# Peptide Tracker vs VialRhythm

The clearest difference is in-app purchases: VialRhythm at none against Peptide Tracker's 12. VialRhythm also leads on ads (none vs shown) and update cadence (daily vs weekly). Peptide Tracker's advantage is ratings volume (114 vs 5). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Peptide Tracker sells 12 in-app purchases, starting at $7.99 per 7 days. VialRhythm asks for nothing beyond the download.

VialRhythm holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Peptide Tracker has 114 ratings behind it against 5, so its average is the more settled of the two.

Peptide Tracker ships an update weekly, VialRhythm daily. The most recent releases landed on October 19, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Peptide Tracker | VialRhythm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (114 ratings)](https://appshunter.io/ios/app/peptide-tracker-pepsync/id6754186869/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/vialrhythm-peptide-tracker/id6794910817/reviews)** |
| Number of ratings | **114** | 5 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Weekly | **Daily** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 41 MB | 5 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 12+ | 17+ |
| Developer | [Thomas Strathern](https://appshunter.io/developer/1785242207) | [Marc Dela Cruz](https://appshunter.io/developer/6794911119) |

## What reviewers say

### Peptide Tracker

[App page](https://appshunter.io/ios/app/peptide-tracker-pepsync/id6754186869)

This app simplifies peptide use by calculating accurate dosages, tracking injections, and setting reminders for consistency. Manage multiple peptides and review your history with a clear and reliable interface.

**Highlights:** Smart peptide calculator for accurate dosing, Log and track peptide injections, Set reminders for consistency, Review injection and dosage history, Manage multiple peptides, Designed for clarity and reliability

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $7.99 | per 7 days |
| Premium Weekly | $7.99 | per 7 days |
| PepSync Weekly | $7.99 | per 7 days |
| Premium Annual - Deal | $39.99 | per year |
| PepSync Yearly - 3 day trial | $59.99 | per year |
| PepSync Yearly - 7 day trial | $59.99 | per year |
| Premium Yearly | $59.99 | per year |
| Premium Annual | $59.99 | per year |
| Premium Annual - 3 Day Trial | $59.99 | per year |
| Premium Annual - 30 Day Trial | $59.99 | per year |
| Premium Lifetime | $39.99 | one-time |
| PepSync Lifetime | $59.99 | one-time |


### VialRhythm

[App page](https://appshunter.io/ios/app/vialrhythm-peptide-tracker/id6794910817)

Organize your entries, view your schedule, and maintain a history with this local-first app. Features include customizable themes, a calculator for transparent arithmetic, and iPhone-specific integrations like widgets and Face ID lock.

**Highlights:** Local-first scheduling and record-keeping, Day-at-a-glance schedule view, Mark entries as completed, skipped, or missed, Customizable themes, Transparent arithmetic calculator, iPhone-specific features (widgets, Face ID)

**In-app purchases:** none


## Frequently asked questions

### Is Peptide Tracker free?

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

### Is VialRhythm free?

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

### Which has better reviews, Peptide Tracker or VialRhythm?

VialRhythm is rated higher. Peptide Tracker averages 4.8 out of 5 from 114 ratings, while VialRhythm averages 5.0 from 5 ratings.

### Do Peptide Tracker or VialRhythm have ads?

Peptide Tracker shows ads; VialRhythm does not.

### Which is updated more often, Peptide Tracker or VialRhythm?

Peptide Tracker ships an update weekly, and VialRhythm daily. Most recently, Peptide Tracker was updated on October 19, 2026 and VialRhythm on October 13, 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.*