We support and use alot of open source software at OptIn. We would like to thank you to the following projects and the thousands of contributors that help make open source great!

Abseil
Alamofire
Alamofire Network Activity Logger 
BoringSSL-GRPC
Branch
Firebase
Google App Measurement
Google Data Transpot
Google Utilities
gRPC
GTM Session Fetcher
Introspect
leveldb
nanopb
Partial Sheet
Promises
SD Web Image
SD Web Image Swift UI
Swift Proto Buf
Swift UIX
Swipe Cell Kit
Roboto font
Sora font
Apache v2
MIT
MIT
Apache v2, Google copyright and ISC license
MIT
Apache v2
Apache v2
Apache v2
Apache v2
Apache v2
Apache v2
MIT
BSD 3-Clause
zlib
MIT
Apache v2
MIT
MIT
Apache v2
MIT
MIT
Apache v2
SIL Open Font License