# Blue Notifier vs Blau

The clearest difference is rating: Blau at 5.0 against Blue Notifier's 4.0. Blau also leads on ads (none vs shown) and update cadence (monthly vs every 3 months). Blue Notifier's advantage is in-app purchases (none vs 1) and iOS requirement (15.6 vs 17.0). On price, ratings volume and device support there is nothing between them.

Both are free to download. Blau sells 1 one-off in-app purchase. Blue Notifier asks for nothing beyond the download.

Blau holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

Blue Notifier ships an update every 3 months, Blau monthly. Both last shipped on November 3, 2026.

## The numbers

| Metric | Blue Notifier | Blau |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/blue-notifier/id1546282337/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/blau-dollar-blue/id6449096046/reviews)** |
| Number of ratings | 2 | **3** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 39 MB | 13 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gabriel Yordi](https://appshunter.io/developer/938001666) | [David Walter](https://appshunter.io/developer/573155251) |

## What reviewers say

### Blue Notifier

[App page](https://appshunter.io/ios/app/blue-notifier/id1546282337)

Stay informed about the fluctuating value of the US dollar in Argentina. Track its historical changes and understand its evolution.

**Highlights:** Dollar blue rate notifications, Explore currency value evolution, Track historical changes, Finance app

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

**In-app purchases:** none


### Blau

[App page](https://appshunter.io/ios/app/blau-dollar-blue/id6449096046)

Track the real-time exchange rates for Argentina's Official Dollar and Blue Dollar. Compare rates with and without taxes, and see how they stack up against other global currencies.

**Highlights:** Real-time Official Dollar rates, Real-time Blue Dollar rates, Compare rates with and without taxes, Compare with other currencies, Argentina-focused finance tool

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip | $0.99 | one-time |


## Frequently asked questions

### Is Blue Notifier free?

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

### Is Blau free?

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

### Which has better reviews, Blue Notifier or Blau?

Blau is rated higher. Blue Notifier averages 4.0 out of 5 from 2 ratings, while Blau averages 5.0 from 3 ratings.

### Do Blue Notifier or Blau have ads?

Blue Notifier shows ads; Blau does not.

### Which is updated more often, Blue Notifier or Blau?

Blue Notifier ships an update every 3 months, and Blau monthly. Most recently, Blue Notifier was updated on November 3, 2026 and Blau on November 3, 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.*