# Devonian Lithological Database vs iGreekHolidays

The clearest difference is update cadence: iGreekHolidays at every 9 months against Devonian Lithological Database's every 30 months. Devonian Lithological Database's advantage is iOS requirement (11.0 vs 14.0). 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.

Devonian Lithological Database ships an update every 30 months, iGreekHolidays every 9 months. The most recent releases landed on October 26, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Devonian Lithological Database | iGreekHolidays |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (6 ratings)](https://appshunter.io/ios/app/igreekholidays/id317438086/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 85.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 9 months** |
| Monetization | — | Free |
| Size | 19 MB | 31 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thomas L. Moore](https://appshunter.io/developer/317330726) | [Fairy Tale Software](https://appshunter.io/developer/317436779) |

## What reviewers say

### Devonian Lithological Database

[App page](https://appshunter.io/ios/app/devonian-lithological-database/id317330723)

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

**In-app purchases:** none


### iGreekHolidays

[App page](https://appshunter.io/ios/app/igreekholidays/id317438086)

This app provides a comprehensive Greek calendar, including public holidays, religious observances, and daily name days. It also features historical "on this day" facts and fasting information.

**Highlights:** Public holidays for upcoming years, Orthodox movable and major feasts, Contact integration for birthdays and name days, On this day historical facts, Fasting days, Daily name calendar with main and alternative names, Saint index

**In-app purchases:** none


## Frequently asked questions

### Is Devonian Lithological Database free?

Devonian Lithological Database is free to download, with no in-app purchases.

### Is iGreekHolidays free?

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

### Do Devonian Lithological Database or iGreekHolidays have ads?

Neither Devonian Lithological Database nor iGreekHolidays shows ads.

### Which is updated more often, Devonian Lithological Database or iGreekHolidays?

Devonian Lithological Database ships an update every 30 months, and iGreekHolidays every 9 months. Most recently, Devonian Lithological Database was updated on October 26, 2026 and iGreekHolidays on October 23, 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.*