Methods, apparatuses, computer readable media for power save announce frame and opportunistic power save (OPS). An apparatus of a wireless device can include processing circuitry configured to decode a power- save announce control frame (PSACF). The PSACF is received periodically, once during a service period. The PSACF can include information identifying a first plurality of association identifiers (AIDs) of wireless stations (STAs) within the BSS, that are not be addressed or triggered within the service period, and a second plurality' of AIDs of STAs within the BSS, that are addressed or triggered within the service period. The processing circuitry can determine whether an AID of the wireless device is within the first plurality of AIDs. In response to determining the AID of the wireless device is within the first plurality of AIDs, the processing circuitry can activate a power save mode for a remainder of the service period.