import type { AppUsageRecord, DailyUsageReport } from './types';
export type { AppUsageRecord, DailyUsageReport, UsageStatsErrorCode } from './types';
/**
 * Opens the system Usage Access settings screen (Android only).
 * On iOS this rejects with E_NOT_SUPPORTED.
 */
export declare function openUsageAccessSettings(): Promise<void>;
/**
 * Checks whether the app has Usage Stats permission (Android).
 * On iOS this always resolves `false`.
 */
export declare function hasUsageAccess(): Promise<boolean>;
/**
 * Returns foreground usage data for the specified package names over the last N days.
 *
 * @param packageNames - Array of Android package names to query.
 * @param days - Number of days to look back (including today).
 * @returns Array of per-app, per-day usage records.
 */
export declare function getUsageByApps(packageNames: string[], days: number): Promise<AppUsageRecord[]>;
/**
 * Returns foreground usage data for ALL apps over the last N days.
 *
 * @param days - Number of days to look back (including today).
 * @returns Array of daily reports, each containing all apps' usage.
 */
export declare function getUsageAllApps(days: number): Promise<DailyUsageReport[]>;
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