# Veterinary Notebook vs Decay Lab

The clearest difference is price: Decay Lab at Free against Veterinary Notebook's $1.99. Decay Lab also leads on update cadence (every 4 days vs every 3 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Decay Lab is free to download; Veterinary Notebook costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Veterinary Notebook ships an update every 3 months, Decay Lab every 4 days. The most recent releases landed on May 14, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Veterinary Notebook | Decay Lab |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Size | 1 MB | 6 MB |
| Requires iOS | 17.5 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Summer Youngberg](https://appshunter.io/developer/1766803882) | [Carlos Uribe](https://appshunter.io/developer/1818871232) |

## What reviewers say

### Veterinary Notebook

[App page](https://appshunter.io/ios/app/veterinary-notebook/id6736726768)

**Features:** macOS Compatibility

**In-app purchases:** none


### Decay Lab

[App page](https://appshunter.io/ios/app/decay-lab/id6746874842)

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

**In-app purchases:** none


## Frequently asked questions

### Is Veterinary Notebook free?

Veterinary Notebook costs $1.99, with no in-app purchases.

### Is Decay Lab free?

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

### Do Veterinary Notebook or Decay Lab have ads?

Neither Veterinary Notebook nor Decay Lab shows ads.

### Which is updated more often, Veterinary Notebook or Decay Lab?

Veterinary Notebook ships an update every 3 months, and Decay Lab every 4 days. Most recently, Veterinary Notebook was updated on May 14, 2026 and Decay Lab on October 2, 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.*