# Itz. vs RetaPro

The clearest difference is in-app purchases: Itz. at none against RetaPro's 2. Itz. also leads on update cadence (every 2 weeks vs every 2 months). RetaPro's advantage is device support (3 vs 1) and iOS requirement (15.5 vs 18.0). On price and ads there is nothing between them.

Both are free to download. RetaPro sells 2 in-app purchases, starting at $39.99 per year. Itz. asks for nothing beyond the download.

Itz. ships an update every 2 weeks, RetaPro every 2 months. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Itz. | RetaPro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (45 ratings)](https://appshunter.io/ios/app/retapro-retatrutide-tracker/id6772027026/reviews)** |
| Number of ratings | — | **45** |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 10 MB | 103 MB |
| Requires iOS | 18.0 | **15.5** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | +4 | 17+ |
| Developer | [Marfin LABS](https://appshunter.io/developer/1893964908) | [Agora Labs Ltda.](https://appshunter.io/developer/1846683084) |

## What reviewers say

### Itz.

[App page](https://appshunter.io/ios/app/itz/id6762371882)

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

**In-app purchases:** none


### RetaPro

[App page](https://appshunter.io/ios/app/retapro-retatrutide-tracker/id6772027026)

This app helps users meticulously track their retatrutide treatment. It logs doses, manages vials, calculates reconstitutions, and monitors progress with features like meal logging and weight tracking. Smart reminders ensure no dose is missed.

**Highlights:** Retatrutide dose logging, Vial volume monitoring, Reconstitution calculation, Protocol and cycle tracking, Personalized meal logging, Weight and progress photo tracking, Smart injection reminders

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Plan | $39.99 | per year |
| Lifetime Plan | $39.99 | one-time |


## Frequently asked questions

### Is Itz. free?

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

### Is RetaPro free?

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

### Do Itz. or RetaPro have ads?

Neither Itz. nor RetaPro shows ads.

### Which is updated more often, Itz. or RetaPro?

Itz. ships an update every 2 weeks, and RetaPro every 2 months. Most recently, Itz. was updated on October 21, 2026 and RetaPro on October 25, 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.*