# Vibration Detector vs CheckOnce

The clearest difference is price: CheckOnce at Free against Vibration Detector's $2.99. CheckOnce also leads on update cadence (every 3 months vs every 53 months). Vibration Detector's advantage is ads (none vs shown) and device support (3 vs 1). On in-app purchases there is nothing between them.

CheckOnce is free to download; Vibration Detector costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Vibration Detector ships an update every 53 months, CheckOnce every 3 months. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Vibration Detector | CheckOnce |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/vibration-detector/id1097738573/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 53 months | **Every 3 months** |
| Monetization | Paid | — |
| Size | 2 MB | 8 MB |
| Requires iOS | **16** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [文睿 李](https://appshunter.io/developer/372593992) |

## What reviewers say

### Vibration Detector

[App page](https://appshunter.io/ios/app/vibration-detector/id1097738573)

This app transforms your device into a high-grade vibration analyzer. It measures and records vibrations across three axes, offering real-time monitoring, customizable thresholds, and data logging for mechanical health analysis.

**Highlights:** Real-time vibration monitoring, Dual-threshold logic for logging and alarming, Data logging with timestamps, Stealth mode for battery saving, Multi-unit support (g, in/s, mm/s), Intuitive one-handed UI

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

**In-app purchases:** none


### CheckOnce

[App page](https://appshunter.io/ios/app/checkonce-yes-or-no/id6757259451)

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

**In-app purchases:** none


## Frequently asked questions

### Is Vibration Detector free?

Vibration Detector costs $2.99, with no in-app purchases.

### Is CheckOnce free?

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

### Do Vibration Detector or CheckOnce have ads?

CheckOnce shows ads; Vibration Detector does not.

### Which is updated more often, Vibration Detector or CheckOnce?

Vibration Detector ships an update every 53 months, and CheckOnce every 3 months. Most recently, Vibration Detector was updated on November 2, 2026 and CheckOnce on October 31, 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.*