Open Source Credits
ChirpChirp is built with the help of these open source libraries.
Opus (swift-opus)
High-quality, low-latency audio codec for push-to-talk voice communication.
License: BSD 3-Clause
github.com/alta/swift-opusGRDB.swift
SQLite toolkit for Swift. Local encrypted message storage and persistence.
License: MIT
github.com/groue/GRDB.swiftMapLibre Native
Open source map rendering engine for offline peer location maps.
License: BSD 2-Clause
github.com/maplibre/maplibre-gl-native-distributionOpenFreeMap
Free map tile service for offline map downloads. No API key, no tracking.
License: Open Data
openfreemap.orgApple Frameworks
- MultipeerConnectivity -- peer-to-peer mesh networking
- CoreBluetooth -- BLE device discovery
- NearbyInteraction -- Ultra-Wideband precision ranging
- Speech -- on-device speech recognition for translation
- Translation -- on-device language translation
- CryptoKit -- AES-256-GCM encryption and Ed25519 signatures
- CoreMotion -- dead reckoning navigation
- SoundAnalysis -- environmental audio classification
- AVFoundation -- audio capture and playback
We are grateful to the open source community for making these tools available.