# 이건달력 vs Rostr

The clearest difference is in-app purchases: 이건달력 at none against Rostr's 2. 이건달력 also leads on ads (none vs shown) and iOS requirement (15.6 vs 18.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Rostr sells 2 in-app purchases, starting at $3.99 per month. 이건달력 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 이건달력 | Rostr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rostr-roster-sharing/id6759208293/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Weekly | Weekly |
| Monetization | — | Free with in-app purchases |
| Size | 19 MB | 74 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hwangro Lee](https://appshunter.io/developer/1792207219) | [Arami Tech LLC](https://appshunter.io/developer/6825196014) |

## What reviewers say

### 이건달력

[App page](https://appshunter.io/ios/app/2026/id6741156795)

**Features:** macOS Compatibility

**In-app purchases:** none


### Rostr

[App page](https://appshunter.io/ios/app/rostr-roster-sharing/id6759208293)

Easily share work schedules with friends and see when you're both working. Features AI-powered roster scanning, shared calendars, and overlap alerts for spontaneous meetups. Create private groups for small teams and access schedules offline.

**Highlights:** AI Roster Scanning, Shared Group Calendars, Overlap Alerts, Offline Access, Private Group Creation, Dark/Light Mode

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rostr Pro Monthly | $3.99 | per month |
| Rostr Pro Yearly | $29.99 | per year |


## Frequently asked questions

### Is 이건달력 free?

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

### Is Rostr free?

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

### Do 이건달력 or Rostr have ads?

Rostr shows ads; 이건달력 does not.

### Which is updated more often, 이건달력 or Rostr?

이건달력 ships an update weekly, and Rostr weekly. Most recently, 이건달력 was updated on November 8, 2026 and Rostr on October 31, 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.*