# Vibration analysis vs Frequency Calculator

The clearest difference is in-app purchases: Frequency Calculator at none against Vibration analysis's 2. Frequency Calculator also leads on iOS requirement (13.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Vibration analysis sells 2 one-off in-app purchases. Frequency Calculator asks for nothing beyond the download.

Vibration analysis ships an update every 3 months, Frequency Calculator every 6 months. The most recent releases landed on October 14, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Vibration analysis | Frequency Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (43 ratings)](https://appshunter.io/ios/app/vibration-analysis/id817385888/reviews)** | — |
| Number of ratings | **43** | — |
| Positive reviews | 57.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 43 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dmitriy Kharutskiy](https://appshunter.io/developer/817385891) | [STAGE CODING, Travnik](https://appshunter.io/developer/1637068135) |

## What reviewers say

### Vibration analysis

[App page](https://appshunter.io/ios/app/vibration-analysis/id817385888)

This app analyzes phone accelerometer data to create a vibration spectrum. It helps evaluate vibration strength, frequency, and the rotation speed of various mechanisms like fans and motors. Useful for quality checks, malfunction detection, and balancing homemade rotating parts.

**Highlights:** Vibration spectrum analysis, Rotation speed evaluation, Mechanism quality assessment, Malfunction monitoring, Customizable FFT size, Multiple units of measurement, Peak frequency detection

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Settings | $2.99 | one-time |
| External accelerometer | $2.99 | one-time |


### Frequency Calculator

[App page](https://appshunter.io/ios/app/frequency-calculator/id1619685242)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Vibration analysis free?

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

### Is Frequency Calculator free?

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

### Do Vibration analysis or Frequency Calculator have ads?

Neither Vibration analysis nor Frequency Calculator shows ads.

### Which is updated more often, Vibration analysis or Frequency Calculator?

Vibration analysis ships an update every 3 months, and Frequency Calculator every 6 months. Most recently, Vibration analysis was updated on October 14, 2026 and Frequency Calculator on September 17, 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.*