# Vibration Alarm Clock & Timer vs Principle Centered Planner

The clearest difference is in-app purchases: Vibration Alarm Clock & Timer at none against Principle Centered Planner's 3. Principle Centered Planner's advantage is ads (none vs shown) and iOS requirement (15.1 vs 26.0). On price and device support there is nothing between them.

Both are free to download. Principle Centered Planner sells 3 in-app purchases, starting at $2.99 per month. Vibration Alarm Clock & Timer asks for nothing beyond the download.

## The numbers

| Metric | Vibration Alarm Clock & Timer | Principle Centered Planner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (73 ratings)](https://appshunter.io/ios/app/vibration-alarm-clock-and-timer/id1608801800/reviews)** | — |
| Number of ratings | **73** | — |
| Positive reviews | 41.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 45 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FugaPiyo Inc.](https://appshunter.io/developer/1497887610) | [Rassulzhan Turganov](https://appshunter.io/developer/1700622574) |

## What reviewers say

### Vibration Alarm Clock & Timer

[App page](https://appshunter.io/ios/app/vibration-alarm-clock-and-timer/id1608801800)

This app provides silent alarms and timers using only vibration. It offers quick setup, customizable presets, and repeat options for alarms. Enjoy features like background notifications and dark mode, all for free.

**Highlights:** Vibration-only alarms and timers, Unlimited preset alarms and timers, Repeat alarm by day of week, Countdown and time designation timers, Background notifications, Dark mode

**Features:** Vision Pro support

**In-app purchases:** none


### Principle Centered Planner

[App page](https://appshunter.io/ios/app/principle-centered-planner/id6757302815)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $2.99 | per month |
| Yearly Subscription | $19.99 | per year |
| Lifetime Access | $49.99 | one-time |


## Frequently asked questions

### Is Vibration Alarm Clock & Timer free?

Vibration Alarm Clock & Timer is free to download, with no in-app purchases.

### Is Principle Centered Planner free?

Principle Centered Planner is free to download, with in-app purchases available.

### Do Vibration Alarm Clock & Timer or Principle Centered Planner have ads?

Vibration Alarm Clock & Timer shows ads; Principle Centered Planner does not.

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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.*