# Base

**URL:** https://heroiclabs.com/docs/hiro/typescript/base/
**Keywords:** base, hiro
**Categories:** hiro, typescript, base

---


# Base

Read more about the Base system in Hiro [here](../../concepts/base/).

## Rate app
Send feedback to the game's developers over email.

```typescript
const request = new RateAppRequest();
request.score = 9;
request.message = "It's a great game, love it!";

await HiroClient.baseRateApp(session, request);
```

## Set device prefs

Update or create the mobile push device tokens and preferences for the player.

```typescript
const request = new DevicePrefsRequest();
request.device_id = "device_id";
request.push_token_android = "android_push_token";
request.push_token_ios = "ios_push_token";
request.preferences = {
    "dark_mode": true
};

await hiroClient.baseSetDevicePrefs(session, request);
```