# Grafin vs Seismoviewer

The clearest difference is rating: Grafin at 5.0 against Seismoviewer's 4.0. Grafin also leads on update cadence (every 2 months vs every 4 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

Grafin holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

Grafin ships an update every 2 months, Seismoviewer every 4 months. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Grafin | Seismoviewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/grafin/id6752789012/reviews)** | [4.0 (3 ratings)](https://appshunter.io/ios/app/seismoviewer/id6758437882/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free | Free |
| Size | 6 MB | 1 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Gleb Ragalevich](https://appshunter.io/developer/1840955736) | [HyeongRae Jo](https://appshunter.io/developer/1872940735) |

## What reviewers say

### Grafin

[App page](https://appshunter.io/ios/app/grafin/id6752789012)

This app offers a simple way to encrypt and decrypt text messages and notes locally on your device. It generates unique keys for secure communication and experimentation with coding, all while working offline and without data collection.

**Highlights:** Text encryption, Offline functionality, Local data processing, Unique key generation, Secure messaging, Coding experimentation

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

**In-app purchases:** none


### Seismoviewer

[App page](https://appshunter.io/ios/app/seismoviewer/id6758437882)

This tool helps you monitor and analyze everyday vibrations from various sources like appliances, footsteps, or industrial equipment. It displays vibration magnitude, trends, and characteristics using your smartphone's accelerometer. All data processing is done locally on your device.

**Highlights:** Identify and analyze everyday vibrations, Monitor vibration magnitude, trends, and characteristics, Utilizes smartphone accelerometer, Local data processing on device, Suitable for household, industrial, and lab environments

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

**In-app purchases:** none


## Frequently asked questions

### Is Grafin free?

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

### Is Seismoviewer free?

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

### Which has better reviews, Grafin or Seismoviewer?

Grafin is rated higher. Grafin averages 5.0 out of 5 from 2 ratings, while Seismoviewer averages 4.0 from 3 ratings.

### Do Grafin or Seismoviewer have ads?

Neither Grafin nor Seismoviewer shows ads.

### Which is updated more often, Grafin or Seismoviewer?

Grafin ships an update every 2 months, and Seismoviewer every 4 months. Most recently, Grafin was updated on October 30, 2026 and Seismoviewer on November 5, 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.*