# The Waterbug App vs Spinder

The clearest difference is review sentiment: Spinder at 100% against The Waterbug App's 88%. Spinder also leads on iOS requirement (12.0 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

The Waterbug App ships an update every 9 months, Spinder every 5 months. Both last shipped on October 10, 2026.

## The numbers

| Metric | The Waterbug App | Spinder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/spinder/id1087661289/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 87.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 5 months** |
| Monetization | Free | Free |
| Size | 59 MB | 64 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michael Sharman](https://appshunter.io/developer/926215556) | [arludo Pty Ltd](https://appshunter.io/developer/1023251086) |

## What reviewers say

### The Waterbug App

[App page](https://appshunter.io/ios/app/the-waterbug-app/id926215557)

Identify freshwater invertebrates found in Australian waterways. Assess the health of rivers, creeks, and wetlands by observing these creatures. Contribute your findings to a national citizen science program.

**Highlights:** Waterbug identification, River health assessment, Citizen science contribution, Data submission, Australian freshwater invertebrates

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

**In-app purchases:** none


### Spinder

[App page](https://appshunter.io/ios/app/spinder/id1087661289)

This educational app uses a fun, interactive game to teach users about correlated selection and how traits influence evolution. By swiping on virtual spiders, players learn about the impact of different trait values on population phenotypes.

**Highlights:** Interactive spider trait customization, Learn correlated selection concepts, Explore trait value impact on evolution, Intuitive science concept interface, Test different selection ideas

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

**In-app purchases:** none


## Frequently asked questions

### Is The Waterbug App free?

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

### Is Spinder free?

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

### Do The Waterbug App or Spinder have ads?

Neither The Waterbug App nor Spinder shows ads.

### Which is updated more often, The Waterbug App or Spinder?

The Waterbug App ships an update every 9 months, and Spinder every 5 months. Most recently, The Waterbug App was updated on October 10, 2026 and Spinder on October 10, 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.*