage, then ARKit — keep repeating a lifecycle of games-dominated launches followed by fading developer commitment, testing whether side-platforms can ever sustain independent app economies.