Privacy Policy | SQLのエ

Overview

"SQLのエ" (the "App") is a SQL learning app provided by 2PIECE K.K. ("we"). We prioritize your privacy. The App is designed to be account-freead-freefully local.

Last updated: June 9, 2026

Information We Collect

The App does not collect or transmit any personally identifiable information. We do not access your name, email, phone number, location, or contacts.

Stored only on your device

For your learning experience, the following data is stored only on your iPhone (via SwiftData). It is never sent to our servers or any third party.

Data	Purpose
Answer history, correctness, progress	Show study records, surface weak questions
Streak days, study time	Display continuity stats
Achievement (badge) status	Show accomplishments
Settings (DBMS, text size, sound, etc.)	Adjust app behavior

Using "Reset learning data" in Settings permanently deletes this data from the device. Deleting the App also removes all data.

Tracking & Third Parties

The App does not track you under App Tracking Transparency (ATT).
It contains no advertising or analytics SDKs.
Tapping "Try it for real" links (e.g., DB Fiddle, SQLite Online) opens external sites in your browser, governed by those sites' own policies.

Networking

All features work fully offline. Network access happens only for these optional actions, none of which transmit your learning data:

Opening external sites from "Try it for real"
App Store rating/review prompts

Children

Because the App collects no personal information, it is safe for users of all ages. We never collect personal data from children without parental consent.

Changes to this Policy

We may update this policy as needed and will post material changes here. Please check this page from time to time for the latest version.

Provider: 2PIECE K.K.