Coming soon · Android

Roam Guard

Protect your travel data plan in real time

Roam Guard monitors per-app mobile usage and warns you before video, backups, or updates drain your eSIM or roaming package.

Per-app live speeds · Smart alerts · Travel profiles · Ultra Saver VPN · Privacy-first

プライバシーポリシー|利用規約|サポート

Built for travelers with limited data

Live dashboard

Today's usage, package remaining, speed, and ETA in one screen.

• Real-time mobile data totals
• Time until package runs out
• Current download/upload speed

Per-app monitor

See exactly which app is using mobile data right now.

• Per-app usage stats
• Smart detections for streaming and backups
• Whitelist essential apps

Smart alerts

Get warned on spikes, backups, streaming, and low package.

• Custom thresholds
• Travel mode profiles
• Foreground monitoring notification

Privacy-first

Usage processed on your phone. No browsing history collected.

• On-device Room database
• Optional CSV export (Pro)
• Local VPN only — no remote server

How to use Roam Guard

Set up in minutes. Alerts run in the background.

Grant usage access

Open Roam Guard and allow usage access. Android requires this to read per-app mobile data.

Set your travel package

Enter your eSIM or roaming package size. Create multiple travel profiles for different trips.

Watch the dashboard

See today's usage, remaining package, live speed, and estimated time until you run out.

Get smart alerts

Receive warnings on spikes, backups, video streaming, and low package — not just end-of-day totals.

Enable Ultra Saver (optional)

Activate the local on-phone VPN to block background apps when every megabyte counts.

Frequently asked questions

Data monitoring, privacy, and Android requirements.

What is Roam Guard?+

An Android app for travelers that monitors per-app mobile data in real time and warns you before your eSIM or roaming package runs out. Package: com.zuki.apps.roamguard.

Does Roam Guard upload my usage to the cloud?+

No. Usage statistics are processed and stored on your device. You may manually export CSV (Pro) and share it yourself.

What is the VPN for?+

Ultra Saver mode uses a local VPN on your phone to block mobile data for apps you have not approved. Traffic is not sent to Roam Guard servers.

Is Roam Guard free?+

Yes. Core monitoring, alerts, travel modes, and one travel profile are free. Roam Guard Pro is an optional one-time upgrade via Google Play.

Does it work on iPhone?+

Roam Guard v1.0.0 is Android only (Android 10 / API 29 or later).

Why does it need Usage Access permission?+

Android requires this special permission for apps to read per-app mobile data usage. Without it, Roam Guard cannot monitor.

Can I monitor two SIMs or an eSIM separately?+

Yes, on dual-SIM Android phones. Choose which line to monitor in the app. Per-line stats may require Phone permission. Some manufacturers report combined data regardless of permission.

What are smart detections?+

Heuristics that label likely usage patterns such as photo backup, video streaming, cloud sync, app updates, and large downloads.

What does Roam Guard Pro include?+

Unlimited travel profiles, unlimited app ignore rules, full usage history, CSV export, home screen widget, Quick Settings tile, premium themes, and full smart insights. One-time purchase — no subscription.

How do I get support?+

Email [email protected] or visit https://zukiapps.com/roamguard/support.

View full support & FAQ