iOS App Store

Launched July 2008. Revenue share 70/30 (15% after year one since 2016). Curation: pre-publish review. Platform: iOS-only, Apple hardware. Trust: strict identity verification and app review. Strengths: enormous installed base, strong trust layer, streamlined discovery. Trade-offs: platform gatekeeping, periodic policy changes that hurt developers, single-vendor hardware.

Google Play Store

Similar economics to iOS (70/30 baseline, reduced for longer subscriptions) with looser curation and more open developer access. Better for developers than iOS in edge cases (alternative stores allowed on Android). Worse trust baseline — Android malware via Play is higher-volume than iOS App Store.

Unity Asset Store

Launched 2010. Revenue share 70/30 (sometimes higher for promoted assets). Curation: pre-publish review with a focus on technical standards. Platform: Unity-integrated. Buyer is typically another developer, not an end user. This is a B2B marketplace. Strength: made game-asset reuse an industry norm. Trade-off: the platform’s financial turbulence (pricing changes, policy shifts) has hurt creator confidence repeatedly.

Unreal Marketplace (now Fab)

Epic shipped Unreal Marketplace with Unreal Engine; consolidated in 2024 as Fab to unify 3D assets across engines. Revenue share 88/12 — deliberately more generous than Unity, a positioning move. Trust infrastructure lighter than the iOS App Store, heavier than Roblox.

Roblox Workshop

Started 2006; creator economy scaled through the 2010s. Revenue share is famously complex — Roblox converts real money to Robux, then Robux back to cash with significant haircuts, so the headline percentage numbers understate what Roblox captures. Platform strength: lowering the barrier to publish to near-zero; the long tail of creators is huge. Trade-off: creator economics that favour Roblox rather than creators for anything but the top 1%.

Steam Workshop

Valve’s user-generated-content marketplace inside Steam. Revenue share varies by game and publisher; the platform has produced meaningful creator income for some titles (e.g. mods for specific games) but is not a coherent unified marketplace in the way the App Store is.

Where GeraSkills borrows

70/30 as the baseline (and 80/20 for the first 500 founding creators) — App Store pattern.
Pre-publish safety review — App Store pattern, extended for robot safety.
B2B layer — Unity pattern. Capability packs that other skill developers depend on should be first-class.
Low barrier for hobbyists — Roblox pattern, adapted for robots (so: still low barrier, but with non-optional safety review).

Where GeraSkills diverges

Physical-world safety is first-class. Skills act in the real world. The review process is closer to medical-device standards than to App Store guidelines for anything that operates near humans.
Hardware fragmentation is real. Skills declare compatibility per-robot and per-firmware. Discovery filters accordingly.
No walled garden. Robots from multiple vendors are first-class. We do not want Apple’s hardware-lockout dynamic.
Versioned behaviour, explicit updates. Unlike iOS apps that silently update, skill updates require user confirmation because the skill runs physically.

Feature matrix

Feature	iOS App Store	Unity Asset Store	Roblox Workshop	GeraSkills
Baseline rev-share	70/30 (85/15 y2+)	70/30	Effective ~25/75	70/30 (80/20 founding)
Pre-publish review	Yes	Yes (lighter)	Automated	Yes, safety-focused
Single hardware vendor	Yes	N/A	N/A	No
Physical-world stakes	No	No	No	Yes
Consumer + B2B	Consumer	B2B	Consumer	Both
Explicit update consent	No	Yes	No	Yes

Why these choices

The 70/30 with an 80/20 founding tier balances platform costs against creator motivation. Safety-first review is non-optional because skills act on the world. Multi-vendor hardware support is non-negotiable because the robot ecosystem is already multi- vendor and will stay that way.

GeraSkills vs. Unity Asset Store vs. iOS App Store vs. Roblox Workshop