Ttlock flutter mobile app ios/andriod

We integrated ttlock into our pms, to send e-key to phone numbers

We need very concise app to just :
- login by phone number
- get e-keys for that phone number
- unlock via e-key

Our pms issues e-key to phone# with auto create if not registered
Default code= saudi arabia +966

We need both ios and andriod apps ready to publish
We need the source code structured and documented