# KoOlis vs Prefecture Alerts

The clearest difference is in-app purchases: KoOlis at none against Prefecture Alerts's 2. KoOlis also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Prefecture Alerts sells 2 in-app purchases, starting at $4.99 per 7 days. KoOlis asks for nothing beyond the download.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 11, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | KoOlis | Prefecture Alerts |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (4 ratings)](https://appshunter.io/ios/app/prefecture-alerts/id6751842080/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 22.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | — | Freemium |
| Size | 97 MB | 13 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [UNDERSCOREHASH](https://appshunter.io/developer/1833084000) | [GCO Apps](https://appshunter.io/developer/1350106258) |

## What reviewers say

### KoOlis

[App page](https://appshunter.io/ios/app/koolis/id6751006777)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Prefecture Alerts

[App page](https://appshunter.io/ios/app/prefecture-alerts/id6751842080)

This app monitors prefecture websites across France for available appointment slots. It notifies users immediately via push, SMS, or email when a slot opens, saving them the time of manual checking. Users select their prefecture and appointment type to begin receiving alerts.

**Highlights:** Monitors over 120 prefectures and appointment types, Instant notifications via Push, SMS, or Email, Saves time by eliminating manual website refreshing, Supports various appointment types (residence permit, driver's license, etc.), Fast and reliable slot detection

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Weekly, 3 Days Trial) | $4.99 | per 7 days |
| Monthly Subscription | $9.99 | per month |


## Frequently asked questions

### Is KoOlis free?

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

### Is Prefecture Alerts free?

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

### Do KoOlis or Prefecture Alerts have ads?

Neither KoOlis nor Prefecture Alerts shows ads.

### Which is updated more often, KoOlis or Prefecture Alerts?

KoOlis ships an update fortnightly, and Prefecture Alerts fortnightly. Most recently, KoOlis was updated on October 11, 2026 and Prefecture Alerts on October 8, 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.*