# Frequently asked questions > Short answers to what people ask most, from “what if the answer is wrong?” to “can Adea change my data?”. Source: https://adea.app/docs/faq ## Using Adea ### What if the answer is wrong? Open the answer and look at how it was worked out: the sources, the numbers and the assumptions it rests on. If an assumption is wrong, a developer or administrator corrects it under **What Adea understands**, and every answer after that follows the correction. If a number looks wrong and you can't see why, ask the question again with more detail, such as the period or what you mean by a word of your own. A failed or refused answer costs nothing. ### What can I ask? Anything about your business that your data can answer: how many, how much, which customers, and why a number moved. You can also paste an order number or an email address to see what happened to that record. See [Ask a question](/docs/ask). ### What does a question cost? Most questions are free: a number Adea already watches, a record looked up by its number, and a new question over your tables. A deep question and **Find out why** use one Deep credit, and the button shows the cost. See [Credits and plans](/docs/plans-and-credits). ### Do we pay per person? No. One price covers the whole company, however many people use Adea. ## Your data ### Can Adea change my data? No. Adea connects with a user that can only read, checks that before it connects, and refuses a user that can write. It never writes to your database, your code or anything else you connect. ### Which databases can I connect? PostgreSQL, MySQL, MariaDB, Amazon Redshift, BigQuery and Snowflake. See [Connect a database](/docs/connect-database). You can also connect your code, to find out which change moved a number: see [Connect your code](/docs/connect-code). ### How long does it take to connect? About five minutes when the read-only user already exists. If you don't run the database yourself, send the person who does [the developer link](/docs/developer-link). They connect it without an account. ### Does Adea keep a copy of my data? No. Adea reads what a question needs, works out the answer and drops the rows. It keeps the totals behind the numbers it watches, so it can tell what is normal, and the rows you save in a list. ### Where is my data, and is it used to train AI? Adea and its database run in the EU. Your data is never used to train AI models. See [Security facts](/docs/security-facts). ## People and access ### Who sees what? Everyone in the company sees the same numbers, unless you limit it. On Pro and Business an administrator can hide or mask tables and columns for a role, and give a person only one location or team. An AI assistant never sees more than the person who connected it. See [Access and roles](/docs/access-and-roles). ### Can I show a dashboard to someone outside the company? Yes, on Pro and Business. An administrator creates a link that anyone can open, and can switch it off at any time. See [Dashboards and sharing](/docs/dashboards-and-sharing). ## Plans ### Can I try it before I pay? Yes. The Free plan needs no card and has no end date, and a new company can try Pro for 14 days. ### Can I cancel? Yes. An administrator cancels under **Settings**, then **Plan and billing**. You can cancel a trial at any time, and nothing is charged. ### Can I take my data with me? An administrator can export everything Adea holds for the company under **Settings**, then **Company**: your questions and answers, dashboards, lists, insights, the team and the security log, as files. Your own database stays where it is, so it is not part of the export. The export asks for a passkey, and a link to the files comes by mail. See [Credits and plans](/docs/plans-and-credits) for what each plan includes.