# Vibration analysis vs iSIU

The clearest difference is in-app purchases: iSIU at none against Vibration analysis's 2. iSIU also leads on update cadence (daily vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

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

Vibration analysis ships an update every 3 months, iSIU daily. The most recent releases landed on October 14, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Vibration analysis | iSIU |
| --- | --- | --- |
| 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 | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 61 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dmitriy Kharutskiy](https://appshunter.io/developer/817385891) | [Green Grid Inc.](https://appshunter.io/developer/1715784766) |

## 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 |


### iSIU

[App page](https://appshunter.io/ios/app/isiu/id6471646259)

**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 iSIU free?

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

### Do Vibration analysis or iSIU have ads?

Neither Vibration analysis nor iSIU shows ads.

### Which is updated more often, Vibration analysis or iSIU?

Vibration analysis ships an update every 3 months, and iSIU daily. Most recently, Vibration analysis was updated on October 14, 2026 and iSIU on September 29, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*