# Vial vs Loop

The clearest difference is update cadence: Vial at every 9 days against Loop's every 2 months. Vial also leads on iOS requirement (17.0 vs 26.5). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Vial sells 3 in-app purchases, starting at $5.99 per 7 days and Loop sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Vial ships an update every 9 days, Loop every 2 months. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Vial | Loop |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/vial-peptide-and-glp-1-tracker/id6762545088/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Monetization | Freemium | — |
| Size | 14 MB | 37 MB |
| Requires iOS | **17.0** | 26.5 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Arvion Holdings LLC](https://appshunter.io/developer/1894617952) | [ROK POPOVIC](https://appshunter.io/developer/6778476196) |

## What reviewers say

### Vial

[App page](https://appshunter.io/ios/app/vial-peptide-and-glp-1-tracker/id6762545088)

Log peptide doses, visualize plasma concentration curves in real-time, and manage cycles with curated protocols. Track inventory, rotate injection sites, and access contextual guidance. Designed for serious research with a private-first approach, keeping all data on your device.

**Highlights:** Log doses in seconds, Real-time plasma concentration visualization, Curated protocol templates, Inventory and reconstitution calculator, Injection site rotation map, Context-aware peptide guidance, Home screen widgets and Siri integration

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vial Pro Weekly | $5.99 | per 7 days |
| Vial Pro Monthly | $9.99 | per month |
| Vial Pro Annual | $59.99 | per year |


### Loop

[App page](https://appshunter.io/ios/app/loop-peptide-tracker/id6778476194)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Loop Pro - Monthly | $9.99 | per month |
| Loop Pro - Yearly Offer | $29.99 | per year |
| Loop Pro - Yearly | $39.99 | per year |


## Frequently asked questions

### Is Vial free?

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

### Is Loop free?

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

### Do Vial or Loop have ads?

Neither Vial nor Loop shows ads.

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

Vial ships an update every 9 days, and Loop every 2 months. Most recently, Vial was updated on October 24, 2026 and Loop 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.*