# Stack vs Iron Tracker

The clearest difference is update cadence: Stack at every 3 days against Iron Tracker's every 8 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Stack sells 2 in-app purchases, starting at $5.99 per month and Iron Tracker sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Stack ships an update every 3 days, Iron Tracker every 8 days. Both last shipped on September 24, 2026.

## The numbers

| Metric | Stack | Iron Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 8 days |
| Size | 9 MB | 35 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Henry Hinge](https://appshunter.io/developer/6784458312) | [Denis Kulkov](https://appshunter.io/developer/1867205516) |

## What reviewers say

### Stack

[App page](https://appshunter.io/ios/app/stack-supplement-tracker/id6784458310)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stack Pro | $5.99 | per month |
| Stack Pro | $39.99 | per year |


### Iron Tracker

[App page](https://appshunter.io/ios/app/iron-tracker-ferritin-counter/id6789063748)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Yearly | $14.99 | per year |
| Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is Stack free?

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

### Is Iron Tracker free?

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

### Do Stack or Iron Tracker have ads?

Neither Stack nor Iron Tracker shows ads.

### Which is updated more often, Stack or Iron Tracker?

Stack ships an update every 3 days, and Iron Tracker every 8 days. Most recently, Stack was updated on September 24, 2026 and Iron Tracker on September 24, 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.*