# FLConvert vs Seismoviewer

The clearest difference is update cadence: Seismoviewer at every 4 months against FLConvert's every 10 months. Seismoviewer also leads on iOS requirement (17.6 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

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

FLConvert ships an update every 10 months, Seismoviewer every 4 months. The most recent releases landed on October 16, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | FLConvert | Seismoviewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (3 ratings)](https://appshunter.io/ios/app/seismoviewer/id6758437882/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 4 months** |
| Monetization | — | Free |
| Size | 2 MB | 1 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Michael Price](https://appshunter.io/developer/1777930667) | [HyeongRae Jo](https://appshunter.io/developer/1872940735) |

## What reviewers say

### FLConvert

[App page](https://appshunter.io/ios/app/flconvert/id6737787444)

**Features:** macOS Compatibility

**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 FLConvert free?

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

### Is Seismoviewer free?

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

### Do FLConvert or Seismoviewer have ads?

Neither FLConvert nor Seismoviewer shows ads.

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

FLConvert ships an update every 10 months, and Seismoviewer every 4 months. Most recently, FLConvert was updated on October 16, 2026 and Seismoviewer on October 11, 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.*