Third-party licenses
Last updated: July 12, 2026
PayAppCheck is proprietary software. No license to PayAppCheck itself is granted on this page. It is built with the open-source components below; we acknowledge their copyright and license notices here with thanks. Full license texts are available at spdx.org/licenses.
Fonts
•Inter · © The Inter Project Authors · SIL Open Font License 1.1.
•Material Symbols · © Google · Apache License 2.0.
Web application
•React and React DOM · © Meta Platforms, Inc. and affiliates · MIT License.
•React Native and React Native Web · © Meta Platforms, Inc. / © Nicolas Gallagher · MIT License.
•Expo (expo-router and expo modules) · © 650 Industries, Inc. · MIT License.
•react-native-svg, react-native-screens, react-native-reanimated, react-native-gesture-handler, react-native-safe-area-context · © Software Mansion and contributors · MIT License.
•@microsoft/signalr · © Microsoft Corporation · MIT License.
Server
•ASP.NET Core and Entity Framework Core · © Microsoft Corporation · MIT License.
•ClosedXML (with DocumentFormat.OpenXml and ExcelNumberFormat) · MIT License.
•SixLabors.Fonts · © Six Labors · Apache License 2.0.
•PdfPig · © UglyToad · Apache License 2.0. Includes Adobe AFM font metrics under Adobe’s permissive license.
•Npgsql and Npgsql.EntityFrameworkCore.PostgreSQL · PostgreSQL License.
•Serilog · Apache License 2.0.
•Google.Apis.Auth · © Google LLC · Apache License 2.0.
•Swashbuckle.AspNetCore and Scalar.AspNetCore · MIT License.