# PepCal vs Veterinary Notebook

The clearest difference is chart position: PepCal at #195 against Veterinary Notebook's unranked. PepCal also leads on update cadence (every 6 weeks vs every 3 months) and iOS requirement (15.0 vs 17.5). Veterinary Notebook's advantage is price ($1.99 vs $2.99). On ads, in-app purchases and device support there is nothing between them.

PepCal costs $2.99 and Veterinary Notebook $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PepCal ships an update every 6 weeks, Veterinary Notebook every 3 months. The most recent releases landed on October 20, 2026 and May 14, 2026 respectively.

## The numbers

| Metric | PepCal | Veterinary Notebook |
| --- | --- | --- |
| Price | $2.99 | **$1.99** |
| Rating | **[4.3 (36 ratings)](https://appshunter.io/ios/app/pepcal-peptide-calculator/id6467717437/reviews)** | — |
| Number of ratings | **36** | — |
| Positive reviews | 79.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | Free | — |
| Best chart rank | **#195** | — |
| Size | 7 MB | 1 MB |
| Requires iOS | **15.0** | 17.5 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [A & A Design Inc.](https://appshunter.io/developer/1222491747) | [Summer Youngberg](https://appshunter.io/developer/1766803882) |

## What reviewers say

### PepCal

[App page](https://appshunter.io/ios/app/pepcal-peptide-calculator/id6467717437)

**Currently charting:** #195 Top Paid · Utilities (US App Store)

This ad-free tool assists scientists and researchers with peptide reconstitution and mixing. It provides guidelines for calculating water requirements and exploring mixing ratios for peptide sequences. The app features an intuitive interface, dark mode, and the ability to save favorite calculations.

**Highlights:** Peptide reconstitution calculations, Mixing ratio exploration, Bacteriostatic water calculations, Intuitive user interface, Dark mode support, Save favorite calculations

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

**In-app purchases:** none


### Veterinary Notebook

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PepCal free?

PepCal costs $2.99, with no in-app purchases.

### Is Veterinary Notebook free?

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

### Do PepCal or Veterinary Notebook have ads?

Neither PepCal nor Veterinary Notebook shows ads.

### Which is updated more often, PepCal or Veterinary Notebook?

PepCal ships an update every 6 weeks, and Veterinary Notebook every 3 months. Most recently, PepCal was updated on October 20, 2026 and Veterinary Notebook on May 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.*