# Calendar S - Simple Efficient — Recommend efficient app

> Recommend efficient app (iPhone/iPad app by 寅康 童.)

- Source: https://appshunter.io/ios/app/calendar-s-simple-efficient/id1489584166 (this page in markdown: same URL + `.md`)
- Developer: [寅康 童](https://appshunter.io/developer/966263704)
- Category: Productivity, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 9.0 · 173 MB
- Languages: English, Japanese, Chinese, Chinese
- Released: 2020-03-06
- Data updated: 2026-05-14
- User reviews in markdown: https://appshunter.io/ios/app/calendar-s-simple-efficient/id1489584166/reviews.md

## What is Calendar S?

Calendar S, an efficient calendar to-do app, reduces the operation to the simplest and mentions the highest efficiency.
With a few simple operations, you can organize your daily life, study, work, and fitness.
You can use the to-do and calendar together to focus on the completion status or use the calendar to arrange your schedule carefully.

No ads, no fees

Minimalist design: the interface is clear and intuitive, and the details are carefully designed to make you more aware of your schedule
Data security: you can sync with the server without logging in
Personalized reminder: multiple circular reminder modes to meet various personalized needs
Simple operation: Convenient and easy to use, clear function at a glance, operation as you want
Ebbinghaus: Memory curve circulation mode, helps learning working memory, a good helper for learning
Pomodoro Clock: focus on time, with white noise, let you concentrate on doing the things in front of you, and also help you fall asleep
Operation history: complete event records and operation records for easy inquiry
Lunar calendar adaptation: carefully adapted to the lunar cycle reminder mode, more suitable for Chinese people
Seamless connection: system calendar import, schedule seamless connection
Automatic processing: Unfinished to-do events are automatically moved to today, and completed events are automatically removed the next day without tedious operations

Stay tuned:
Carefully select more loving ringtones
Share schedules and learn effective arrangements for others

Looking forward to your further suggestions:
Email: swiftstar001@gmail.com


## Version history (last 5 releases)

### 1.1.5 — 2021-01-04

Fix the bug of display error in 2021

Happy New Year!!!

### 1.1.4 — 2020-09-15

1. Optimize the software processing flow and greatly increase fluency
2. Fix known bugs

### 1.1.3 — 2020-09-03

1. Add a recycle bin, the accidentally deleted event can be recovered
2. Increase the Pomodoro function
3. Fix known bugs

### 1.1.2 — 2020-08-06

1.Added Ebbinghaus memory curve cycle mode
2.Can upload events to the subscription center
3.Add guide help
4.Fix known bugs

### 1.1.1 — 2020-07-20

Fix crash bug

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All apps by 寅康 童: https://appshunter.io/developer/966263704

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-14.*