# Iron vs Absorb

The clearest difference is rating: Iron at 5.0 against Absorb's 4.0. Iron also leads on in-app purchases (none vs 2) and iOS requirement (13.0 vs 16.4). Absorb's advantage is update cadence (every 5 weeks vs every 3 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Absorb sells 2 in-app purchases, starting at $9.99 per month. Iron asks for nothing beyond the download.

Iron holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Iron ships an update every 3 months, Absorb every 5 weeks. The most recent releases landed on September 21, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Iron | Absorb |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/iron-daily-supplement-tracker/id6740498847/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/absorb-supplement-stack/id6759998379/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 7 MB | 60 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [Martspec LLC](https://appshunter.io/developer/1506250419) | [Souhayb Kamal Dine](https://appshunter.io/developer/1871701232) |

## What reviewers say

### Iron

[App page](https://appshunter.io/ios/app/iron-daily-supplement-tracker/id6740498847)

Track your dietary iron intake with this simple and elegant app. It offers seamless logging, personalized schedules, smart reminders, and integrates with Apple Health. Your data is private and securely backed up via iCloud, with no ads or logins required.

**Highlights:** Seamless intake tracking, Full Apple Health integration, Automatic iCloud backups, Science-based personalization, Smart reminders, Custom daily intake schedule

**Features:** Apple Watch app

**In-app purchases:** none


### Absorb

[App page](https://appshunter.io/ios/app/absorb-supplement-stack/id6759998379)

Log your daily supplements, identify potential conflicts, and discover synergistic combinations for better absorption. Optimize your vitamin and mineral intake with research-backed guidance and personalized insights.

**Highlights:** Daily supplement logging, Conflict warnings, Synergy insights, Absorption tips, Smart reminders, Supplement library

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Absorb Pro - Monthly | $9.99 | per month |
| Absorb pro Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is Iron free?

Iron is free to download, with no in-app purchases.

### Is Absorb free?

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

### Which has better reviews, Iron or Absorb?

Iron is rated higher. Iron averages 5.0 out of 5 from 1 ratings, while Absorb averages 4.0 from 1 ratings.

### Do Iron or Absorb have ads?

Neither Iron nor Absorb shows ads.

### Which is updated more often, Iron or Absorb?

Iron ships an update every 3 months, and Absorb every 5 weeks. Most recently, Iron was updated on September 21, 2026 and Absorb on September 27, 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.*