# Peptide Tracker vs Caliper

The clearest difference is monetization model: Caliper at free against Peptide Tracker's subscription. Caliper also leads on rating (5.0 vs 4.7) and review sentiment (100% vs 77%). Peptide Tracker's advantage is ratings volume (310 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Peptide Tracker sells 7 in-app purchases, starting at $3.99 per 7 days and Caliper sells 4 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Caliper holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Peptide Tracker has 310 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 77% of Peptide Tracker's written reviews are positive against 100% of Caliper's.

Peptide Tracker ships an update weekly, Caliper every 10 days. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Peptide Tracker | Caliper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (310 ratings)](https://appshunter.io/ios/app/peptide-tracker-peptidekit/id6751918022/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/caliper-glp-1-peptide-tracker/id6781884879/reviews)** |
| Number of ratings | **310** | 1 |
| Positive reviews | 77.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 10 days |
| Monetization | Subscription | **Free** |
| Size | 36 MB | 43 MB |
| Requires iOS | 18.6 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 17+ |
| Developer | [Jamal Baga](https://appshunter.io/developer/1587149921) | [IKIGAI SOFTWARE DEVELOPMENT LLC](https://appshunter.io/developer/6781884881) |

## What reviewers say

### Peptide Tracker

[App page](https://appshunter.io/ios/app/peptide-tracker-peptidekit/id6751918022)

This app helps users manage their peptide therapy journey with smart protocol management, progress tracking, and detailed journaling. It offers intelligent analytics, a built-in AI chat assistant, and a user-focused design for optimal organization and motivation.

**Highlights:** Customizable peptide protocols, Automatic shot generation, Intelligent reminder system, Weight loss and muscle growth tracking, Detailed journal entries, AI chat assistant for therapy questions

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Weekly | $3.99 | per 7 days |
| Plus Weekly | $5.99 | per 7 days |
| Plus Monthly | $9.99 | per month |
| Plus Yearly | $39.99 | per year |
| Plus Yearly | $39.99 | per year |
| Plus Yearly | $49.99 | per year |
| Plus Lifetime | $69.99 | one-time |

**What reviewers like**

- 🚀 Everything You Need in 1 app
- 👍 Great app!
- 👍 Really helpful
- 👍 Great App
- 👍 So far, so good!

**What reviewers complain about**

- 🐛 3 weeks' data disappeared
- 🐛 Wiped all my Data
- 🔔 Does not remind you

**Reported bugs**

- 3 weeks' data disappeared
- Wiped all my Data
- Notifications do not work

**Requested features**

- Build a protocol with an indefinite cycling period


### Caliper

[App page](https://appshunter.io/ios/app/caliper-glp-1-peptide-tracker/id6781884879)

Precisely track GLP-1, peptide, and compound protocols with one-tap logging and visual level curves. Monitor doses, weight, side effects, and progress privately on your device. Includes a reconstitution calculator and provider export.

**Highlights:** GLP-1 & peptide tracking, One-tap dose logging, Visual compound level curves, Weight & BMI trends, Side effect logging, Private progress photos, Reconstitution calculator

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Caliper | $7.99 | per 7 days |
| Caliper: GLP-1 Peptide Tracker | $12.99 | per month |
| Caliper: GLP-1 Peptide Tracker | $29.99 | per year |
| Caliper | $59.99 | per year |


## Frequently asked questions

### Is Peptide Tracker free?

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

### Is Caliper free?

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

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

Caliper is rated higher. Peptide Tracker averages 4.7 out of 5 from 310 ratings, while Caliper averages 5.0 from 1 ratings.

### Do Peptide Tracker or Caliper have ads?

Neither Peptide Tracker nor Caliper shows ads.

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

Peptide Tracker ships an update weekly, and Caliper every 10 days. Most recently, Peptide Tracker was updated on November 8, 2026 and Caliper 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.*