# Vibration analysis vs Retime Calc

The clearest difference is price: Vibration analysis at Free against Retime Calc's $2.99. Vibration analysis also leads on iOS requirement (15.6 vs 17.6). Retime Calc's advantage is in-app purchases (none vs 2) and update cadence (every 6 weeks vs every 3 months). On ads and device support there is nothing between them.

Vibration analysis is free to download; Retime Calc costs $2.99 up front. Vibration analysis sells 2 one-off in-app purchases. Retime Calc asks for nothing beyond the download.

Vibration analysis ships an update every 3 months, Retime Calc every 6 weeks. The most recent releases landed on October 22, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Vibration analysis | Retime Calc |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| 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 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 1 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Dmitriy Kharutskiy](https://appshunter.io/developer/817385891) | [Warren Hickman](https://appshunter.io/developer/1896772926) |

## 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 |


### Retime Calc

[App page](https://appshunter.io/ios/app/retime-calc/id6771155236)

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

**In-app purchases:** none


## Frequently asked questions

### Is Vibration analysis free?

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

### Is Retime Calc free?

Retime Calc costs $2.99, with no in-app purchases.

### Do Vibration analysis or Retime Calc have ads?

Neither Vibration analysis nor Retime Calc shows ads.

### Which is updated more often, Vibration analysis or Retime Calc?

Vibration analysis ships an update every 3 months, and Retime Calc every 6 weeks. Most recently, Vibration analysis was updated on October 22, 2026 and Retime Calc on September 23, 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.*