# Cliff Height Timer

> Physics-based tool to calculate vertical distances by timing object fall. (iPhone/iPad app by Mark Rober.)

- Source: https://appshunter.io/ios/app/cliff-height-timer/id893030245 (this page in markdown: same URL + `.md`)
- Developer: [Mark Rober](https://appshunter.io/developer/554776721)
- Category: Utilities
- Price: Free
- Rating: 4.61/5 from 178 App Store ratings · 58 written reviews indexed
- Age rating: 4+
- Requires: iOS 6.0 · 1 MB
- Languages: English
- Released: 2014-07-06
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/cliff-height-timer/id893030245/reviews.md

## What is Cliff Height Timer?

This is a very simple app that uses basic physics to tell you the height of a cliff or the depth of a well.  All you do is time how long it takes for the object to hit the ground and let science do the rest.  You can even measure the height of a cliff from the ground if you throw a rock right up to the top and start timing at the apex.  This app was created by Science/Design/Creativity YouTuber Mark Rober.

## Key features

- Calculate cliff height
- Calculate well depth
- Uses basic physics
- Time object fall
- Simple interface

## Recent user reviews (10 of 58)

All indexed reviews: https://appshunter.io/ios/app/cliff-height-timer/id893030245/reviews.md

### 2/5 — Needs to be updated

*2024-07-17*

I am unable to use the app because “The developer of this app needs to update the app for it to be suitable for my phone’s IOS” or something. Very disappointing as I know how great this app is.

### 5/5 — Please update

*2024-04-09*

I’m trying to download the app but it says the developer needs to update the app to work on my IPhone 11mini even though it should work but it’s still not working. So pretty please update the app. Please?

### 1/5 — Got message that the app doesn’t work with iOS 16.6

*2023-08-27*

And the link for app support takes me to a weird costume website-

Clean it up guys, come on Mark, everything else you (guys) are doing is first class!
Mike

### 4/5 — Please update

*2023-06-12*

It’s an amazing app I am sure but it will not work on my iPhone 😑

### 1/5 — No longer usable

*2023-02-11, version 1.0*

Hasn’t been updated. It’s a shame. Was a nice app

### 1/5 — Needs updated

*2022-01-24, version 1.0*

I cannot download the app with my newer phone, the app needs updating

### 5/5 — Very nice app

*2021-11-27, version 1.0*

Convenient to estimate height, please update it to work with latest iOS versions

### 5/5 — Not working with iOS15

*2021-10-31*

Fantastic app that I have used many times. 
Since upgrading to a new iPhone13pro phone with iOS15.0.1 the app will not load with the note that the app developer needs to update the app. Mark please upgrade it. 
Many thanks, keep up your good work.

### 5/5 — Please Update for Your Fans :)

*2021-09-15, version 1.0*

Hi Mark! Big fan here trying to use Cliff Height Timer on my iPod Touch but the app says the developer needs to make updates. Can you please please?!?

Thank you!!!
Ryan

### 3/5 — Needs updating

*2021-08-28*

Love the app but no longer works needs to be updated

## Frequently asked questions about Cliff Height Timer

### What does the Cliff Height Timer app do?

This app uses basic physics principles to calculate the height of a cliff or the depth of a well. You achieve this by timing how long it takes for an object to fall to the ground.

### How do I use the Cliff Height Timer?

The primary method is to time the duration of an object's fall. For instance, you can drop an object from the top of a cliff and time its descent. The app then uses this time and scientific formulas to provide the height.

### Is the Cliff Height Timer app free to use?

Yes, the Cliff Height Timer app is completely free to use. It does not have any in-app purchases or advertisements, making it a straightforward utility.

### What kind of measurements can I take with this app?

You can measure vertical distances such as the height of cliffs or the depth of wells. It's also possible to measure the height of a cliff from the ground by throwing a rock upwards and timing its fall from the apex.

## Version history (last 1 release)

### 1.0 — 2014-07-06

No release notes.

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## More apps by Mark Rober

- [Morph DigitalDudz](https://appshunter.io/ios/app/morph-digitaldudz/id554776718)

All apps by Mark Rober: https://appshunter.io/developer/554776721

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*