# WhatTheBug vs Caterpillar Identifier－Scan AI

The clearest difference is iOS requirement: Caterpillar Identifier－Scan AI at 16.0 against WhatTheBug's 26.2. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. WhatTheBug sells 2 in-app purchases, starting at $2.99 per month and Caterpillar Identifier－Scan AI sells 2 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

WhatTheBug ships an update every 2 months, Caterpillar Identifier－Scan AI every 5 weeks. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | WhatTheBug | Caterpillar Identifier－Scan AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/caterpillar-identifierscan-ai/id6769721955/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 5 MB | 10 MB |
| Requires iOS | 26.2 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tomas Hustoles](https://appshunter.io/developer/1876267624) | [Rudenko Andrii](https://appshunter.io/developer/1858246209) |

## What reviewers say

### WhatTheBug

[App page](https://appshunter.io/ios/app/whatthebug-insect-identifier/id6759799374)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WhatTheBug Pro | $2.99 | per month |
| Unlock This Bug | $0.99 | one-time |


### Caterpillar Identifier－Scan AI

[App page](https://appshunter.io/ios/app/caterpillar-identifierscan-ai/id6769721955)

Instantly identify caterpillars and larvae from a photo using AI. Get detailed insights on species, host plants, behavior, and safety. Explore the hidden world of insects with interactive learning and follow-up questions.

**Highlights:** Instant AI caterpillar identification, Detailed species overviews, Host plant and habitat information, Safety and handling guidance, Integrated AI chat for follow-up questions, Lifecycle and ecology insights

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Caterpillar Identifier Premium | $2.99 | per 7 days |
| Caterpillar Identifier Premium | $19.99 | per year |


## Frequently asked questions

### Is WhatTheBug free?

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

### Is Caterpillar Identifier－Scan AI free?

Caterpillar Identifier－Scan AI is free to download, with in-app purchases available.

### Do WhatTheBug or Caterpillar Identifier－Scan AI have ads?

Neither WhatTheBug nor Caterpillar Identifier－Scan AI shows ads.

### Which is updated more often, WhatTheBug or Caterpillar Identifier－Scan AI?

WhatTheBug ships an update every 2 months, and Caterpillar Identifier－Scan AI every 5 weeks. Most recently, WhatTheBug was updated on October 31, 2026 and Caterpillar Identifier－Scan AI on November 5, 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.*