# The Peptide App vs Shift Fuel

The clearest difference is in-app purchases: The Peptide App at none against Shift Fuel's 2. The Peptide App also leads on update cadence (every 5 days vs every 5 months) and iOS requirement (16.0 vs 26.4). On price, ads and device support there is nothing between them.

Both are free to download. Shift Fuel sells 2 in-app purchases, starting at $2.99 per month. The Peptide App asks for nothing beyond the download.

The Peptide App ships an update every 5 days, Shift Fuel every 5 months. The most recent releases landed on November 13, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | The Peptide App | Shift Fuel |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (121 ratings)](https://appshunter.io/ios/app/the-peptide-app-tracker/id6756695162/reviews)** | — |
| Number of ratings | **121** | — |
| Positive reviews | 90.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 5 months |
| Monetization | Free | — |
| Size | 92 MB | 16 MB |
| Requires iOS | **16.0** | 26.4 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [The Peptide App LLC](https://appshunter.io/developer/1862367343) | [Monarch Labs Collective](https://appshunter.io/developer/1891368463) |

## What reviewers say

### The Peptide App

[App page](https://appshunter.io/ios/app/the-peptide-app-tracker/id6756695162)

This app helps you manage your peptide vials, create custom schedules with reminders, and track your progress with various health metrics. It also includes a peptide library for research and vendor price comparisons. All features are free to use.

**Highlights:** Manual vial tracking with photos and notes, Customizable schedules and reminders, Protocol and stack organization, Peptide library and research resources, Progress tracking for health metrics, Vendor price comparison

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

**In-app purchases:** none


### Shift Fuel

[App page](https://appshunter.io/ios/app/shift-fuel/id6772874868)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shift Fuel Pro Monthly | $2.99 | per month |
| Shift Fuel Pro Yearly | $14.99 | per year |


## Frequently asked questions

### Is The Peptide App free?

The Peptide App is free to download, with no in-app purchases.

### Is Shift Fuel free?

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

### Do The Peptide App or Shift Fuel have ads?

Neither The Peptide App nor Shift Fuel shows ads.

### Which is updated more often, The Peptide App or Shift Fuel?

The Peptide App ships an update every 5 days, and Shift Fuel every 5 months. Most recently, The Peptide App was updated on November 13, 2026 and Shift Fuel on November 5, 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.*