# ICS vs Isostasy

The clearest difference is update cadence: Isostasy at weekly against ICS's every 2 months. ICS's advantage is iOS requirement (9.0 vs 17.6). 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.

ICS ships an update every 2 months, Isostasy weekly. The most recent releases landed on October 21, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | ICS | Isostasy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/ics-timescale/id1469322356/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free | — |
| Size | 20 MB | 1 MB |
| Requires iOS | **9.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [隽轩 樊](https://appshunter.io/developer/1463394496) | [Nestor Cardozo](https://appshunter.io/developer/550960803) |

## What reviewers say

### ICS

[App page](https://appshunter.io/ios/app/ics-timescale/id1469322356)

Access authoritative geological time scale data and information on Global Boundary Stratotype Sections and Points (GSSPs). Explore charts, detailed GSSP information, and relevant statistics.

**Highlights:** Demonstration of ICS chart, Detailed GSSP information, GSSP statistics, Authoritative data service

**Features:** macOS Compatibility

**In-app purchases:** none


### Isostasy

[App page](https://appshunter.io/ios/app/isostasy/id6761372132)

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

**In-app purchases:** none


## Frequently asked questions

### Is ICS free?

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

### Is Isostasy free?

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

### Do ICS or Isostasy have ads?

Neither ICS nor Isostasy shows ads.

### Which is updated more often, ICS or Isostasy?

ICS ships an update every 2 months, and Isostasy weekly. Most recently, ICS was updated on October 21, 2026 and Isostasy 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.*