# Thunder & Lightning vs Seismoviewer

The clearest difference is rating: Thunder & Lightning at 4.9 against Seismoviewer's 4.0. Thunder & Lightning also leads on iOS requirement (8.0 vs 17.6). Seismoviewer's advantage is update cadence (every 4 months vs every 128 months) and review sentiment (100% vs 87%). 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.

Thunder & Lightning holds the better App Store score, 4.9 against 4.0. Both are backed by a comparable volume of ratings — 7 and 3 respectively. Written reviews complicate that: 87% of Thunder & Lightning's written reviews are positive against 100% of Seismoviewer's, so the app with the better star average is not the one people write more warmly about.

Thunder & Lightning ships an update every 128 months, Seismoviewer every 4 months. Both last shipped on October 31, 2026.

## The numbers

| Metric | Thunder & Lightning | Seismoviewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (7 ratings)](https://appshunter.io/ios/app/thunder-and-lightning/id287959052/reviews)** | [4.0 (3 ratings)](https://appshunter.io/ios/app/seismoviewer/id6758437882/reviews) |
| Number of ratings | **7** | 3 |
| Positive reviews | 87.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 128 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 2 MB | 1 MB |
| Requires iOS | **8.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Bryan Figler](https://appshunter.io/developer/287217534) | [HyeongRae Jo](https://appshunter.io/developer/1872940735) |

## What reviewers say

### Thunder & Lightning

[App page](https://appshunter.io/ios/app/thunder-and-lightning/id287959052)

Measure the distance to loud events like thunder, fireworks, or rocket launches by timing the visual and auditory cues. Adjust for temperature for greater accuracy and choose your preferred units. It also functions as a stopwatch, speed-of-sound calculator, and unit converter.

**Highlights:** Distance measurement to sound events, Temperature adjustment for accuracy, U.S./Imperial and metric units, Stopwatch functionality, Speed-of-sound calculator, Fahrenheit/Celsius converter

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy to use
- 💰 Free with no ads
- 🎯 Does exactly what it says
- 💡 Useful for weather watchers
- 👨‍👩‍👧‍👦 Fun for kids and families

**What reviewers complain about**

- ⏳ App was down for some time
- 👴 Dated interface/functionality
- 🤷‍♂️ Trivial or pointless to some users

**Reported bugs**

- App crash
- App does not work anymore

**Requested features**

- Option to have both miles per hour and centigrade
- Switch to a single button for lightning and thunder
- Allow typing temperature instead of slider
- Display average time and distance of records
- Use light sensor and camera for lightning detection


### 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 Thunder & Lightning free?

Thunder & Lightning 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, Thunder & Lightning or Seismoviewer?

Thunder & Lightning is rated higher. Thunder & Lightning averages 4.9 out of 5 from 7 ratings, while Seismoviewer averages 4.0 from 3 ratings.

### Do Thunder & Lightning or Seismoviewer have ads?

Neither Thunder & Lightning nor Seismoviewer shows ads.

### Which is updated more often, Thunder & Lightning or Seismoviewer?

Thunder & Lightning ships an update every 128 months, and Seismoviewer every 4 months. Most recently, Thunder & Lightning was updated on October 31, 2026 and Seismoviewer on October 31, 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.*