# Vibration Meter, seismograph vs StrokeInput

The clearest difference is rating: Vibration Meter, seismograph at 4.7 against StrokeInput's 3.4. Vibration Meter, seismograph also leads on ratings volume (717 vs 8). StrokeInput's advantage is in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Vibration Meter, seismograph sells 1 one-off in-app purchase. StrokeInput asks for nothing beyond the download.

Vibration Meter, seismograph holds the better App Store score, 4.7 against 3.4. That said, the two scores are not equally well evidenced: Vibration Meter, seismograph has 717 ratings behind it against 8, so its average is the more settled of the two. Written reviews complicate that: 42% of Vibration Meter, seismograph's written reviews are positive against 50% of StrokeInput's, so the app with the better star average is not the one people write more warmly about.

Vibration Meter, seismograph ships an update every 7 months, StrokeInput every 3 weeks. The most recent releases landed on September 23, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Vibration Meter, seismograph | StrokeInput |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (717 ratings)](https://appshunter.io/ios/app/vibration-meter-seismograph/id1137580201/reviews)** | [3.4 (8 ratings)](https://appshunter.io/ios/app/strokeinput/id1604062990/reviews) |
| Number of ratings | **717** | 8 |
| Positive reviews | 41.7% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 18 MB | 14 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ExaMobile S.A.](https://appshunter.io/developer/506014841) | [Annalisa Carraro](https://appshunter.io/developer/1604060916) |

## What reviewers say

### Vibration Meter, seismograph

[App page](https://appshunter.io/ios/app/vibration-meter-seismograph/id1137580201)

This application uses your phone's accelerometer to measure and record vibrations from various sources, including earthquakes and everyday objects. It displays ground motion on a graph and uses an instrumental intensity scale for analysis. You can also monitor and share your measurement results.

**Highlights:** Measures vibration strength, Detects seismic waves, Uses accelerometer for analysis, Displays ground motion graph, Utilizes instrumental intensity scale, Monitors and shares results

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $1.99 | one-time |


### StrokeInput

[App page](https://appshunter.io/ios/app/strokeinput/id1604062990)

This app allows users to write naturally on a free field, seeing their text as they create it. It supports writing any character without switching keyboard views and offers easy cursor control. Users can also write and calculate formulas directly within the app.

**Highlights:** Write on a free field, view text as you type, Input any character without keyboard switching, Effortless cursor movement, Write and calculate formulas, Natural handwriting feel

**In-app purchases:** none


## Frequently asked questions

### Is Vibration Meter, seismograph free?

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

### Is StrokeInput free?

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

### Which has better reviews, Vibration Meter, seismograph or StrokeInput?

Vibration Meter, seismograph is rated higher. Vibration Meter, seismograph averages 4.7 out of 5 from 717 ratings, while StrokeInput averages 3.4 from 8 ratings.

### Do Vibration Meter, seismograph or StrokeInput have ads?

Neither Vibration Meter, seismograph nor StrokeInput shows ads.

### Which is updated more often, Vibration Meter, seismograph or StrokeInput?

Vibration Meter, seismograph ships an update every 7 months, and StrokeInput every 3 weeks. Most recently, Vibration Meter, seismograph was updated on September 23, 2026 and StrokeInput on June 1, 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.*