# Seismometer+ vs Calculator Classic Basic

Seismometer+ and Calculator Classic Basic are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Seismometer+ | Calculator Classic Basic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (82 ratings)](https://appshunter.io/ios/app/seismometer-plus/id6739265160/reviews)** | — |
| Number of ratings | **82** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | — | Every 5 days |
| Monetization | Ad-supported | — |
| Size | 3 MB | 4 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [UniCom Technology](https://appshunter.io/developer/1270764210) | [Matrix Software Co.](https://appshunter.io/developer/1457004046) |

## What reviewers say

### Seismometer+

[App page](https://appshunter.io/ios/app/seismometer-plus/id6739265160)

Transform your device into a powerful seismometer to measure and visualize vibrations in real time. Track tremors, analyze surface stability, and explore the unseen movements around you with intuitive graphical displays. Perfect for science enthusiasts and the curious.

**Highlights:** Real-time X, Y, Z axis acceleration graphs, Cumulative vibration intensity analysis, Adjustable long-term data recording intervals, Dark mode display, Customizable graph update rates and sensitivity

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

**In-app purchases:** none


### Calculator Classic Basic

[App page](https://appshunter.io/ios/app/calculator-classic-basic/id6745878564)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Seismometer+ free?

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

### Is Calculator Classic Basic free?

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

### Do Seismometer+ or Calculator Classic Basic have ads?

Both Seismometer+ and Calculator Classic Basic show ads.

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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.*