# geotimescale 2

> Reference app for Earth's geologic time scale with dates and historical events. (iPhone/iPad app by DK Tasa, Inc..)

- Source: https://appshunter.io/ios/app/geotimescale-2/id1050762680 (this page in markdown: same URL + `.md`)
- Developer: [DK Tasa, Inc.](https://appshunter.io/developer/1445438605)
- Category: Education, Reference
- Price: Free
- Rating: 4.50/5 from 10 App Store ratings · 6 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.4 · 8 MB
- Languages: American English
- Released: 2015-10-30
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/geotimescale-2/id1050762680/reviews.md

## What is geotimescale 2?

Now a Universal app for iOS 9.

Need a quick reference to the geologic time scale of Earth's history? Find out, for example, when dinosaurs ruled the world or when reptiles first appeared. This is an excellent reference for students, educators, professional geologists, or anyone interested in geology.

EASY TO USE:
This is an easy, quick way to get the names and numerical dates of each of the eons, eras, periods, epochs, and ages. Just select which view you want and then scroll through the time scale.

COMPLETELY SELF-CONTAINED:
No internet connection required. Ideal for field use.

TWO DIFFERENT VIEWS FEATURED:
The Geologic Time Scale Without Ages shows the names of eons, eras, periods, and epochs and their corresponding dates. Touching the With Ages button adds the names of the ages within the epochs along with their corresponding dates. Information icons appear at several points on the scale. Touching each of these icons reveals additional information about which phenomenon occurred at that time such as the extinction of the dinosaurs at 66 Ma.

## Key features

- Geologic time scale reference
- Eons, eras, periods, epochs, and ages
- Numerical dates for time divisions
- Information on historical phenomena
- Offline access
- Two different view options

## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/geotimescale-2/id1050762680/reviews.md

### 5/5 — Great quick reference

*2022-04-28, version 1.1*

Great little app for the basics. A quick look at the geological tome scale and a few key biological events.  
Nothing too in depth. Which is fine if all you want is a reference

### 1/5 — Stink

*2021-08-25, version 1.1*

This app stink

### 5/5 — Wonderful app

*2020-02-11, version 1.1*

Perfect app for its purpose. I use it frequently.  I keep hoping that the developer will produce a “deluxe” edition (paid version) that will let users click a geologic time unit to find out more, e.g. what defines that era, representative fossil images, history of discovery/naming, suggestions for additional reading, etc.).

### 5/5 — Great app!

*2016-12-08, version 1.1*

I received my degree in Geology and I love using this app! It's hard to remember the dates of things, but this app really helps. It's very easy to use. Highly suggest to all professional and amateur geologists.

### 5/5 — Great App

*2016-01-13, version 1.1*

Great reference to have, offers good information. I'm glad this app has been updated and works now. The scale is intuitive and easy to use while still offering interesting information such as origins and evolution of life

### 3/5 — Disappointed.

*2015-11-12, version 1.0*

Disappointed. Gives dates for eons, eras, periods, epochs and ages. And gives some tips on what world was like in some. Does not give meanings or origins of names or more importantly what changes occurred to necessitate a name change. Names without context are meaningless.

## Frequently asked questions about geotimescale 2

### What is the learning methodology used by geotimescale 2?

geotimescale 2 utilizes a reference-based learning methodology. It provides users with a structured overview of Earth's geologic history, allowing them to explore eons, eras, periods, epochs, and ages with their associated dates and significant events.

### How does geotimescale 2 track user progress?

geotimescale 2 does not feature explicit progress tracking. It functions as a self-contained reference tool, enabling users to access and review geological information at their convenience without requiring account creation or progress monitoring.

### Does geotimescale 2 offer certifications?

No, geotimescale 2 does not offer any certifications. Its purpose is to serve as an educational reference tool for understanding the geologic time scale, not as a platform for formal accreditation or assessment.

### What is the update frequency for geotimescale 2?

The latest version of geotimescale 2 was released on December 19, 2015. While the app is noted as a Universal app for iOS 9, there is no indication of frequent updates beyond its initial release and minor version adjustments.

### Is geotimescale 2 suitable for all ages?

geotimescale 2 has an age rating of 4+. This suggests it is appropriate for a wide range of users, including younger students, due to its straightforward presentation of geological information.

### What devices support geotimescale 2?

geotimescale 2 is a Universal app and supports iPhone, iPad, and iPod devices, making it accessible across a broad spectrum of Apple mobile hardware.

### Does geotimescale 2 contain advertisements?

No, geotimescale 2 does not contain advertisements. The app is completely self-contained and free to use without any ad interruptions.

### What is the user sentiment like for geotimescale 2?

geotimescale 2 has received a rating of 4.5 stars from 10 ratings. This indicates generally positive user sentiment, with users appreciating its ease of use and comprehensive reference material.

## Version history (last 2 releases)

### 1.1 — 2015-12-19

This app has been updated by Apple to display the Apple Watch app icon.

Updated the time scale to use the 2015 International Commission on Stratigraphy names and dates.

### 1.0 — 2015-10-28

No release notes.

## Apps similar to geotimescale 2

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Puzzling Plates](https://appshunter.io/ios/app/puzzling-plates/id486435632) | 5.0 (1) | $1.99 | Education |
| [ICS-Timescale](https://appshunter.io/ios/app/ics-timescale/id1469322356) | 4.3 (3) | Free | Education |
| [PaleoEarth](https://appshunter.io/ios/app/paleoearth/id1358958723) | 5.0 (7) | $1.99 | Education |
| [Fourpoint - A GPA Calculator](https://appshunter.io/ios/app/fourpoint-a-gpa-calculator/id383417299) | 4.6 (513) | Free | Education |
| [Ancient Earth](https://appshunter.io/ios/app/ancient-earth/id509943912) | 4.6 (126) | $2.99 | Education |
| [StraboTools](https://appshunter.io/ios/app/strabotools/id1496239162) | 5.0 (10) | Free | Education |

## More apps by DK Tasa, Inc.

- [pangaea](https://appshunter.io/ios/app/pangaea/id338289768)
- [How to Identify Minerals](https://appshunter.io/ios/app/how-to-identify-minerals/id1017963689)
- [Plate Tectonics Visual Glossary and Atlas](https://appshunter.io/ios/app/plate-tectonics-visual-glossary-and-atlas/id1106583589)
- [Exploring Plate Boundaries](https://appshunter.io/ios/app/exploring-plate-boundaries/id1435336165)

All apps by DK Tasa, Inc.: https://appshunter.io/developer/1445438605

## Related topics

[deeptime for geology](https://appshunter.io/ios/topics/deeptime-for-geology)

---

*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 2026-06-01.*