# Calert vs 온트너

The clearest difference is in-app purchases: 온트너 at none against Calert's 2. Calert's advantage is update cadence (every 4 days vs every 4 months) and iOS requirement (13.4 vs 16.0). On price, ads and device support there is nothing between them.

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

Calert ships an update every 4 days, 온트너 every 4 months. The most recent releases landed on September 15, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Calert | 온트너 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 4 months |
| Size | 42 MB | 169 MB |
| Requires iOS | **13.4** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [JAEHA LEE](https://appshunter.io/developer/1743533367) | [CJ ENM Co., Ltd.](https://appshunter.io/developer/366509413) |

## What reviewers say

### Calert

[App page](https://appshunter.io/ios/app/calert/id6737229946)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calert Plus Monthly | $1.99 | per month |
| Calert Premium 월간 구독 | $1.99 | per month |


### 온트너

[App page](https://appshunter.io/ios/app/cj/id6757209509)

**In-app purchases:** none


## Frequently asked questions

### Is Calert free?

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

### Is 온트너 free?

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

### Do Calert or 온트너 have ads?

Neither Calert nor 온트너 shows ads.

### Which is updated more often, Calert or 온트너?

Calert ships an update every 4 days, and 온트너 every 4 months. Most recently, Calert was updated on September 15, 2026 and 온트너 on September 28, 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.*