Prerequisites
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Thanks to , you can run your app on your mobile device. Expo will even build your apps in the cloud for you as well, for free.
However, working on a mobile device can be slow and cumbersome so you may want to install and/or for the purpose of testing your app in an iOS or Android simulator and avoid twisting your neck by constantly looking up and down at your phone.
As part of your purchase, your app includes – which you'll need to have running in order to manage the server-side processes for your mobile app.
Before running the setup process, you will need an empty SQL or Mongo database, so fire up a new database using your favourite database service.
Gravity uses Mailgun for sending transaction emails to users, so Please for more information.
If you'd like to use the iOS simulator on your Mac for testing your app, or you'd like to get your hands dirty with some native code, download (it's free).
Using Expo without a developer account, you can run your app on your simulator or device. However, if you want to publish your application to the app store or invite Beta testers to install it on their device using , you'll need to join the , which costs $99 per year.
To run your app on the Android simulator, you'll need to download a free copy of Publishing your app on the Google Play store requires registering as a developer with a one-time fee of $25.