# Smart Time Guard

> Set screen-time limits on a child’s Android device over the same Wi-Fi.

Canonical page: [https://chrome-stats.com/d/com.tnojc.ctl](https://chrome-stats.com/d/com.tnojc.ctl)

## Overview

- **ID:** `com.tnojc.ctl`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** TNOJC
- **Category:** TOOLS
- **Version:** 5.0
- **Last updated:** 2026-08-26
- **First published:** 2026-08-17
- **Publisher country:** KR
- **Size:** 15 MB
- **Data as of:** 2026-09-07
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.tnojc.ctl)
- **Privacy policy:** [https://gist.github.com/woosuk0410/bc9aec2c0f0829801373f23949a6fc61](https://gist.github.com/woosuk0410/bc9aec2c0f0829801373f23949a6fc61)

## Description

Smart Time Guard helps families manage device time across two Android devices connected to the same Wi-Fi network.<br><br>HOW IT WORKS<br>1. Install Smart Time Guard on both devices.<br>2. Choose Parent Mode on the parent device and Child Mode on the child device.<br>3. Grant the requested permissions on the child device.<br>4. Enter a duration in minutes on the parent device and send the restriction command.<br>5. The child device receives countdown warnings and locks when time expires.<br><br>KEY FEATURES<br>• Simple minute-based time limits<br>• Direct communication over the same local Wi-Fi network<br>• Countdown warnings before the limit ends<br>• Automatic screen locking at the scheduled time<br>• Free version includes up to 10 commands<br>• Optional paid upgrade for unlimited commands<br>• No account required for local control<br><br>REQUIRED PERMISSIONS<br>Child Mode needs Device Administrator permission to lock the screen, exact alarm access to trigger limits on time, display-over-other-apps permission to show warnings, and a foreground service to listen for commands. These permissions are used only for the app’s core time-management features and can be revoked in Android Settings.<br><br>IMPORTANT<br>Both devices must be connected to the same Wi-Fi network when sending a command. Smart Time Guard is designed for parent- or guardian-managed devices.<br><br>Smart Time Guard uses Android’s standard screen lock. For effective use, the child should not know the device PIN, password, or pattern. A child who knows the unlock credential can unlock the device and continue using it.

## Rankings

- #3,198,643 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_LOCAL_NETWORK`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.ACCESS_WIFI_STATE`
- `android.permission.CHANGE_NETWORK_STATE`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.FOREGROUND_SERVICE_CONNECTED_DEVICE`
- `android.permission.INTERNET`
- `android.permission.RECEIVE_BOOT_COMPLETED`
- `android.permission.SCHEDULE_EXACT_ALARM`
- `android.permission.SYSTEM_ALERT_WINDOW`
- `com.android.vending.BILLING`
- `com.android.vending.CHECK_LICENSE`
- `com.tnojc.ctl.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.tnojc.ctl)