# Baltic Blender vs AOI

The clearest difference is in-app purchases: AOI at none against Baltic Blender's 2. AOI also leads on update cadence (every 10 days vs every 4 months) and iOS requirement (11.0 vs 17.0). On price, ads and device support there is nothing between them.

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

Baltic Blender ships an update every 4 months, AOI every 10 days. The most recent releases landed on October 23, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Baltic Blender | AOI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 38.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 32 MB |
| Requires iOS | 17.0 | **11.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Eskil Olsen](https://appshunter.io/developer/304464486) | [AOI-UW LIMITED](https://appshunter.io/developer/1797477814) |

## 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 |


### AOI

[App page](https://appshunter.io/ios/app/aoi-uw/id6742219314)

**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 AOI free?

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

### Do Baltic Blender or AOI have ads?

Neither Baltic Blender nor AOI shows ads.

### Which is updated more often, Baltic Blender or AOI?

Baltic Blender ships an update every 4 months, and AOI every 10 days. Most recently, Baltic Blender was updated on October 23, 2026 and AOI on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*