# Calendars vs 轻投OA

The clearest difference is in-app purchases: 轻投OA at none against Calendars's 20. 轻投OA also leads on iOS requirement (9.0 vs 18.2). Calendars's advantage is chart position (#150 vs unranked) and update cadence (weekly vs fortnightly). On price and ads there is nothing between them.

Both are free to download. Calendars sells 18 in-app purchases, starting at $3.99 per month. 轻投OA asks for nothing beyond the download.

Calendars ships an update weekly, 轻投OA fortnightly. The most recent releases landed on November 1, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Calendars | 轻投OA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (123K ratings)](https://appshunter.io/ios/app/calendars-schedule-planner/id608834326/reviews)** | — |
| Number of ratings | **123K** | — |
| Positive reviews | 55.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | Freemium | — |
| Best chart rank | **#150** | — |
| Size | 413 MB | 35 MB |
| Requires iOS | 18.2 | **9.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Readdle Technologies Limited](https://appshunter.io/developer/285035419) | [北京飒思软件有限公司](https://appshunter.io/developer/1192152007) |

## What reviewers say

### Calendars

[App page](https://appshunter.io/ios/app/calendars-schedule-planner/id608834326)

**Currently charting:** #150 Top Grossing · Productivity, #160 Top Free · Productivity (US App Store)

This app combines calendar, task management, and habit tracking to boost productivity and organization. It offers seamless syncing across Apple devices and integrates with popular services like Google Calendar. Plan your day, manage tasks, and build routines with customizable views and features.

**Highlights:** Calendar and task management, Habit tracking and routine building, Cross-device syncing, Natural language event creation, Integration with Google Calendar and Zoom, Customizable views and widgets

**Features:** Family Sharing, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (18)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calendars PRO 1 Month | $3.99 | per month |
| Calendars by Readdle: Interesting Calendars | $3.99 | per year |
| Calendars PRO 1 Month | $3.99 | per month |
| Calendars PRO 1 Year | $19.99 | per year |
| Calendars PRO 1 Year | $19.99 | per year |
| Calendars PRO 1 Year | $19.99 | per year |
| Calendars PRO 1 Year | $19.99 | per year |
| Calendars PRO 1 Year | $21.99 | per year |
| Calendars PRO 1 Year | $29.99 | per year |
| Calendars PRO Lifetime | Free | one-time |
| Invites & Attendees Upgrade | $1.99 | one-time |
| Smart Input Upgrade | $1.99 | one-time |
| Full Upgrade | $4.99 | one-time |
| Interesting Calendars | $5.99 | one-time |
| My schedule planner, Organizer | $6.99 | one-time |
| Full Pack | $12.99 | one-time |
| Reminders & Calendars | $19.99 | one-time |
| Recurring Events | $31.99 | one-time |

**What reviewers like**

- 🌟 Excellent calendar app
- 👍 Easy to use and organize
- 🎨 Helpful color-coding
- 📆 Seamless integration with other calendars
- 🗓️ Detailed monthly/weekly views

**What reviewers complain about**

- 🐛 Occasional glitches and data loss
- 💰 Concerns over subscription model
- 🕰️ Cumbersome date/time selection process
- 🔍 Limited location search functionality
- 🔄 Sync issues between devices

**Reported bugs**

- Disappearing events and appointments
- Upgrade process causing data loss
- Freezing and crashing on certain devices

**Requested features**

- Recurring events for free users
- Customizable widgets and app icons
- Ability to archive/restore past events
- Improved Apple Watch integration
- Shared calendars and family management


### 轻投OA

[App page](https://appshunter.io/ios/app/oa/id1469867554)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calendars free?

Calendars is free to download, with in-app purchases available.

### Is 轻投OA free?

轻投OA is free to download, with no in-app purchases.

### Do Calendars or 轻投OA have ads?

Neither Calendars nor 轻投OA shows ads.

### Which is updated more often, Calendars or 轻投OA?

Calendars ships an update weekly, and 轻投OA fortnightly. Most recently, Calendars was updated on November 1, 2026 and 轻投OA on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*