# Baltic Blender vs Retra UWT

The clearest difference is review sentiment: Retra UWT at 100% against Baltic Blender's 38%. Retra UWT also leads on in-app purchases (none vs 2) and iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Baltic Blender sells 2 one-off in-app purchases. Retra UWT asks for nothing beyond the download.

Baltic Blender ships an update every 4 months, Retra UWT every 3 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Baltic Blender | Retra UWT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/retra-uwt/id1472741374/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 38.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 7 MB | 51 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Eskil Olsen](https://appshunter.io/developer/304464486) | [Retra UWT, Ltd.](https://appshunter.io/developer/1472741373) |

## What reviewers say

### Baltic Blender

[App page](https://appshunter.io/ios/app/baltic-blender/id511697085)

This app assists technical divers in accurately blending gases for SCUBA diving using advanced real gas models. It performs complex calculations for partial-pressure techniques, supporting nitrox and optional trimix upgrades. The tool aids in precise gas mixture creation, emphasizing safety and accuracy in diving preparations.

**Highlights:** Nitrox blending, Trimix blending (in-app purchase), Volume and pricing calculations (in-app purchase), Real gas law (GERG-2004), Metric and imperial units, Simultaneous cylinder work, Bill printing/emailing

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Trimix | $4.99 | one-time |
| Volumes & Pricing | $4.99 | one-time |


### Retra UWT

[App page](https://appshunter.io/ios/app/retra-uwt/id1472741374)

This app connects to compatible flash devices, allowing users to monitor usage statistics, receive firmware updates, and access user manuals. It serves as a comprehensive tool for managing and maintaining your flash hardware.

**Highlights:** Connect to Retra Flash devices, View usage statistics, Receive firmware updates, Access user manuals, Device management

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Baltic Blender free?

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

### Is Retra UWT free?

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

### Do Baltic Blender or Retra UWT have ads?

Neither Baltic Blender nor Retra UWT shows ads.

### Which is updated more often, Baltic Blender or Retra UWT?

Baltic Blender ships an update every 4 months, and Retra UWT every 3 months. Most recently, Baltic Blender was updated on October 23, 2026 and Retra UWT on October 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.*