如何判断一个 App 是原生的还是 Flutter 的

Question

I would like to know whether a given mobile app is native or written using flutter. Is there any way to know that from the build files (apk, ipa.. etc). How can I detect if an app is native or flutter?

Answer 1

Upload the apk file on http://www.javadecompilers.com/apk

If you find a folder flutter in sources so this app is a flutter app

Answer 2

One can check from the phone by enabling layout bounds. If the app show bounds around all component then it might be developed with native android or react native. Still, in the case of flutter, it directly accesses canvas from the native side and paints on it, so it will not show any bounds around the components due to the direct use of canvas.

Here is SS of the app made with Flutter and native or other frame work which uses the native component.

Flutter
Native Component
.

Answer 3

You can find whether an app is using flutter or not by using the following method,

1. Extract the apk file. You can simply rename the file extension to.zip and extract it.
2. Navigate to the lib folder.
3. You will find a list of subfolders for different architectures.
4. The subfolder will contain a libflutter.so file. This libflutter.so will be present in all flutter apps.

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Here is a screenshot of the file from the Flutter Gallery app .

Answer 4

Of course, you can find out by extracting the APK. But there is another simple way:

Install the app on your device, then open it and check list or grid in the UI .

If you feel that when you scroll with two fingers, the speed doubles, and when you scroll with one finger, then the application is developed in Flutter.

Answer 5

Simple solution:

1. Activation of the tile:

• Developer Options ON
• Quick settings developer tiles
• Show layout bounds

2. Open app, swipe down from the top of the screen and touch icon layout to enable show layout bound.

3. Flutter app won't show small pieces layout of UI but Native app does.

Answer 6

1. download and decode apk with apktool

java -jar apktool.*.jar d file.apk -o output

2. open up AndroidManifest.xml in a text editor

3. search for occurrences of flutter within the file

if using vim, at the terminal prompt,

vim +/flutter +"set hlsearch" AndroidManifest.xml

such occurrences could be flutter plugins and 'flutterEmbedding' which is responsible for integrating flutter within an Android app.

Answer 7

We can do the Finger-scroll test.

Start by scrolling the app with one finger, then use two fingers. Make sure you are scrolling at the same pace. If the speed of the scroll increases with every finger you add, then it's built using Flutter.