# PepX vs Vialmetry

The clearest difference is update cadence: Vialmetry at every 2 days against PepX's every 4 months. 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.

PepX ships an update every 4 months, Vialmetry every 2 days. The most recent releases landed on November 7, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | PepX | Vialmetry |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/vialmetry-peptide-calculator/id6814296316/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 days** |
| Monetization | — | Free |
| Size | 132 MB | 44 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Vinicius Ramos Pinto](https://appshunter.io/developer/1630219233) | [Crestwood Holdings Management LLC](https://appshunter.io/developer/6800386430) |

## What reviewers say

### PepX

[App page](https://appshunter.io/ios/app/pepx-peptide-tracker/id6763190667)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Vialmetry

[App page](https://appshunter.io/ios/app/vialmetry-peptide-calculator/id6814296316)

This app helps you privately track your vials, calculate dosages, log injections, and rotate sites. It offers a local-first logbook with no ads or tracking, and allows for export of your data.

**Highlights:** Record vial details (strength, water, mix date), Calculate syringe units and concentration, Log injections with amount, time, and site, Rotate subcutaneous injection sites, Schedule reminders for injections, Export data as spreadsheet or backup

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

**In-app purchases:** none


## Frequently asked questions

### Is PepX free?

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

### Is Vialmetry free?

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

### Do PepX or Vialmetry have ads?

Neither PepX nor Vialmetry shows ads.

### Which is updated more often, PepX or Vialmetry?

PepX ships an update every 4 months, and Vialmetry every 2 days. Most recently, PepX was updated on November 7, 2026 and Vialmetry on November 6, 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.*