# 科大通 vs 1CalendarS

The clearest difference is review sentiment: 1CalendarS at 100% against 科大通's 25%. 1CalendarS also leads on update cadence (every 3 weeks vs every 10 months). 科大通's advantage is in-app purchases (none vs 2). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 1CalendarS sells 2 in-app purchases, starting at $1.99 per month. 科大通 asks for nothing beyond the download.

科大通 ships an update every 10 months, 1CalendarS every 3 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 科大通 | 1CalendarS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/1calendars/id1538966367/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 25.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 3 weeks** |
| Monetization | — | Freemium |
| Size | 188 MB | 193 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Beijing Synjones Chengtong IT Co.,Ltd.](https://appshunter.io/developer/736575065) | [KAIROS Company Limited](https://appshunter.io/developer/1495144014) |

## What reviewers say

### 科大通

[App page](https://appshunter.io/ios/app/id1324448255)

**In-app purchases:** none


### 1CalendarS

[App page](https://appshunter.io/ios/app/1calendars/id1538966367)

Efficiently manage your schedule with multiple calendar views and customizable reminders. Sync your events across all your Apple devices seamlessly. Offers a free version with an optional premium subscription for enhanced features.

**Highlights:** Day, week, month, and list views, Cross-device calendar synchronization, Customizable reminders, Edit and modify calendar entries, Free to download and use, Premium subscription for advanced features

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1CalendarS月费高级会员 | $1.99 | per month |
| 1CalendarS年费高级会员 | $19.99 | per year |


## Frequently asked questions

### Is 科大通 free?

科大通 is free to download, with no in-app purchases.

### Is 1CalendarS free?

1CalendarS is free to download, with in-app purchases available.

### Do 科大通 or 1CalendarS have ads?

Neither 科大通 nor 1CalendarS shows ads.

### Which is updated more often, 科大通 or 1CalendarS?

科大通 ships an update every 10 months, and 1CalendarS every 3 weeks. Most recently, 科大通 was updated on November 6, 2026 and 1CalendarS on November 3, 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.*