Choosing an Android VPN is about more than its speed right after connecting. Check whether it stays connected with the screen locked, how much battery it uses during everyday tasks, and whether you can route only selected apps through a proxy. Compare background reliability, battery use, and per-app proxy settings together to find a setup that suits your device.
This hands-on comparison uses a repeatable device-testing process. It does not present unrecorded brand benchmarks or generalize results from one device to every Android model. System customizations, battery condition, mobile signal, and client version can all affect results. Keep the test conditions consistent, then change settings one at a time; this is more reliable than copying supposed battery-saving settings.
What to look for in an Android VPN app
Android VPN clients typically use the system VPN interface to handle traffic, then forward it according to their rules. A VPN icon in the system tray shows that a tunnel interface has been established; it does not confirm that the remote route, DNS resolution, or every app request is working properly. When choosing a client, check connection recovery, background operation, traffic routing, and diagnostic tools.
| Feature | What to look for | How to test it |
|---|---|---|
| Background reliability | Connection status notifications and background operation guidance | Lock the screen and check whether the connection and app requests recover |
| Network changes | Automatic reconnection, status details, or error logs | Switch between Wi-Fi and mobile data, then observe new requests |
| Per-app proxy | Clear include or exclude modes | Check the egress route for selected and unselected apps separately |
| DNS resolution | Documented DNS and routing behavior | Use DNS tests, logs, and real-world access checks together |
| Subscription management | Compatible subscription formats and visible update results | After importing, check nodes, rules, and update notices |
A service-specific client can make account and route management easier, while a general-purpose client may offer more detailed rule settings. Neither has a guaranteed battery-efficiency advantage. First confirm which client the service supports and what subscription format it uses, then decide whether you need additional configuration options.
Disconnects when the screen locks: check background limits first
Android's standby behavior can restrict background activity, and some manufacturers add their own controls for auto-start, background processes, or battery use. Even a VPN client that uses a foreground service is not guaranteed to stay active in every environment. If it works with the screen on but fails when locked, check the client process and connection status before switching routes.
- Confirm that the client connects normally. Keep the screen on, open the target app, and send a new request. If it already fails, check the subscription, route, and rules first.
- Find the app's battery settings. Open the client's app details in system settings and look for options such as “Allow background activity” or “Unrestricted.” Names vary by manufacturer; change settings for that client only.
- Check the manufacturer's background controls. If the system has a separate auto-start or background-protection setting, configure it according to the client's official guidance. Locking the app in the recent-apps view is not a substitute for battery settings.
- Review runtime notices. Check whether the client has enabled the services needed to keep running and whether system notification settings affect its status notices. Do not use notification visibility alone to determine whether the process is still running.
- Repeat the screen-lock test. Record the client's status, connection errors, and target app behavior before and after locking the screen. Check whether the change follows the setting you just adjusted.
Some systems offer “Always-on VPN” and “Block connections without VPN.” Availability depends on the system and client. The first keeps the VPN active; the second restricts network access when the tunnel is unavailable. If you enable it and the route disconnects, apps being unable to connect may be expected behavior, not a device fault.
Comparing battery use: keep test conditions consistent
Battery use can come from encryption, background wake-ups, data transfer, and wireless communications. A weak signal, repeated reconnections, or continuous video playback may affect battery life more than the client interface itself. A single idle test and a large-file transfer are not enough to determine which client uses less power.
On the same device, use the same network, screen state, and similar activity. Compare VPN off, VPN on while idle, and VPN on while using the target app. Keep each test period the same, and record signal strength, heat, data transferred, and reconnections. Battery indicators round their readings, so short-term differences are only clues.
- ✅ Change one variable per test: client, route, or routing mode. Do not change every condition at once.
- ✅ Check system battery statistics and target app activity so you do not attribute all video playback power use to the VPN.
- ✅ Check for frequent route probes, repeated speed tests, or failed reconnections before adjusting related settings.
- ❌ Do not treat a brief reduction in power use after clearing background apps as a reliable long-term connection strategy.
- ❌ Do not disable certificate checks, encryption, or other connection validation just to save battery.
If a route fails often, switching to a more stable one may help more than repeatedly changing background permissions. If the device gets noticeably warmer only on mobile data, compare signal strength and network switching as well. A battery-optimization exemption addresses background restrictions; it does not guarantee lower power use and may keep the client active longer.
Per-app proxy: understand include and exclude modes
Per-app proxy settings determine which apps enter the VPN tunnel. Include mode usually sends only selected apps through the tunnel; exclude mode usually lets selected apps bypass it. Follow the client documentation, as behavior can vary. After saving, you may need to reconnect and restart the target app so new connections use the updated rules.
This is a different layer from “rule mode” or “global mode.” Per-app settings determine whether an app's traffic enters the tunnel; the latter settings often determine how requests that enter the client are routed. So even if you select a browser, some domains may still connect directly according to the rules. Switching to global mode may not take over apps that have been excluded.
- Define the goal, such as routing only international research apps through the proxy while leaving other everyday apps on their usual network.
- Choose include or exclude mode and check what the list means to avoid selecting the opposite of what you intend.
- Reconnect the VPN, close and reopen the target app, then send a new request.
- Check the target app and a comparison app separately; a browser test does not represent every other app.
In-app login pages, external browsers, and system components may use different processes or app identifiers. If the main page opens but login fails, check which component handles the redirect rather than immediately adding every app to the proxy. Per-app proxy settings do not automatically prevent background activity. They reduce unnecessary proxy traffic; they are not a universal battery-saving switch.
Protocols and routes: names alone do not tell the whole story
Shadowsocks, VMess, Trojan, VLESS, Hysteria2, and TUIC are different proxy protocols or protocol families. Client compatibility and subscription formats are not always the same. Do not assume configurations are interchangeable just because both clients support “Import subscription.” A configuration that imports on Android may not work unchanged in a desktop client.
Hysteria2 and TUIC, which are based on QUIC, depend on UDP network conditions and may behave unpredictably when a network restricts UDP. Other protocols are also affected by transport methods, TLS settings, and server implementations. VLESS does not provide traffic encryption by itself; consider the secure transport configured alongside it. A protocol label alone cannot establish privacy protection or battery use.
IEPL dedicated routes, relays, and direct connections describe network paths or access methods, not the proxy protocols above. A dedicated route or relay may improve some paths, but the exit point, local network, and destination service still affect performance. Route type does not guarantee that a connection will stay active with the screen locked. Choose based on recovery and sustained access in your own usage scenarios.
How to test DNS and network changes
Checking your egress after connecting is only a starting point. Use My IP to check the browser's current egress, then test the target app. If the client supports per-app or domain-based routing, a browser and another app may show different egress routes without indicating a fault. Compare the results with the rules you intended to apply.
DNS checks focus on whether resolution requests follow the expected path. System Private DNS, browser Secure DNS, client-side resolution, and routing rules may all affect the result. The resolver location shown by a test page does not prove the path taken by a real request, and using a public resolver does not by itself indicate a leak. Check the client documentation and logs, and repeat the tests.
Then test recovery after locking the screen, switching between Wi-Fi and mobile data, and reopening the target app. Existing long-lived connections may break after a network change. Even when the VPN recovers, an app may not restore its old session automatically. Sending a new request helps distinguish a tunnel issue from an app reconnection issue.
When troubleshooting, note whether “the client is still running but requests fail,” “the client has exited,” or “only one app fails.” These details are more useful than simply reporting a disconnection. For installation and import steps, see Quick Start. Avoid modified configurations from unknown sources as a shortcut.
Android VPN recommendations by use case
For everyday browsing, prioritize simple operation and automatic recovery. For extended background use, test screen-lock and network-switch recovery. If only selected apps should use the proxy, first confirm include, exclude, and DNS behavior. Do not sacrifice real-world stability on your device for a longer protocol name or a higher momentary speed-test result.
When choosing a service, assess network performance separately from plan terms. I6VPN supports unlimited devices and covers 100+ countries with 190+ routes. These options provide flexibility but do not mean every route performs identically on every network. No email address is required to create an account; use a username and password.
For occasional use, compare data packages that never expire; for regular use, compare monthly subscriptions. Monthly subscription data resets each month on the activation date, not on a fixed calendar-month schedule. The refund terms allow a full refund for any reason within 60 days of the first payment. Before choosing a plan, test it with your Android device and the apps you use most, following the steps in this guide.