eButterfly vs PenIt AI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
eButterfly
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.
- AI-powered butterfly identification
- Record and share sightings
- Contribute to scientific research
- Global biodiversity database
- Track life lists
- Multilingual support
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Discover, record, and share your butterfly sightings for science and conservation. eButterfly is an ever-growing global online database of butterfly records from thousands of butterfly eButterfly (new description 5/2/24) Discover, record, and share your butterfly sightings for science and conservation. eButterfly is an ever-growing global online database of butterfly records from thousands of butterfly watchers around the world like you. This free resource allows you to easily keep track of the butterflies you see, while making your observations openly available for science, education, and conservation. eButterfly Mobile is the only mobile app that allows you to collect your sightings and store them in your eButterfly web account. Create an account to share your butterfly observations. eButterfly is free for anyone to use, thanks to the generous support of sponsoring non-profit organizations and individuals. Features 1. Snap a photo of any butterfly you encounter, and our advanced computer vision AI will help you identify it. 2. Contribute to scientific research by using our checklist survey and count methods that provide vital information for conservation action. 3. Add butterfly observations from anywhere around the world. Keep track of your life list of all the butterflies and places you've seen and access it via our web platform. 4. Use eButterfly Mobile while butterflying for incremental list keeping, counting, and aiding with identification. 5. Hundreds of thousands of observations created and identified by the eButterfly community are shared with the Global Biodiversity Information Facility (GBIF) where they are used to advance scientific understanding of biodiversity through open data and open science. 6. eButterfly is available in English, French, and Spanish, with other translations planned soon.
PenIt AI
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PRO PLAN - $3.99/month for your first 3 months, then $6.99/month - Or $49.99/year - Unlimited recordings and transcriptions - Unlimited AI summaries, quizzes, and flashcards - Cancel anytime
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Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | eButterfly | PenIt AI |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (3 ratings) — better | — |
| Positive reviews | 60.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Fortnightly | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 13.4 — better | 17.6 |
| Further details — not scored | ||
| Size | 48 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | THE VERMONT CENTER FOR ECOSTUDIES, INC. | Jim Mayers |
In-app purchases
eButterfly
No in-app purchases
PenIt AI
- PenIt AI Pro Monthly1 Month trial$6.991 Month
- Basic$7.991 Month
- PenIt AI Pro Yearly1 Year trial$49.991 Year
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- Basic$74.991 Year
- Pemium$299.991 Year
Questions
Is eButterfly free?
Is PenIt AI free?
Do eButterfly or PenIt AI have ads?
Which is updated more often, eButterfly or PenIt AI?
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