# Alarmium vs OnTime Clock

The clearest difference is in-app purchases: OnTime Clock at none against Alarmium's 2. Alarmium's advantage is update cadence (every 8 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Alarmium sells 2 one-off in-app purchases. OnTime Clock asks for nothing beyond the download.

Alarmium ships an update every 8 days, OnTime Clock every 2 months. The most recent releases landed on October 28, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Alarmium | OnTime Clock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 2 months |
| Size | 8 MB | 18 MB |
| Requires iOS | 26.0 | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ravindu Wataketiya](https://appshunter.io/developer/1671339042) | [文巧 刘](https://appshunter.io/developer/1870071617) |

## What reviewers say

### Alarmium

[App page](https://appshunter.io/ios/app/alarmium/id6752128301)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Alarmium Essentials | $4.99 | one-time |
| Alarmium Plus | $9.99 | one-time |


### OnTime Clock

[App page](https://appshunter.io/ios/app/ontime-clock/id6758231595)

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

**In-app purchases:** none


## Frequently asked questions

### Is Alarmium free?

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

### Is OnTime Clock free?

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

### Do Alarmium or OnTime Clock have ads?

Neither Alarmium nor OnTime Clock shows ads.

### Which is updated more often, Alarmium or OnTime Clock?

Alarmium ships an update every 8 days, and OnTime Clock every 2 months. Most recently, Alarmium was updated on October 28, 2026 and OnTime Clock on October 11, 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.*