Huawei says HarmonyOS is getting so lean that it should eventually run on just 64 KB of RAM, a level of frugality that makes modern phone software look bloated by comparison. At Huawei Developer Conference 2026, the company said the system already works on devices with 128 KB of memory, and the next target is even lower.
That is not a party trick. It is Huawei quietly building an operating system that can live in tiny connected gadgets, where every byte matters and battery life is the whole game. For Apple and Google, whose mainstream platforms demand vastly more memory, this is a reminder that software bloat is often a choice, not a law of nature.
HarmonyOS memory requirements
Huawei consumer chief Yu Chengdong said the platform can already run with 128 KB of RAM. The company’s engineers are still optimizing, with 64 KB now set as the next milestone.
For comparison, even pared-back Android Go still asks for several gigabytes of RAM, while Windows 95 needed at least 4 MB. HarmonyOS is chasing a completely different class of device, and that is the point.
IoT devices for HarmonyOS
The obvious target is IoT hardware: sensors, wearables, smart-home kit, and other devices that need to sip power rather than guzzle it. Huawei also said some HarmonyOS devices could run for a full year on a single battery or charge in certain scenarios, which sounds less like a phone operating system and more like a platform for the stuff people forget is even on the network.
- Current target: 128 KB of RAM
- Future target: 64 KB of RAM
- Best fit: IoT, wearables, smart home, sensors
- Power claim: up to one year in some scenarios
Huawei’s plan after Android restrictions
The software push also fits Huawei’s long-running effort to build a self-contained ecosystem after US restrictions cut it off from full Android access and several American technologies. That pressure has forced the company to treat efficiency as a strategy, not just an engineering metric, and it may be one of the few ways to win in devices too small for the usual smartphone arms race.
If Huawei can keep shrinking HarmonyOS without losing stability, rivals will have to take the low end seriously again. The next question is whether those 64 KB ambitions stay in the lab, or start showing up in products people can actually buy.