# Vibration Timer vs ParallelCalculator

The clearest difference is in-app purchases: Vibration Timer at none against ParallelCalculator's 2. ParallelCalculator's advantage is iOS requirement (15.1 vs 26.0). On price, ads and device support there is nothing between them.

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

## The numbers

| Metric | Vibration Timer | ParallelCalculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (13 ratings)](https://appshunter.io/ios/app/vibration-timer-vibrator-app/id6446075487/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 11 months | — |
| Monetization | Ad-supported | — |
| Size | 10 MB | 38 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [FugaPiyo Inc.](https://appshunter.io/developer/1497887610) | [Ryusei Wakita](https://appshunter.io/developer/1896649944) |

## What reviewers say

### Vibration Timer

[App page](https://appshunter.io/ios/app/vibration-timer-vibrator-app/id6446075487)

This utility app provides a silent timer that relies solely on vibration for notifications. It offers unlimited preset timers with customizable labels and colors, and can send strong vibration alerts even when the app is in the background. The interface supports dark mode and displays an icon badge when a timer is active.

**Highlights:** Silent vibration-only notifications, Unlimited preset timers, Customizable timer labels and colors, Background vibration alerts, Icon badge display, Dark mode support

**Features:** Vision Pro support

**In-app purchases:** none


### ParallelCalculator

[App page](https://appshunter.io/ios/app/parallelcalculator/id6769945397)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム 月額プラン | $1.99 | per month |
| プレミアム 年額プラン | $19.99 | per year |


## Frequently asked questions

### Is Vibration Timer free?

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

### Is ParallelCalculator free?

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

### Do Vibration Timer or ParallelCalculator have ads?

Both Vibration Timer and ParallelCalculator show ads.

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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.*