Short answer: Amoo is a personal AI agent. StepFun's personal AI agent built into Step AOS 1.0, the operating system of its STEPX Neo phone: tell the phone what you want and Amoo carries out the steps across apps and services.
Amoo
Key facts
| Website | https://www.stepx.com/ |
|---|---|
| Vendor | StepFun (STEPX device brand) |
| Channels / category | Built into the STEPX Neo smartphone (Step AOS 1.0); sold in China via JD.com, Tmall and Douyin |
| Pricing / availability | Comes with the STEPX Neo phone: early-access edition 3,999 yuan in China (phone, Step models, Step AOS and Step Studio), including a 12-month STEPX Token Plan. Cost after the first year not announced; availability outside China not announced |
| Launched | 2026-10-13 |
| Funding (reported) | StepFun raised USD 2.5 billion in a pre-IPO round in May 2026 (Caixin); backed by Tencent (Decrypt) |
| Channels confirmed | Mobile app |
| From the site (verbatim) | “STEPX智能体时代的先行者，打造大模型原生智能体手机STEPX Neo” |
| Sources | [1] [2] [3] [4] [5] |
| Last checked | 2026-11-11 |
What can Amoo do?
- STEPX Neo with Amoo launched 13 Oct 2026 at StepFun's 'Ready Builder One' event in Shanghai; pre-orders from 21:00 that day, sales from 16 Oct at 10:13 source
- Early-access edition priced 3,999 yuan as a 'full-stack' bundle: phone, Step models, Step AOS operating system and Step Studio developer tool source
- Buyers get a 12-month STEPX Token Plan (10 billion tokens a month per Chinese launch coverage); StepFun has not said what AI costs after the first year source
- Step AOS 1.0 was built for the agent, with long-term memory, task scheduling and security in the base layer, breaking phone functions into blocks the agent calls via MCP source
- Two memories: one for the user's facts, habits and preferences, one for what Amoo learns about doing tasks; you can view task steps and manage permissions and memory source
- Simple commands run on a small on-device model, some offline; complex multi-app requests go to a larger cloud model source
- Nearly 100 partners including Alipay, Tencent, Ctrip, Didi, Meituan, Amap and CapCut; payments and bookings are completed on the partners' own platforms source
- A rear MiniLED dot-matrix screen shows what Amoo is doing; six-microphone array for voice source
- First unveiled 13 Jul 2026 in Shanghai with the STEPX brand and Step AOS; StepFun was founded in 2023 by former Microsoft vice president Jiang Daxin source
Frequently asked questions
What is Amoo?
StepFun's personal AI agent built into Step AOS 1.0, the operating system of its STEPX Neo phone: tell the phone what you want and Amoo carries out the steps across apps and services.
How much does Amoo cost?
Comes with the STEPX Neo phone: early-access edition 3,999 yuan in China (phone, Step models, Step AOS and Step Studio), including a 12-month STEPX Token Plan. Cost after the first year not announced; availability outside China not announced
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