Choosing an Android VPN takes more than checking whether the connect button changes color. Background activity, battery settings and per-app routing determine whether access continues after the screen locks, which apps use international routes, and how quickly you can identify a problem. Test these behaviors before comparing plans and routes.
This hands-on comparison uses checks you can repeat on your own device. It does not offer unmeasured speed rankings or assume that results from one device apply to every Android system. Manufacturer settings, client implementations and network conditions vary. The checks below distinguish expected behavior from possible faults so you can record what actually happens.
Choosing an Android VPN: Compare Connection Behavior First
Android proxy clients commonly use Android's VpnService to create a local virtual network interface, then route traffic directly or through a proxy server according to the configuration. Seeing the system VPN indicator only means that the interface has been established. It does not confirm that a particular app uses the intended exit or that every domain is reachable.
First confirm that the client supports the service's subscription format and protocols. Then check whether background operation, per-app selection and logs are easy to manage. Shadowsocks, VMess, Trojan, VLESS, Hysteria2 and TUIC are not supported by every client. Even when a protocol name matches, specific transport options and subscription formats may not be compatible. Do not assume that a subscription can be imported just because a client says it supports subscriptions.
| Scenario | Behavior to check | What to check first if it fails |
|---|---|---|
| Access with screen on | Complete the intended action on the target website and in the target app | Subscription validity, node and routing rules |
| Resume after locking the screen | After unlocking, the app can connect or the client reconnects normally | Battery restrictions, background data and process status |
| Network switching | The connection can be re-established after switching between Wi-Fi and mobile data | Expired session, reconnect settings and network authentication |
| Per-app routing | Selected and unselected apps follow their expected routes | Include or exclude mode, app identity and overlapping rules |
| Battery saver | Record whether access is interrupted and under what conditions | System battery policy and background activity restrictions |
Importing a Subscription and Granting System Access: Establish a Verifiable Connection
Get the client and subscription details from the service's user panel. Avoid using unknown installation files or configurations as the starting point for troubleshooting. With U8VPN, Android users can access the relevant information in the panel after signing in to the client. For installation or import instructions, see the client setup guide. Subscription URLs often contain account credentials, so protect them like passwords.
- Check compatibility. Review the formats, protocols and operating modes supported by your client. If the imported list is empty or you see an “unsupported” message, check the format first rather than repeatedly changing system permissions.
- Import and update the subscription. Use the option provided in the panel and wait for the client to finish parsing it. A successful import does not guarantee a successful connection; check that nodes are selectable and that subscription updates complete without errors.
- Allow the system to establish the VPN connection. Confirm that the app name in the system prompt matches the client you are using. Firewalls or filtering tools that also use a local VPN may compete for the system interface, so avoid enabling them at the same time while testing.
- Verify actual access. Select a route, open the target website, then check the exit on the IP check page. In rule-based mode, the check page itself may connect directly, so interpret the result alongside the routing rules.
Disconnects After Screen Lock: Separate Background Restrictions from Route Failures
Loss of access after locking the screen does not necessarily mean the route has failed. Android's power-saving mechanisms may delay background network activity, and manufacturer-specific systems may impose additional process restrictions. Another possibility is that the client is still running but a network change has invalidated the existing connection. First check whether the client is still active and can reconnect; then decide whether to change a system setting or try another route.
Check Background Permissions in App Details
Open the client's app details in system settings and look for “Battery,” “App battery management” or a similar option. If settings such as “Allow background activity” or “Unrestricted” are available, try relaxing the restriction for the client alone. Some systems also offer auto-start, linked start or task locking. Names and effects vary by system, and a lock icon in the recent-apps list is not a universally reliable way to keep a process alive.
Also check background data permissions and data-saver settings. Allowing background operation while blocking background network access can still cause subscription updates or connection recovery to fail after the screen locks. Persistent notifications can help show the foreground service status, but their visibility also depends on notification permissions. A missing notification alone does not prove that the process has stopped.
Reproduce the Issue Under the Same Conditions
Keep the client, node, target app and network unchanged. First complete an action with the screen on, then lock the screen, unlock it and repeat the same action. Record whether the client is still running, whether the system VPN indicator is visible and whether the target app needs to be reopened. Then change only the client's battery restriction and repeat the comparison. Changing one condition at a time helps show what made the difference.
If the client still shows a connection but all proxy requests fail, disconnect and reconnect. If reconnecting restores access, investigate network switching and automatic reconnect behavior. If only one app fails, check routing, DNS or that app's regional restrictions rather than continuing to relax all background permissions.
Battery Use and Background Activity: Compare the Real Cost of Changes
A background connection requires system and network activity, so it cannot be guaranteed to remain active without using additional power. Battery use also depends on signal quality, screen time, target apps, retry frequency and transport. Seeing the client near the top of the system battery list does not mean all the reported use comes from the client itself; the system may include network activity routed through it in related statistics.
Compare under similar network and usage conditions. Do not rank a background test on an unstable mobile signal against brief browsing on stable Wi-Fi. Keep the default configuration as a baseline, then observe what changes after adjusting background permissions. Unless troubleshooting requires it, avoid leaving verbose logging, frequent automatic speed tests or aggressive scheduled checks running continuously.
Hysteria2 and TUIC use QUIC-based transport, and network restrictions on UDP may affect how they perform. This does not prove that one protocol is always more battery-efficient or more stable. Test the protocol, client implementation and current network together. Before switching protocols, confirm that the service actually provides the corresponding configuration.
Per-App Routing: Send Selected Apps Through International Routes
Per-app selection and domain-based routing operate at different levels. The first determines which apps send traffic into the client's VPN interface; the second determines how that traffic is handled according to domains, addresses and other rules. Selecting an app does not mean every request it makes will use the proxy. If an internal rule matches direct access, the request may still connect directly.
Common modes include “Proxy selected apps only” and “Bypass selected apps.” Both may show an app list, but the meaning of a checked box is opposite. Some clients call these include and exclude modes. Read the instructions before configuring them, and confirm whether unselected apps connect directly, are blocked or follow another setting.
- ✅ First confirm whether the list is in “include” or “exclude” mode; do not infer the mode from checkmarks alone.
- ✅ Test with an actual action in the target app, such as refreshing content or making a new request, rather than checking only the browser's exit.
- ✅ After changing the app list, reconnect as prompted by the client and close and reopen the target app to avoid interference from existing connections.
- ✅ Work profiles, app clones and the main profile may use different app identities; check each environment separately.
- ❌ Do not assume that embedded web pages, external browsers and download services use the same app's traffic. Other components may handle them.
For mainland China banking apps, local network devices or apps that need local network access, configure exclusions as needed and verify that the features still work. Android's “Always-on VPN” and “Block connections without VPN” options can affect whether excluded traffic is available. In particular, an excluded app may not be able to connect directly when blocking is enabled. Check the system and client settings rather than treating a failed exclusion as a node problem.
DNS and Route Troubleshooting: Verify the Path Even After Connecting
DNS resolves domain names to network addresses. A DNS leak usually means that queries expected to follow a particular tunnel or resolution policy are sent over a different route. Seeing a resolver listed on a test website is not enough to conclude that there is a leak. First establish whether you want all traffic proxied or rule-based direct access, and understand how the client handles DNS.
Android Private DNS, encrypted DNS in the browser and the client's own resolver may all be involved. When troubleshooting, record the original settings and check them one at a time against the client documentation. Changing them all at once makes it difficult to identify the cause. A browser test shows only that browser's behavior; it cannot verify other apps, IPv6 routing or background traffic.
If only one domain fails, check the routing log for direct or proxy decisions, DNS errors and connection errors. If every destination fails, check whether the current network requires web authentication, whether the subscription is valid and whether the node can establish a connection. A correct exit region does not guarantee that a platform will make content available; it may also consider account region and its own access rules.
Route labels are not a substitute for verification. Direct connection usually means the client connects directly to the service entry point; a relay usually adds a forwarding hop. IEPL refers to a dedicated Ethernet line and may be used for part of a provider's network. These labels do not automatically describe the full path, nor do they predict peak-hour speeds. Compare routes using the same target app under similar conditions.
Android VPNPicks: Conclusions and Plan Selection
If your main issue is disconnection after the screen locks, prioritize a client that makes its background status clear, supports the reconnect settings you need and has readable logs. If you want only selected apps to use international routes, first check that its per-app mode, domain rules and system blocking settings work together for your needs. Subscription import is only the starting point; a client is suitable for long-term use when you can reproduce and explain its connection behavior.
Conclusion: Test access with the screen on, recovery after locking, network switching and per-app routing before choosing a client and route combination. If one test fails, keep the other conditions unchanged and adjust only the relevant setting. Without measurements, do not rank protocols or nodes by their names.
Choose a plan based on your actual usage. U8VPN monthly subscriptions include ¥9.9/month for 60GB, ¥18/month for 250GB and ¥28/month for 500GB; data resets monthly on the activation date. For occasional use, compare data packages: ¥158/300GB, ¥358/1000GB and ¥658/3000GB. They remain valid until used and never expire. Video quality, file downloads and app updates all affect usage, so estimating only by the number of apps may not be reliable.
U8VPN supports Android, Windows, macOS, iOS and Linux, with unlimited simultaneous devices. No email address is required; start with a username and password, and 7-day refunds are available for any reason. Confirm how the client handles background activity, routing and DNS on your own device using the steps in this guide. For help, visit the help page. Providing steps that reproduce the issue makes it easier to investigate than simply reporting an “unstable connection.”