# Seismometer vs Keetec BT

The clearest difference is price: Keetec BT at Free against Seismometer's $1.99. Keetec BT also leads on update cadence (fortnightly vs every 13 months). Seismometer's advantage is iOS requirement (8.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

Keetec BT is free to download; Seismometer costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Seismometer ships an update every 13 months, Keetec BT fortnightly. The most recent releases landed on October 17, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Seismometer | Keetec BT |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[3.3 (17 ratings)](https://appshunter.io/ios/app/seismometer/id288966259/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 64.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 3 MB | 2 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [FFFF00 Agents AB](https://appshunter.io/developer/288966262) | [TSS Group a.s.](https://appshunter.io/developer/849893692) |

## What reviewers say

### Seismometer

[App page](https://appshunter.io/ios/app/seismometer/id288966259)

This app uses your device's accelerometer to detect and measure vibrations, shakes, and movements. It calculates the energy of these movements and displays them on a logarithmic scale, offering various signal filters and recording capabilities.

**Highlights:** Measure vibrations and movements, Uses device accelerometer, Calculates energy of movements, Logarithmic scale display, Signal filters, Recordings and CSV export, UDP Streaming

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Sensitive and accurate
- 👍 Great for demonstrating vibrations
- 👍 Useful for photography and audio
- 👍 Visually appealing
- 👍 Clever use of accelerometer

**What reviewers complain about**

- 🐛 Crashes frequently
- 🐛 Inaccurate readings even on flat surfaces
- 🔋 Drains battery quickly
- 🔒 No security or privacy features
- 👎 Limited functionality and customization

**Reported bugs**

- Crashes when trying to view recordings
- Unresponsive controls
- Incompatible with newer iPhone models
- Screen turns off unexpectedly

**Requested features**

- Pause and scroll back through recordings
- Save and email recorded data
- Adjustable sensitivity settings
- Richter scale or other measurement units
- Ability to record and review vibration history


### Keetec BT

[App page](https://appshunter.io/ios/app/keetec-bt/id6504369236)

**In-app purchases:** none


## Frequently asked questions

### Is Seismometer free?

Seismometer costs $1.99, with no in-app purchases.

### Is Keetec BT free?

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

### Do Seismometer or Keetec BT have ads?

Neither Seismometer nor Keetec BT shows ads.

### Which is updated more often, Seismometer or Keetec BT?

Seismometer ships an update every 13 months, and Keetec BT fortnightly. Most recently, Seismometer was updated on October 17, 2026 and Keetec BT on October 3, 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.*