Translation pending professional review. The Spanish text is the reference version.

Licenses

Third-party software packages used by the Possible Voice mobile app, with a link to their official page.

Last updated: October 26, 2026

1. About this list

Possible Voice uses open-source and third-party software packages. Each package is distributed under its own licence, which you can check on its pub.dev page. This page does not copy the licence texts.

The list comes from the dependency file of the mobile app, dated 27 October 2026. It only includes what the distributed app contains: not development or testing dependencies. The list only covers the mobile app: the software on our servers is not distributed with it.

2. Flutter and Dart SDK packages

The Flutter and Dart SDK packages (flutter, flutter_localizations, flutter_web_plugins and sky_engine) are governed by their own licences and are not listed one by one.

3. Packages

Packages in the mobile project
Package	Version
_flutterfire_internals	1.3.77
app_links	7.2.2
app_links_linux	1.0.4
app_links_platform_interface	2.0.4
app_links_web	1.0.5
archive	4.5.2
args	2.7.0
asn1lib	1.6.5
async	2.13.1
characters	1.4.1
clock	1.1.3
code_assets	1.2.1
collection	1.19.1
connectivity_plus	7.3.2
connectivity_plus_platform_interface	2.1.0
convert	3.1.2
cross_file	0.3.5+5
crypto	3.0.7
cupertino_icons	1.0.9
dart_jsonwebtoken	3.4.1
dart_webrtc	1.8.2
dbus	0.8.0
device_info_plus	13.3.0
device_info_plus_platform_interface	8.1.0
ffi	2.2.0
ffi_leak_tracker	0.1.2
file	7.0.1
file_selector_linux	0.9.4+1
file_selector_macos	0.9.5+1
file_selector_platform_interface	2.7.0
file_selector_windows	0.9.3+6
firebase_auth	6.7.0
firebase_auth_platform_interface	9.1.0
firebase_auth_web	6.3.0
firebase_core	4.15.0
firebase_core_platform_interface	8.1.1
firebase_core_web	3.12.0
fixnum	1.1.1
flutter_plugin_android_lifecycle	2.0.35
flutter_secure_storage	11.2.0
flutter_secure_storage_darwin	0.4.3
flutter_secure_storage_linux	3.0.3
flutter_secure_storage_platform_interface	2.1.1
flutter_secure_storage_web	2.1.1
flutter_secure_storage_windows	4.2.2
flutter_webrtc (local copy, see section 4)	1.6.2+hotfix.4
google_mobile_ads	9.2.0
google_sign_in	7.2.0
google_sign_in_android	7.2.17
google_sign_in_ios	6.3.6
google_sign_in_platform_interface	3.1.0
google_sign_in_web (local copy, see section 4)	1.1.3+possiblevoice
hooks	2.0.2
http	1.6.0
http_parser	4.1.2
image	4.12.0
image_picker	1.2.4
image_picker_android	0.8.13+25
image_picker_for_web	3.1.1
image_picker_ios	0.8.13+12
image_picker_linux	0.2.2
image_picker_macos	0.2.2+1
image_picker_platform_interface	2.11.2
image_picker_windows	0.2.2
in_app_purchase	3.3.1
in_app_purchase_android	0.5.5
in_app_purchase_platform_interface	1.4.1
in_app_purchase_storekit	0.4.14
intl	0.20.3
jni	1.1.0
jni_flutter	1.0.4+1
jni_util	1.0.0
json_annotation	4.12.0
livekit_client	2.13.1
logger	2.8.0
logging	1.3.0
material_color_utilities	0.13.0
meta	1.18.3
mime	2.1.0
mime_type	1.0.1
nm	0.6.0
objective_c	9.5.0
package_config	3.0.0
package_info_plus	10.2.2
package_info_plus_platform_interface	4.1.0
path	1.9.1
path_provider	2.1.6
path_provider_android	2.3.1
path_provider_foundation	2.6.0
path_provider_linux	2.2.2
path_provider_platform_interface	2.1.3
path_provider_windows	2.3.0
permission_handler	13.0.2
permission_handler_android	14.1.0
permission_handler_apple	9.6.2
permission_handler_html	0.1.4+1
permission_handler_platform_interface	4.4.1
permission_handler_windows	0.2.2
petitparser	7.0.2
platform	3.2.0
plugin_platform_interface	2.1.8
pointycastle	4.0.0
posix	6.5.2
protobuf	6.1.0
pub_semver	2.2.1
record_use	0.6.0
sdp_transform	0.3.2
share_plus	13.3.1
share_plus_platform_interface	7.2.0
shared_preferences	2.5.6
shared_preferences_android	2.4.28
shared_preferences_foundation	2.5.7
shared_preferences_linux	2.4.1
shared_preferences_platform_interface	2.4.2
shared_preferences_web	2.4.3
shared_preferences_windows	2.4.1
source_span	1.10.2
string_scanner	1.4.1
synchronized	3.4.2
term_glyph	1.2.2
typed_data	1.4.0
url_launcher	6.3.3
url_launcher_android	6.3.33
url_launcher_ios	6.4.2
url_launcher_linux	3.2.3
url_launcher_macos	3.2.6
url_launcher_platform_interface	2.3.2
url_launcher_web	2.4.3
url_launcher_windows	3.1.6
uuid	4.6.0
vector_math	2.4.0
web	1.1.1
webrtc_interface	1.5.1
webview_flutter	4.14.1
webview_flutter_android	4.14.1
webview_flutter_platform_interface	2.15.1
webview_flutter_wkwebview	3.27.0
win32	6.4.0
win32_registry	3.0.3
xdg_directories	1.1.0
xml	7.0.1
yaml	3.1.4

4. Local copies

The app uses a local copy of flutter_webrtc, version 1.6.2+hotfix.4, instead of the version published on pub.dev. That copy includes its own notices and licence. It keeps its authors' MIT licence and notices file (NOTICE) unchanged, and only adds one fix of ours to an Android file, to stop the app from closing when joining rooms with many people.

The app also uses its own version of google_sign_in_web (1.1.3+possiblevoice) instead of the one published on pub.dev. It is our own code, with no third-party code: it only keeps the web app from loading Google's identity services when it opens, and does nothing on Android or iPhone. That is why the app no longer includes google_identity_services_web.

5. Third-party services

The app also uses third-party services that are not software packages: Firebase, Google and Apple sign-in, Google Play and the App Store (purchases), Google AdMob and the YouTube player. Their terms are described on the Privacy policy, Advertising, Subscriptions and Room music pages.

6. Questions

Write to us .