# Peptide Calculator vs Peptide Stack

The clearest difference is rating: Peptide Calculator at 4.8 against Peptide Stack's 4.2. Peptide Calculator also leads on ads (none vs shown) and ratings volume (396 vs 5). Peptide Stack's advantage is update cadence (daily vs every 2 weeks). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Peptide Calculator sells 11 in-app purchases, starting at $0.99 per 7 days and Peptide Stack sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Peptide Calculator holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Peptide Calculator has 396 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 77% of Peptide Calculator's written reviews are positive against 67% of Peptide Stack's.

Peptide Calculator ships an update every 2 weeks, Peptide Stack daily. The most recent releases landed on September 23, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Peptide Calculator | Peptide Stack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (396 ratings)](https://appshunter.io/ios/app/peptide-calculator-pepflow/id6740525224/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/peptide-stack-glp-1-tracker/id6759533641/reviews) |
| Number of ratings | **396** | 5 |
| Positive reviews | **76.9% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Daily** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 135 MB | 13 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [keinois OU](https://appshunter.io/developer/1597616328) | [Brandon King](https://appshunter.io/developer/1879265719) |

## What reviewers say

### Peptide Calculator

[App page](https://appshunter.io/ios/app/peptide-calculator-pepflow/id6740525224)

Calculate peptide dosages and reconstitution accurately and quickly. Track your injections with timely reminders and live activities. Save custom formulas and sync across devices for seamless management.

**Highlights:** Peptide dosage calculation, Reconstitution guidance, Injection time tracking, Custom formula saving, Widget for daily doses, Reminders and Live Activities, iCloud sync across devices

**Features:** Family Sharing

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PepFlow PRO (Weekly) | $0.99 | per 7 days |
| PepFlow PRO (Monthly) | $2.99 | per month |
| PepFlow PRO (Weekly) | $2.99 | per 7 days |
| Peptide PRO (Weekly) | $2.99 | per 7 days |
| PepFlow PRO (Weekly) | $3.99 | per 7 days |
| PepFlow PRO (Annual) | $8.99 | per year |
| PepFlow PRO (Monthly) | $9.99 | per month |
| Peptide PRO (Annual) | $14.99 | per year |
| Peptide PRO (Annual) | $19.99 | per year |
| PepFlow PRO (Annual) | $29.99 | per year |
| Peptide PRO (Annual) | $44.99 | per year |


### Peptide Stack

[App page](https://appshunter.io/ios/app/peptide-stack-glp-1-tracker/id6759533641)

Track your GLP-1 medication doses and monitor your weight progress. This app supports various peptide medications and custom stacks, helping you manage your health journey.

**Highlights:** GLP-1 medication tracking, Weight progress monitoring, Custom peptide stack support, Dose logging, Subscription management

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $9.99 | per month |
| Annual Plan | $49.99 | per year |


## Frequently asked questions

### Is Peptide Calculator free?

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

### Is Peptide Stack free?

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

### Which has better reviews, Peptide Calculator or Peptide Stack?

Peptide Calculator is rated higher. Peptide Calculator averages 4.8 out of 5 from 396 ratings, while Peptide Stack averages 4.2 from 5 ratings.

### Do Peptide Calculator or Peptide Stack have ads?

Peptide Stack shows ads; Peptide Calculator does not.

### Which is updated more often, Peptide Calculator or Peptide Stack?

Peptide Calculator ships an update every 2 weeks, and Peptide Stack daily. Most recently, Peptide Calculator was updated on September 23, 2026 and Peptide Stack on September 15, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*