AppJars

About AppJars™

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AppJars is developed and maintained by Flowing Code S.A., a software development company based in Argentina, certified under ISO 9001:2015 and registered under Argentina’s Knowledge Economy Promotion Regime (Law 27.506). Flowing Code S.A. owns all intellectual property rights in the AppJars products.

To learn more about the team behind AppJars, visit flowingcode.com.

AppJars™ Privacy Policy

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Version 1.0 — effective 2026-01-01

This Privacy Policy describes how Flowing Code S.A. (“AppJars”, “we”, “us”) collects, uses, and shares personal information about visitors of the AppJars website (“you”).

1. Who is the controller of your personal information?

Flowing Code S.A. is the data controller for personal information collected through the AppJars website.

Contact for privacy matters: see https://appjars.com/contact.

2. What we collect, why, and how long we keep it

IP address, user agent, referrer, pages visited. Used for basic analytics, traffic diagnostics, and security. Stored in aggregated server logs.
Cookies. See Section 3.

3. How we use your information

We use the personal information described above to:

AppJars™ Privacy Policy — Archive

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Versions

Version 1 — 01/01/2026

Contact

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Frequently Asked Questions

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General & Architecture

What is the required technology stack?

AppJars are Java libraries for the Spring Boot ecosystem.

Java: Requires Java 21 or later.
Spring Boot: Requires Spring Boot 4.1.x or later.
Vaadin: Required for components that include a UI layer; compatible with Vaadin 25.2 and later. If you are only using the backend or service layer of an AppJar, Vaadin is not required.

Do I have to adopt everything at once, or can I use AppJars independently?

You can pick and choose. AppJars are designed as independent “building blocks,” so you adopt only the functionality you need and leave the rest out. Each AppJar is made up of several Maven modules that you add to your project as dependencies.

Do AppJars phone home or send telemetry?

No. AppJars do not phone home or send telemetry. They run entirely inside your own application and require no network communication with our servers to operate.

Is the source code available?

Yes. The source is available so you can attach it in your IDE to read and step through the code while debugging your own application.

Integration & Database

How is the database schema managed? Do you provide SQL scripts?

We provide standard JPA Entities. We do not force specific SQL scripts or Liquibase changelogs because naming strategies vary significantly between projects. We recommend configuring your ORM (e.g., Hibernate) to handle the schema generation or validation during your development process based on the provided entities.

Does it support my database engine?

Since we use standard JPA (Java Persistence API), AppJars are database-agnostic. They support any relational database compatible with Hibernate, such as PostgreSQL, MySQL, Oracle, SQL Server, and MariaDB.

Free Mode

Is there a free mode?

Yes. Without any paid license, AppJars run in free mode, which gives you core functionality within certain usage limits. This lets you add an AppJar to a real project and evaluate it before committing.

Can I use free mode in production?

Yes, as long as you stay within the free-mode usage limits.