"簡単シンプルな顧客管理帳" is a user-friendly customer and sales management app designed for professionals in customer service and related fields. The main features include customer management, monthly totals, evaluation during customer interactions, calendar for scheduling and history viewing, data aggregation, and graphical representation on a monthly and yearly basis.

For users opting for the Premium Plan, benefits include ad removal, detailed search functionality for customers, viewing of individual customer aggregation screens, access to overall customer aggregation, memo list viewing, weekly calendar feature, year-over-year analysis, customer total ranking, Type 2 display in aggregation tab, customizable cell sizes in the calendar view, date-specific data export in CSV format, and more.

For pricing and subscription details, users are advised to check within the app (auto-renewable subscription). It's important to note that payments are processed through the App Store (iTunes account) for auto-renewable subscriptions. Users must manually cancel the subscription in the iTunes Store settings at least 24 hours before the end of the current period to avoid automatic renewal.