# Thunder & Lightning vs Sleep Tracker, AutoSleep

The clearest difference is iOS requirement: Thunder & Lightning at 8.0 against Sleep Tracker, AutoSleep's 16.0. 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.

## The numbers

| Metric | Thunder & Lightning | Sleep Tracker, AutoSleep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (7 ratings)](https://appshunter.io/ios/app/thunder-and-lightning/id287959052/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 87.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 128 months | — |
| Monetization | Free | — |
| Size | 2 MB | 4 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Bryan Figler](https://appshunter.io/developer/287217534) | [yajing pang](https://appshunter.io/developer/1745831534) |

## 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


### Sleep Tracker, AutoSleep

[App page](https://appshunter.io/ios/app/sleep-tracker-autosleep/id6745084582)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Thunder & Lightning free?

Thunder & Lightning is free to download, with no in-app purchases.

### Is Sleep Tracker, AutoSleep free?

Sleep Tracker, AutoSleep is free to download, with no in-app purchases.

### Do Thunder & Lightning or Sleep Tracker, AutoSleep have ads?

Neither Thunder & Lightning nor Sleep Tracker, AutoSleep shows ads.

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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.*