# Calf Keeper vs GreenBug

The clearest difference is in-app purchases: GreenBug at none against Calf Keeper's 4. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Calf Keeper sells 4 in-app purchases, starting at $5.99 per month. GreenBug asks for nothing beyond the download.

Calf Keeper ships an update every 2 weeks, GreenBug every 3 weeks. The most recent releases landed on September 23, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Calf Keeper | GreenBug |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (5 ratings)](https://appshunter.io/ios/app/calf-keeper/id6477791805/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 56 MB | 2 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [CattleSync, LLC](https://appshunter.io/developer/542917312) | [Oklahoma State University](https://appshunter.io/developer/393442180) |

## What reviewers say

### Calf Keeper

[App page](https://appshunter.io/ios/app/calf-keeper/id6477791805)

This app helps livestock owners manage their herds by tracking calf births, linking animals, and calculating calving dates. Premium features allow for custom data fields, animal scoring, photo uploads, and collaborative herd management.

**Highlights:** Calf birth tracking, Herd linking (cows, bulls), Gestation calculator, Customizable data fields, Animal scoring, Photo uploads, Collaborative herd management

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calf Keeper Plus (Monthly) | $5.99 | per month |
| Calf Keeper Pro (Monthly) | $9.99 | per month |
| Calf Keeper Plus (Yearly) | $59.99 | per year |
| Calf Keeper Pro (Yearly) | $99.99 | per year |


### GreenBug

[App page](https://appshunter.io/ios/app/greenbug/id6682915096)

**In-app purchases:** none


## Frequently asked questions

### Is Calf Keeper free?

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

### Is GreenBug free?

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

### Do Calf Keeper or GreenBug have ads?

Neither Calf Keeper nor GreenBug shows ads.

### Which is updated more often, Calf Keeper or GreenBug?

Calf Keeper ships an update every 2 weeks, and GreenBug every 3 weeks. Most recently, Calf Keeper was updated on September 23, 2026 and GreenBug on October 8, 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.*