# PeptideStack vs Vialry

The clearest difference is update cadence: Vialry at fortnightly against PeptideStack's monthly. PeptideStack's advantage is iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PeptideStack sells 3 in-app purchases, starting at $4.99 per month and Vialry sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

PeptideStack ships an update monthly, Vialry fortnightly. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | PeptideStack | Vialry |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Size | 40 MB | 17 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 12+ | 17+ |
| Developer | [Enes Koc](https://appshunter.io/developer/1876640525) | [Mitaanshu Agarwal](https://appshunter.io/developer/1896724075) |

## What reviewers say

### PeptideStack

[App page](https://appshunter.io/ios/app/peptidestack-peptide-tracker/id6763878251)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PeptideStack Premium Monthly | $4.99 | per month |
| PeptideStack Premium Annual | $29.99 | per year |
| PeptideStack Premium Lifetime | $79.99 | one-time |


### Vialry

[App page](https://appshunter.io/ios/app/vialry-injection-tracker/id6771655737)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vialry Pro Monthly | $7.99 | per month |
| Vialry Pro Yearly | $39.99 | per year |


## Frequently asked questions

### Is PeptideStack free?

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

### Is Vialry free?

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

### Do PeptideStack or Vialry have ads?

Neither PeptideStack nor Vialry shows ads.

### Which is updated more often, PeptideStack or Vialry?

PeptideStack ships an update monthly, and Vialry fortnightly. Most recently, PeptideStack was updated on October 25, 2026 and Vialry on October 28, 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.*