# PeptideIntel vs Stack

The clearest difference is update cadence: PeptideIntel at every 4 days against Stack's every 2 weeks. PeptideIntel also leads on iOS requirement (15.1 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PeptideIntel sells 2 in-app purchases, starting at $4.99 per month and Stack sells 2 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

PeptideIntel ships an update every 4 days, Stack every 2 weeks. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | PeptideIntel | Stack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/peptideintel/id6760659175/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Monetization | Freemium | — |
| Size | 50 MB | 106 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [Zachary Horn](https://appshunter.io/developer/1885567254) | [Amari Thomas](https://appshunter.io/developer/1868315587) |

## What reviewers say

### PeptideIntel

[App page](https://appshunter.io/ios/app/peptideintel/id6760659175)

This app aggregates pricing for peptides and research chemicals from over 30 vendors, allowing users to find the best prices per milligram. It also provides a research-grade encyclopedia and curated stacks for various research goals.

**Highlights:** Real-time price comparison across 30+ vendors, Normalized price per milligram, Track 1,600+ products, Build a watchlist of desired compounds, Browse curated research stacks, Research-grade peptide and SARM encyclopedia

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Price Tracking | $4.99 | per month |
| Premium Yearly | $39.99 | per year |


### Stack

[App page](https://appshunter.io/ios/app/stack-peptide-tracker/id6773488687)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stack Weekly | $9.99 | per 7 days |
| Stack Yearly | $49.99 | per year |


## Frequently asked questions

### Is PeptideIntel free?

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

### Is Stack free?

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

### Do PeptideIntel or Stack have ads?

Neither PeptideIntel nor Stack shows ads.

### Which is updated more often, PeptideIntel or Stack?

PeptideIntel ships an update every 4 days, and Stack every 2 weeks. Most recently, PeptideIntel was updated on October 31, 2026 and Stack on November 10, 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.*