# Vialmetry vs Stax

The clearest difference is in-app purchases: Vialmetry at none against Stax's 4. Stax's advantage is ratings volume (11 vs 1). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Stax sells 4 in-app purchases, starting at $6.99 per month. Vialmetry asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Vialmetry against 5.0 for Stax. That said, the two scores are not equally well evidenced: Stax has 11 ratings behind it against 1, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 2 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Vialmetry | Stax |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/vialmetry-peptide-calculator/id6814296316/reviews) | [5.0 (11 ratings)](https://appshunter.io/ios/app/stax-peptide-tracker/id6818569355/reviews) |
| Number of ratings | 1 | **11** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 days | Every 2 days |
| Monetization | — | Freemium |
| Size | 44 MB | 64 MB |
| Requires iOS | 16.4 | 16.4 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Crestwood Holdings Management LLC](https://appshunter.io/developer/6800386430) | [FARSHID ORAK](https://appshunter.io/developer/6818569357) |

## What reviewers say

### Vialmetry

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

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

**In-app purchases:** none


### Stax

[App page](https://appshunter.io/ios/app/stax-peptide-tracker/id6818569355)

Automate your peptide routine with daily tracking, vial countdowns, and injection spot rotation. Log doses, supplements, and track progress with a shareable doctor's report. Designed for privacy with no account required.

**Highlights:** Automated peptide routine tracking, Vial and supply countdowns, Injection spot rotation, Supplement organizer, Shareable doctor's report, Private by design, no account needed

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stax Plus Monthly | $6.99 | per month |
| Stax Plus Annual | $59.99 | per year |
| 14-day Trial | Free | one-time |
| Stax Plus Lifetime | $149.99 | one-time |


## Frequently asked questions

### Is Vialmetry free?

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

### Is Stax free?

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

### Which has better reviews, Vialmetry or Stax?

Vialmetry and Stax are both rated 5.0 out of 5 on the App Store, from 1 and 11 ratings respectively.

### Do Vialmetry or Stax have ads?

Neither Vialmetry nor Stax shows ads.

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

Vialmetry ships an update every 2 days, and Stax every 2 days. Most recently, Vialmetry was updated on October 31, 2026 and Stax on October 31, 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.*