신토스 is a free Android app in the Business & Productivity category, specifically in the Finance subcategory. With this app, users can make credit card payments for personal expenses such as private lessons, tutoring fees, service charges, parents' massage chairs, and air conditioning installation fees.

The app requires certain permissions, which are obtained in accordance with the "Act on Promotion of Information and Communications Network Utilization and Information Protection, etc." Only essential permissions necessary for the service are accessed. Here are the details of the permissions:

[Essential Permissions]

■ None

[Optional Permissions]

■ Storage - Access to read, modify, or delete content on the SD card is necessary for this feature.

■ Photos/Camera - Access to this feature is required for taking photos and attaching them to posts.

■ For devices using Android versions belowPlease check if the device manufacturer provides the option to upgrade the operating system. If so, please update to version 6.0 or higher. However, even if the operating system is upgraded, the permissions granted in the existing app will not change. Therefore, to reset the permissions, you need to uninstall the installed app and reinstall it.