FygoOS vs fnOS: the international edition and the domestic one
"fnOS" and "FygoOS" show up in the same threads, reviews and B站/Twitter comparisons, and the two names keep getting conflated. This is the page that separates them. Facts are from the official channels (fnnas.com and fygonas.com, plus the help portals); where the official story is silent we say so — nothing here is a guess. As of Nov 2026.
What we can verify
| Dimension | fnOS (domestic, 飞牛) | FygoOS (international) |
|---|---|---|
| Operator / entity | Feiniu 飞牛 (fnNAS, 广州铁刃智造技术有限公司 / Guangzhou Tieren Zhizao Technology), via fnnas.com | AXISSTORE TECHNOLOGY PTE. LTD. (Singapore), via fygonas.com |
| Language of record | Chinese-first (English route in progress) | English-first (help.fygonas.com, fygonas.com/en-US) |
| Hardware line | EVO2, EVO4, EVO4 PRO, BASIC4, ME mini (with Beelink) | Same official hardware family, sold through the international channels |
| Licensing on record | Free for personal use; commercial use requires a paid license (per official fnOS materials) | Free (3 users / 4 devices) · Plus $49/yr · Lifetime $199, per fygonas.com pricing, Nov 2026 |
What we can't confirm yet (flagged, not guessed)
- Feature diff. No official side-by-side of what one edition does that the other doesn't. Assume the core OS is shared and the editions differ in language, services and licensing — verify against the specific build you install.
- License / account portability. Whether an fnOS (domestic) license, App Center account or remote-access setup works on FygoOS, and vice versa, is not stated. Per official support.
- Remote-access topology. Both advertise free remote access, but the exact relay/region setup may differ by edition. Per official support.
We deliberately keep the unconfirmed items as a list rather than turning them into facts — the product is new enough that a "per official support" note is more useful than a wrong certainty.
Which one to install
A Western user building a NAS in 2026 installs FygoOS (English UI, international docs, the $49/$199 tiers). A domestic Chinese user uses fnOS (Chinese UI, the fnNAS hardware, the Chinese community and apps). The drives you buy are the same either way — the OS edition does not change the recording-technology rule, which is why the drive guide and the SMR/CMR checker apply to both.
Fair-use note: "fnOS"/"飞牛"/"fnNAS" © their respective owners; "FygoOS" © AXISSTORE; we describe both and link to the official sources, Nov 2026. No partnership implied.