# One Space vs RetaPro

The clearest difference is in-app purchases: One Space at none against RetaPro's 2. One Space also leads on iOS requirement (13.0.0 vs 15.5). RetaPro's advantage is update cadence (monthly vs every 36 months). On price, ads and device support there is nothing between them.

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

One Space ships an update every 36 months, RetaPro monthly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | One Space | RetaPro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (48 ratings)](https://appshunter.io/ios/app/retapro-retatrutide-tracker/id6772027026/reviews)** |
| Number of ratings | — | **48** |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 36 months | **Monthly** |
| Monetization | — | Freemium |
| Size | 25 MB | 103 MB |
| Requires iOS | **13.0.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [P&S Property Investments Pty Limited](https://appshunter.io/developer/1528295320) | [Agora Labs Ltda.](https://appshunter.io/developer/1846683084) |

## What reviewers say

### One Space

[App page](https://appshunter.io/ios/app/one-space/id1528295318)

**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 allows logging doses, managing vials, calculating reconstitutions, and monitoring progress through food logging, weight tracking, and progress photos. Smart reminders ensure no dose is missed.

**Highlights:** Retatrutide dose logging, Vial management and tracking, Reconstitution and dose calculation, Protocol and cycle timeline, Personalized meal and nutrient targets, Weight and body composition monitoring, Progress photo comparison, 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 One Space free?

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

### Is RetaPro free?

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

### Do One Space or RetaPro have ads?

Neither One Space nor RetaPro shows ads.

### Which is updated more often, One Space or RetaPro?

One Space ships an update every 36 months, and RetaPro monthly. Most recently, One Space was updated on November 3, 2026 and RetaPro on November 5, 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.*