# Push and memory warnings (/docs/e2e/conditions/events)



Two one-off events rather than states: nothing is held on the device afterwards.

```ts
await device.push({ aps: { alert: { title: "Order shipped" } } });
await device.memoryWarning();
```

| Member                         | iOS simulator                                                                | Android emulator                                          |
| ------------------------------ | ---------------------------------------------------------------------------- | --------------------------------------------------------- |
| `push(payload, { bundleId? })` | delivers the payload to the app (`simctl push`, needs `aps`, 4096 bytes max) | `E_UNSUPPORTED`                                           |
| `memoryWarning({ bundleId? })` | `E_UNSUPPORTED`: the `lowmemory` notification never reaches a UIKit app      | `am send-trim-memory RUNNING_CRITICAL` to the running app |

By hand with `warden ui push` and `warden ui memory-warning`: [Push and memory warnings on a simulator](/docs/sims/conditions/events).