# Groundwater App vs Dinosaur Guide.

The clearest difference is in-app purchases: Groundwater App at none against Dinosaur Guide.'s 2. Groundwater App also leads on ads (none vs shown) and iOS requirement (6.0 vs 15.0). Dinosaur Guide.'s advantage is update cadence (every 3 weeks vs every 6 months) and device support (3 vs 1). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Dinosaur Guide. sells 2 in-app purchases, starting at $1.99 per month. Groundwater App asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Groundwater App against 5.0 for Dinosaur Guide.. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Groundwater App ships an update every 6 months, Dinosaur Guide. every 3 weeks. The most recent releases landed on October 10, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Groundwater App | Dinosaur Guide. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/groundwater-app/id1036868330/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/dinosaur-guide/id6746718846/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 63 MB | 212 MB |
| Requires iOS | **6.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Koboldgames GmbH](https://appshunter.io/developer/933187097) | [Olga Ivanova](https://appshunter.io/developer/1733570435) |

## What reviewers say

### Groundwater App

[App page](https://appshunter.io/ios/app/groundwater-app/id1036868330)

Explore the origins, uses, and river connections of groundwater through three engaging chapters. Conduct experiments in a virtual lab to deepen your understanding of groundwater behavior.

**Highlights:** Three learning chapters, Groundwater origins explained, Groundwater uses detailed, Link between groundwater and rivers, Virtual groundwater lab, Interactive experiments

**Features:** macOS Compatibility

**In-app purchases:** none


### Dinosaur Guide.

[App page](https://appshunter.io/ios/app/dinosaur-guide/id6746718846)

Explore prehistoric species, fossil discoveries, and scientific classifications offline. This app offers structured profiles with details on size, diet, habitat, and geological periods. Includes learning tools like quizzes and a glossary for enthusiasts and students.

**Highlights:** Dinosaur profiles with classifications, Fossil discovery information, Geological time period details, Offline access, Quiz mode for knowledge testing, Search and category browsing, Favorite dinosaur saving

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| dinosaurs_subscription | $1.99 | per month |
| dinosaurs_by_oliva_donation | $1.99 | one-time |


## Frequently asked questions

### Is Groundwater App free?

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

### Is Dinosaur Guide. free?

Dinosaur Guide. is free to download, with in-app purchases available.

### Which has better reviews, Groundwater App or Dinosaur Guide.?

Groundwater App and Dinosaur Guide. are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Groundwater App or Dinosaur Guide. have ads?

Dinosaur Guide. shows ads; Groundwater App does not.

### Which is updated more often, Groundwater App or Dinosaur Guide.?

Groundwater App ships an update every 6 months, and Dinosaur Guide. every 3 weeks. Most recently, Groundwater App was updated on October 10, 2026 and Dinosaur Guide. on October 15, 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.*