# HydraCrimp vs Resonance

The clearest difference is in-app purchases: HydraCrimp at none against Resonance's 3. HydraCrimp also leads on update cadence (monthly vs every 4 months) and iOS requirement (13.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Resonance sells 3 in-app purchases, starting at $1.99 per month. HydraCrimp asks for nothing beyond the download.

HydraCrimp ships an update monthly, Resonance every 4 months. Both last shipped on October 10, 2026.

## The numbers

| Metric | HydraCrimp | Resonance |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/resonance/id6654889672/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | — | Free with in-app purchases |
| Size | 16 MB | 70 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HYDRAULINK FLUID CONNECTORS LIMITED](https://appshunter.io/developer/1272538158) | [Benjamin Probett](https://appshunter.io/developer/1561394321) |

## What reviewers say

### HydraCrimp

[App page](https://appshunter.io/ios/app/hydracrimp/id1272538159)

**Features:** macOS Compatibility

**In-app purchases:** none


### Resonance

[App page](https://appshunter.io/ios/app/resonance/id6654889672)

Transform your smartphone into a professional vibration analysis tool. Measure, record, and analyze vibrations in real-time with spectral analysis, on-site and quickly. Supports external Bluetooth sensors and offers powerful analysis tools for various applications.

**Highlights:** Real-time spectral analysis, Power Spectral Density (PSD) and FFT, Bluetooth sensor support, Damping ratio estimation, Export data as CSV, Generate PDF reports

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Subscription | $1.99 | per month |
| Yearly Premium Subscription | $6.99 | per year |
| Lifetime Access - Pro Features | $6.99 | one-time |


## Frequently asked questions

### Is HydraCrimp free?

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

### Is Resonance free?

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

### Do HydraCrimp or Resonance have ads?

Neither HydraCrimp nor Resonance shows ads.

### Which is updated more often, HydraCrimp or Resonance?

HydraCrimp ships an update monthly, and Resonance every 4 months. Most recently, HydraCrimp was updated on October 10, 2026 and Resonance on October 10, 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.*