# eButterfly vs PenIt AI

The clearest difference is in-app purchases: eButterfly at none against PenIt AI's 5. eButterfly also leads on iOS requirement (13.4 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PenIt AI sells 5 in-app purchases, starting at $6.99 per month. eButterfly asks for nothing beyond the download.

eButterfly ships an update fortnightly, PenIt AI every 9 days. The most recent releases landed on October 5, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | eButterfly | PenIt AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (3 ratings)](https://appshunter.io/ios/app/ebutterfly/id6457416905/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 9 days** |
| Monetization | Free | — |
| Size | 48 MB | 4 MB |
| Requires iOS | **13.4** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [THE VERMONT CENTER FOR ECOSTUDIES, INC.](https://appshunter.io/developer/1700941440) | [Jim Mayers](https://appshunter.io/developer/1850813452) |

## What reviewers say

### eButterfly

[App page](https://appshunter.io/ios/app/ebutterfly/id6457416905)

Record and share your butterfly sightings for scientific research and conservation. This free app uses AI to help identify butterflies and contributes your observations to a global database.

**Highlights:** AI-powered butterfly identification, Record and share sightings, Contribute to scientific research, Global biodiversity database, Track life lists, Multilingual support

**Features:** macOS Compatibility

**In-app purchases:** none


### PenIt AI

[App page](https://appshunter.io/ios/app/penit-ai/id6788761925)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PenIt AI Pro Monthly | $6.99 | per month |
| Basic | $7.99 | per month |
| PenIt AI Pro Yearly | $49.99 | per year |
| Basic | $74.99 | per year |
| Pemium | $299.99 | per year |


## Frequently asked questions

### Is eButterfly free?

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

### Is PenIt AI free?

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

### Do eButterfly or PenIt AI have ads?

Neither eButterfly nor PenIt AI shows ads.

### Which is updated more often, eButterfly or PenIt AI?

eButterfly ships an update fortnightly, and PenIt AI every 9 days. Most recently, eButterfly was updated on October 5, 2026 and PenIt AI on October 14, 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.*