Flutter - Get Unique Device ID

Question

I am making an app with token based system. So users can buy tokens and using them they can make some actions. Each user gets 10 tokens for free (as a trial version) after creating an account using email and password.

I want to prevent that user gets another 10 tokens by getting a new account each time and I was wondering if there is something like unique device ID for both Android and iOS devices?

Can I use this for that purpose? https://pub.dartlang.org/packages/device_id#-example-tab-

Does this answer your question? [How to get unique device id in flutter?](https://stackoverflow.com/questions/45031499/how-to-get-unique-device-id-in-flutter) — reverie_ss, Jan 23 '20 at 15:55

CopsOnRoad · Accepted Answer · 2022-05-17T15:23:03.530

27

Use device_info_plus plugin.

In your pubspec.yaml file add this

dependencies:
  device_info_plus: any

Create a method:

import 'dart:io';
import 'package:device_info_plus/device_info_plus.dart';
// ...

Future<String?> _getId() async {
  var deviceInfo = DeviceInfoPlugin();
  if (Platform.isIOS) { // import 'dart:io'
    var iosDeviceInfo = await deviceInfo.iosInfo;
    return iosDeviceInfo.identifierForVendor; // Unique ID on iOS
  } else {
    var androidDeviceInfo = await deviceInfo.androidInfo;
    return androidDeviceInfo.androidId; // Unique ID on Android
  }
}

Use it like:

String? deviceId = await _getId();

or

_getId().then((id) {
  String? deviceId = id;
});

edited May 17 '22 at 15:23

answered Apr 08 '19 at 09:38

CopsOnRoad

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It's known to be null sometimes, it's documented as "can change upon factory reset". Use at your own risk, and it can be easily changed on a rooted phone. – Kamlesh Aug 31 '20 at 08:57
It's not worked. If i reinstalled the app the deviceId would change, – Nicholas Jela May 11 '21 at 14:30
1

@NicholasJela The device ID can only change after the phone is reset. – CopsOnRoad May 11 '21 at 17:27
1

@CopsOnRoad I have got 2 different deviceID on my same phone already. While my phone never reset. – Nicholas Jela May 12 '21 at 14:28
@NicholasJela Maybe you should file (or search) for an issue on Github page. – CopsOnRoad May 12 '21 at 14:33
@CopsOnRoad When I call it in the way instructed, I get an error `The await expression can only be used in an async function.` – MohitC May 17 '22 at 15:23

score 0 · Answer 2 · answered Apr 07 '19 at 19:25

0

Yes thats the plugin you need. If you really want to

I want to prevent that user gets another 10 tokens by getting a new account each time

You must as well check for rooted phone (it can change id)

You may want to consider using this GET IMEI

answered Apr 07 '19 at 19:25

CodeforCore

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I think Apple is not allowing to get IMEI anymore. – harunB10 Apr 07 '19 at 19:32
On Android it will return IMEI and on iOS it will return device id – CodeforCore Apr 07 '19 at 19:57
if we use this plug-in then app asks to grant Phone access permission which is not granted by users generally. I have an experience of this plug-in. – Kamlesh Aug 31 '20 at 08:59

Flutter - Get Unique Device ID

2 Answers2

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