Please make sure that your console is running the most stable versions of npm and node (even-numbered versions).
```
npm --version && node --version
```
If not, please change your node version in the shell, assuming you have installed node and npm via the Homebrew Package Manager.
```
brew install node@12
brew unlink node
brew link node@12
```
For more information and background information, please refer to this link: https://apple.stackexchange.com/questions/171530/how-do-i-downgrade-node-or-install-a-specific-previous-version-using-homebrew
You will now need to either connect an Android device to your computer or run an emulated Android device using AVD Manager which comes shipped with Android Studio. To run an emulator using AVD Manager:
1. Download and run Android Studio
2. Click on "Open an existing Android Studio Project"
3. Open `build.gradle` file under `BlueWallet/android/` folder
4. Android Studio will take some time to set things up. Once everything is set up, go to `Tools` -> `AVD Manager`
5. Click on "Create Virtual Device..." and go through the steps to create a virtual device
6. Launch your newly created virtual device by clicking the `Play` button under `Actions` column
Once you connected an Android device or launched an emulator, run this:
The above command will build the app and install it. Once you launch the app it will take some time for all of the dependencies to load. Once everything loads up, you should have the built app running.
I was not satisfied with existing iOS Bitcoin apps, especially with BreadWallet (the one I mainly used) where development stalled and they could not even deliver such features as SegWit, RBF and custom fees (at the times where custom fees were especially needed).
So I knew I could create one to use myself and let others use it.
I had experience with awesome bitcoin-js lib (javascript), and since I dont own any Macs, don't plan to and not going to learn ObjC/Swift - ReactNative (where you also write in javascript) was an obvious choice.
Grab an issue from [the backlog](https://github.com/BlueWallet/BlueWallet/projects/1), try to start or submit a PR, any doubts we will try to guide you.
