# PepSync vs Vial

The clearest difference is update cadence: Vial at every 3 days against PepSync's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PepSync sells 1 one-off in-app purchase and Vial sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

PepSync ships an update every 3 weeks, Vial every 3 days. The most recent releases landed on October 1, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | PepSync | Vial |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/vial-peptide-tracker/id6762662021/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | — | Freemium |
| Size | 39 MB | 2 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 12+ |
| Developer | [Rapid Sync IT LLC](https://appshunter.io/developer/1887127351) | [JEFFREY BLAINE HOLMAN](https://appshunter.io/developer/1894949295) |

## What reviewers say

### PepSync

[App page](https://appshunter.io/ios/app/pepsync-peptide-calculator/id6762025755)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock PepSync | $19.99 | one-time |


### Vial

[App page](https://appshunter.io/ios/app/vial-peptide-tracker/id6762662021)

This app helps you precisely manage peptide protocols by tracking inventory, logging doses, and modeling compound levels in your body over time. It also includes a wellness journal, lab result tracking, and body composition logging.

**Highlights:** Track peptide inventory and remaining amounts, Log doses with automatic inventory updates, Model compound levels in the body over time, Analyze dose frequency and intake trends, Journal mood, energy, and side effects, Store and track lab results and body composition, Reconstitution calculator for precise concentrations, Low inventory alerts

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vial Premium Monthly | $4.99 | per month |
| Vial Premium Annual | $24.99 | per 6 months |
| Vial Lifetime Access | $44.99 | one-time |


## Frequently asked questions

### Is PepSync free?

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

### Is Vial free?

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

### Do PepSync or Vial have ads?

Neither PepSync nor Vial shows ads.

### Which is updated more often, PepSync or Vial?

PepSync ships an update every 3 weeks, and Vial every 3 days. Most recently, PepSync was updated on October 1, 2026 and Vial on October 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.*