very simple mobile/web audio/video recorder APP (react-native)

technologies to be used:
- react-native (possibly without EXPO, but I'm open to change my opinion)
- nativebase UI library
- API integration (provided by me)

I need a very simple mobile/web app, using react-native, it should run on Ios, android (5+), web. It should also work as PWA.
the app is a audio/video recorder, after the recording, the audio file will be posted together with the token API (provided), to a webpage (using a webview), to apply an audio effect,
then the audio will be saved into the server with an API (provided by me).
- home page, empty page with "hello {username}!" and side drawer menu
- Voice recorder:
- with countdown timer
- audio input level
- with the possibility to choose the audio input
- webpage integrated with a webview to apply an audio effect (the webpage with the effects is not part of this project, but the integration with the mobile app YES.)
- Edit page for the text transcripted (using the API provided)

I will provide the:
- react-native boilerplate
- Server API endpoints + token

the app will be multilanguage (italian/english). Every string must be with the i18n.

Some of the libraries to be used are:
- redux/saga
- nativebase UI
- react-native-encrypted-storage
- i18next

Any other library need to be approved before to be used in the project.
More details and sketches of graphics layout will be provided to the right freelancer.

Payment details:
I'll create the milestone, but no money will be released until the app is fully working, bugs free, and source code is tested personally by me.