# PeptideFox vs Vialy

The clearest difference is in-app purchases: Vialy at none against PeptideFox's 2. Vialy also leads on update cadence (every 2 days vs weekly). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. PeptideFox sells 2 in-app purchases, starting at $2.99 per month. Vialy asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for PeptideFox against 5.0 for Vialy. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

PeptideFox ships an update weekly, Vialy every 2 days. The most recent releases landed on October 12, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | PeptideFox | Vialy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/peptidefox/id6758572242/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/vialy-peptide-tracker/id6768241513/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 2 days** |
| Monetization | Free | Free |
| Size | 14 MB | 15 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [HZ29 Inc.](https://appshunter.io/developer/1873736740) | [Lunium AB](https://appshunter.io/developer/1857989339) |

## What reviewers say

### PeptideFox

[App page](https://appshunter.io/ios/app/peptidefox/id6758572242)

This app simplifies peptide math and tracking for users managing peptide protocols. It calculates precise dosages, logs daily injections, and helps build custom protocols. Manage vial inventory and track multiple peptides simultaneously for optimal results.

**Highlights:** Reconstitution calculator, Daily dose and injection log, Custom protocol management, Vial inventory tracking, Supports various peptide compounds, Private and secure data storage

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $2.99 | per month |
| Pro Yearly | $19.99 | per year |


### Vialy

[App page](https://appshunter.io/ios/app/vialy-peptide-tracker/id6768241513)

This app helps adults using prescribed peptides track their doses, manage protocols, and log injections. It calculates concentrations and units, plans injection schedules, and tracks vial usage. A reference library and dose reminders are included.

**Highlights:** Live dose and concentration calculation, Customizable protocol planning, Body map injection logging, Vial usage and cost tracking, Built-in peptide reference library, Dose reminders, Data export (JSON/CSV)

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

**In-app purchases:** none


## Frequently asked questions

### Is PeptideFox free?

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

### Is Vialy free?

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

### Which has better reviews, PeptideFox or Vialy?

PeptideFox and Vialy are both rated 5.0 out of 5 on the App Store, from 3 and 2 ratings respectively.

### Do PeptideFox or Vialy have ads?

Neither PeptideFox nor Vialy shows ads.

### Which is updated more often, PeptideFox or Vialy?

PeptideFox ships an update weekly, and Vialy every 2 days. Most recently, PeptideFox was updated on October 12, 2026 and Vialy on October 15, 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.*