# Big Butterfly Count vs OpenBat

The clearest difference is update cadence: OpenBat at every 4 days against Big Butterfly Count's monthly. Big Butterfly Count's advantage is iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Big Butterfly Count ships an update monthly, OpenBat every 4 days. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Big Butterfly Count | OpenBat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (12 ratings)](https://appshunter.io/ios/app/big-butterfly-count/id658158833/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 77.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | Ad-supported | — |
| Size | 41 MB | 52 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Butterfly Conservation Trading Ltd](https://appshunter.io/developer/658158836) | [Niall Bell](https://appshunter.io/developer/1884697412) |

## What reviewers say

### Big Butterfly Count

[App page](https://appshunter.io/ios/app/big-butterfly-count/id658158833)

Participate in a national butterfly and moth survey by identifying and counting species in your local environment. Your observations contribute to understanding the health of UK wildlife. Features an identification guide and a map to view submitted sightings.

**Highlights:** Butterfly and moth identification guide, Count and submit sightings, View submitted records on a map, Contribute to wildlife research, 15-minute nature observation

**Features:** Vision Pro support

**In-app purchases:** none


### OpenBat

[App page](https://appshunter.io/ios/app/openbat/id6787886621)

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

**In-app purchases:** none


## Frequently asked questions

### Is Big Butterfly Count free?

Big Butterfly Count is free to download, with no in-app purchases.

### Is OpenBat free?

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

### Do Big Butterfly Count or OpenBat have ads?

Neither Big Butterfly Count nor OpenBat shows ads.

### Which is updated more often, Big Butterfly Count or OpenBat?

Big Butterfly Count ships an update monthly, and OpenBat every 4 days. Most recently, Big Butterfly Count was updated on October 7, 2026 and OpenBat on October 1, 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.*