AppSync: Manage App Updates & Maintenance Mode

The Problem

Your update flow is stuck in 2015

Most teams hardcode minimum versions, include version checks in app releases, and have no maintenance mode at all. The result: every rule change requires a new release, every backend deployment risks breaking the user experience, and iOS and Android run inconsistent logic.

Every version rule requires a new release

Changing a minimum supported version means touching code, opening a PR, building, and shipping. AppSync moves the rule to a dashboard so you can toggle it without a single commit.

Backend downtime breaks the app

When your servers go down, users encounter cryptic errors, and one-star reviews follow. AppSync shows a branded maintenance screen at app launch, which you can turn off when you're ready to resume.

iOS and Android speak different languages

Native update APIs differ between platforms. AppSync gives you one rule engine, one configuration, and one experience consistent across iOS, Android, Flutter, and React Native.

What is AppSync?

AppSync is a powerful mobile app update and maintenance management tool that gives you full control over how and when users are prompted to update their apps without the need for hardcoded logic.

Three Built-in Modes

Force, optional, or maintenance pick the right one per release

Configure each mode per platform and switch between them from the dashboard. AppSync runs at app launch and routes users to the appropriate popup or screen based on the rules you’ve set.

Force update

Critical Update

Users on a version below your minimum see an update popup at app launch with no cancel option. Tapping Update redirects them to the App Store, Play Store, or your AppsOnAir link.

Bypasses standard UI

Mandatory compliance

Prevents old app usage

Optional update

Gentle Nudge

The same popup, but with a Cancel button. Users can tap Update to go to the store, or Cancel to dismiss it and continue using the current version.

Improves adoption rate

User-friendly flow

Customizable frequency

Maintenance

Downtime Mode

Replace the app at launch with a custom screen during the downtime. Configure the image, title, message, and colors from the dashboard. Toggle it on and off; no release required.

Global scope

Customizable ETA text

Prevents broken states

Automate Your App Lifecycle

Step 01

Configure Rules

Enable global maintenance mode or downtime, or control app updates (force/optional) with AppSync using platform-wise or global targeting—applied on app launch.

Rules Dashboard

Force Update

Maintenance

DEVICE

CLOUD

STATUS

200 OK

PING

12ms

Step 02

SDK Handshake

On app launch, the lightweight SDK connects with AppSync Cloud to keep users updated with the latest app version.

Step 03

Instant Enforcement

Publish your app update via the App Store or Google Play. AppSync prompts users to update on app launch, while maintenance mode can be enabled instantly without a new release.

Force Update
Required

Update v2.4.0

Zero Friction Integration

One `sync()` call Done

Drop the SDK into your iOS, Android, Flutter, or React Native app. Call sync at startup. AppSync handles version checks, force prompts, optional prompts, and maintenance routing, all behind the SDK.

    
    
    
    
  

import AppsOnAir_AppSync
import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

    // AppSync Class instance create
    let appsOnAirSyncService = AppSyncService.shared

    // AppSync common services Initialization
    appsOnAirSyncService.sync(directory: ["showNativeUI":false]) { appUpdateData in
        // Write the code here when showNative UI is false
    }
    return true
  }
  // Remaining contents of your AppDelegate Class...
}
    

import com.appsonair.appsync.services.AppSyncService

class MainActivity : AppCompatActivity() {
  private val TAG = "MainActivity"
  override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      
      // Initializing AppSyncService with callback for custom UI
      AppSyncService.sync(
          this,
          options = mapOf("showNativeUI" to true),
          callBack = object : UpdateCallBack {
              override fun onSuccess(response: String?) {
                  Log.d(TAG, "onSuccess: ")
              }

              override fun onFailure(message: String?) {
                  Log.d(TAG, "onFailure: ")
              }
          },
      )
  }
}
    

@override
void initState() {
  AppSyncService.sync(
    context,
    options: {'showNativeUI': false},
    customWidget: (response) {
      return Column(
        mainAxisSize: MainAxisSize.min,
        children: [
          Text("Application Name : ${response["appName"]}"),
          Text(
            "Application Version : ${response["updateData"]["buildNumber"]}",
          ),
          const SizedBox(height: 20),
          ElevatedButton(
            onPressed: () {},
            child: const Text('Update'),
          ),
        ],
      );
    },
  );
  super.initState();
}
    

const [data, setData] = useState<AppSyncResponse | null>(null);

useEffect(() => {
  sync({ showNativeUI: false }).then((res) => {
    setData(res);

    // Custom alert for android app update
    if (res.updateAvailable) {
      Alert.alert(
        "Update Available",
        "A new version of the app is available. Please update to the latest version.",
        [
          {
            text: "OK",
            onPress: () => Linking.openURL(res.updateData.updateLink!),
          },
        ]
      );
    }
  });
}, []);
    

Built For Every Mobile Team

Whoever ships your app, AppSync fits

Enterprise & Compliance

Enforce minimum supported versions for security audits, compliance windows, or GDPR-driven breaks. Flip the toggle from the dashboard with no commit needed.

Startups & Indies

When a critical bug surfaces, immediately show a force-update prompt to nudge users toward the new store version, with no version-check code change required.