# StackTrackr vs Ligand · Peptide Tracker

The clearest difference is update cadence: StackTrackr at weekly against Ligand · Peptide Tracker's every 6 weeks. Ligand · Peptide Tracker's advantage is iOS requirement (17.6 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. StackTrackr sells 2 in-app purchases, starting at $4.99 per month and Ligand · Peptide Tracker sells 3 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

StackTrackr ships an update weekly, Ligand · Peptide Tracker every 6 weeks. The most recent releases landed on September 29, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | StackTrackr | Ligand · Peptide Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/stacktrackr-peptide-tracker/id6759632056/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 6 weeks |
| Monetization | Freemium | — |
| Size | 59 MB | 12 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [PeakHaus Fitness LLC](https://appshunter.io/developer/1879898877) | [Vytautas Jazbutis](https://appshunter.io/developer/1829284015) |

## What reviewers say

### StackTrackr

[App page](https://appshunter.io/ios/app/stacktrackr-peptide-tracker/id6759632056)

This app helps manage hormone therapy, peptide protocols, and research compounds. It calculates doses, tracks injections, manages vial inventory, and builds custom schedules. Log doses quickly from your watch or widgets, and access a database of verified compounds.

**Highlights:** Reconstitution calculator, Dose tracking and logging, Multi-compound protocol management, Vial inventory management, Streak tracking, Verified compound database, Apple Health integration

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro — Monthly | $4.99 | per month |
| Pro — 6 Months | $24.99 | per 6 months |


### Ligand · Peptide Tracker

[App page](https://appshunter.io/ios/app/ligand-peptide-tracker/id6764633373)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly · Unlimited + Export | $7.99 | per month |
| Yearly · Unlimited + Export | $59.99 | per year |
| Lifetime · Unlimited + Export | $79.99 | one-time |


## Frequently asked questions

### Is StackTrackr free?

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

### Is Ligand · Peptide Tracker free?

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

### Do StackTrackr or Ligand · Peptide Tracker have ads?

Neither StackTrackr nor Ligand · Peptide Tracker shows ads.

### Which is updated more often, StackTrackr or Ligand · Peptide Tracker?

StackTrackr ships an update weekly, and Ligand · Peptide Tracker every 6 weeks. Most recently, StackTrackr was updated on September 29, 2026 and Ligand · Peptide Tracker on September 26, 2026.

---

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